0 like 0 dislike
1k views

The 13-digit International Standard Book Number (ISBN) is a unique code that identifies a book commercially. The last digit is a check digit used for error detection. To calculate its value, each digit of the first twelve digits is alternately multiplied, from left to right, by 1 or 3. The products are summed up and divided by 10. The check digit is the remainder of the division subtracted from 10. If it is 10, it becomes 0. 

ISBN檢查號的計算方法: 前12個數字,奇數項 乘以 1 , 偶數項乘以 3

For example, assume that the first twelve digits are 978960931961.  

假設號碼前12位是978960931961

(a) (9*1 + 7*3 + 8*1 + 9*3 + 6*1 + 0*3 + 9*1 + 3*3 + 1*1 + 9*3 + 6*1 + 1*3) = 126 

(b) The check digit = 10 – (126 % 10) = 10 – 6 = 4  

檢查號 = 10 - 餘數 = 10 – (126 % 10) = 10 – 6 = 4  

So the valid ISBN is: 9789609319614

Write a program that reads a 13-digit ISBN and checks the last digit to see if it is valid or not. 

寫一個輸入13位ISBN號碼 判斷最後一個數字是否檢查碼即可

#Try 1:

Input:

9789609319614

Output: 

Valid ISBN

 

#Try 2:

Input:

9781482214505

Output: 

Valid ISBN

 

#Try 3:

Input:

9780132936493

Output: 

Invalid ISBN

 

[Exam] asked in Midterm by (12.1k points)
ID: 36751 - Available when: 2017-11-15 14:10 - Due to: Unlimited
| 1k views

26 Answers

0 like 0 dislike
Hidden content!
#include<stdio.h>

int main(){
    char isbn[12];
    int a,b,c,d,e,f,g,i=0,j;
* **** * * * ** * * ** * * ** ** ** * **
* ** * * *** **** *** ** *
** **** ** * ** ** *** * * *** * * *** * * ***
** **** *** * * ** *** * **
* * * * ** * * ** * * *** * * * * ***** ***** * * ** * **
** * * * ** ** ** ***
* * ** * * * *****
* * ** ** *** * ** ** *
* * * ** ** * * *** ** ** * **
* ** * * **
* * *** ** * ***** * ** * **** * ** * * * *** * ISBN");
*** * * *** ** *** ** * *
* ** * ******* * * ** * ** * * * * * ** * * * * * * ISBN");

}
answered by (-32 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
0 like 0 dislike
Hidden content!
#include<stdio.h>

int main(){
    char isbn[12];
    int a,b,c,d,e,f,g,i=0,j;
* * * ** *** * * **** * * ** * * * * ** * *
* ** * * * ** **** *** * *** ***
* ** **** ** * **** * * * * ** * * *** *** * ** ** ** * ***
* *** * *** ** ** *** ** ** * *
*** * ** ** ** * * * * * * * * **** ** ***** * **
* * ** ** * * * **
* * * * **** ****** * **
* * * *** * * * * *** * *** ***** **
* * * * **** * **** * ** * **
** ** * *** ** * *** ** ***
* ** *** * * * * * * *** * * * * ** * *** *** * ISBN");
** * * * * ** * *
** *** * * ** *** * * * * *** * **** *** *** * ** ** ***** * ISBN");

}
answered by (-32 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
0 like 0 dislike
Hidden content!
#include <stdio.h>
#include <string.h>

int main(){
    ///long long int n = 978960931962;

    long long int n;// = 9789609319614;
    int lastDigit;
    int temp1;
    int sum=0;
    int check=0;

** ** ******* ** * * ** ** * * ** ****** ****

* ** *** **** * *** *** * * * * * ** ** ** **** = n%10;
* *** * *** ** *** *** ** * ** * * * = n/10;

* ** *** * * *** *** * * * ** * ** * ** = n%10;
****** * *** * ** ***** ** ** ***** * *** **** ** = temp1*3;
** ** **** *** * * * **** ** ** * * ** ** * = sum + temp1;
* * ** * *** *** ** *** ** **** *** * * * *** * ** * * ** ** ", temp1);
* * *** ***** ** ** * * * * **** * ** * * = n/10;


* * * * ** * * ** * *** ** ***** * ***** * * * ** = n%10;
*** ** ** * * * *** * * * ** *** ** ** * * * * * ** * = temp1*1;
* ** *** * ** * ** *** ** * = sum + temp1;
** ****** *** * ***** *** ** ** * *** ** * **** ** ", temp1);
* ****** * ** ** * * * * ** ** = n/10;

* *** *** * **** * ** * ** * * ** * ***** *** = n%10;
* * * * * * ** ***** * ** **** *** ******** = temp1*3;
** * * * ** * *** *** * ** ** * * ** * *** ****** ***** = sum + temp1;
* * *** * * ** * * ** ** * * ** ** * * * ", temp1);
** * *** *** * ** *** * * * **** * * * ** = n/10;

* ** *** *** ** * ** * * * *** ** ** ** = n%10;
** *********** * * * ** * ** ** * ** ** *** * ** = temp1*1;
*** ****** * ***** ** * * ** ** * * = sum + temp1;
* ** *** * ** ** ** ***** * ** ** * * * ** ** * * ** * ", temp1);
* ** ** ** * ** * ** *** * ** * * ***** = n/10;

**** * *** ****** *** * ** ******* ** * * = n%10;
* *** ** ******* * * ** ** * ****** * * * = temp1*3;
* ***** ** ***** * * ** *** *** **** ** *** * = sum + temp1;
** ****** **** ** * **** * * ****** ****** * * * * *** * * * ", temp1);
* ** * ****** * **** ** ***** * * * * ** * ** * * * = n/10;

* * * ** *** *** ** **** *** *** ******** = n%10;
* * * *** ****** * * ** * ********* * ** * ** = temp1*1;
**** * * *** * ** ***** *** * * * * ** * = sum + temp1;
**** * * ** **** * ****** *** * **** * **** *** * ", temp1);
** ** ** ** ** ***** *** ** *** ** * * * ** ** = n/10;

* ** ***** ** *** * ** *** ** *** * * * ** * **** **** = n%10;
*** *** ** * ** ** * ** ** ** * * * ** * ** = temp1*3;
**** * ** **** *** ** ****** ** ** * = sum + temp1;
* * ** *** * ** ** * ** * * * ** ** * ***** * * ", temp1);
* * ** * * * * **** * ** * * = n/10;

**** ** * * ** **** ****** * * * * * ** ** * * = n%10;
* ** ******* * ** * * ** ** * ** * * **** *** = temp1*1;
** * * * * ** ** ** *** *** * *** * * *** * * * * = sum + temp1;
* *** * ************** * ** ** ***** * ** * ", temp1);
* * *** * * * * ** ******************* ** * * = n/10;

** * * **** * * ** ** ** *** ** ** * * ** ** = n%10;
*** *** ** * * **** *** * **** ** * = temp1*3;
* * *** * *** ** *** * ** ** * ** = sum + temp1;
****** ** ****** ****** * ** ****** *** ** *** **** ** ", temp1);
*** * * * ** *** **** ** ** ** ** * = n/10;

** * * * **** * ** * * ** * * **** *** * * ** = n%10;
*** * * ** * * * * ** * * ** * ** * * * * * = temp1*1;
** *** * * * **** * * ***** ** * * ** ** * = sum + temp1;
** **** ** * *** * * ****** * ** ** * * ", temp1);
** ** * ** * ** **** * *** * ** ** = n/10;

** * * * ***** ** **** * * * * ** * *** *** * * = n%10;
* ** * * *** ** * * *** ** *** *** * ****** ** = temp1*3;
* * **** * ******* ** ****** *** * * *** = sum + temp1;
***** * ******* ***** * * * ** *** *** * ** *** * * * * * ", temp1);
***** * ** * * ***** *** *** *********** ** * = n/10;

** * ** **** * * * ** ********** * = n%10;
* * * **** * * *** * ***** * ** ** **** * ** ** * = temp1*1;
* * *** * ** ** * * ***** * * * ** * * *** = sum + temp1;
******** * ** * * ** ***** *** *** * ***** ** ", temp1);

* * * * * *** * * ***** * ***** *** * * * * ",sum);
* * ** * ** ** * * *** * ** ** * = 10 - (sum%10);


* ** * * **** * * ** ** * ** *** * * * ** *** == check)
***** *** *********** * * *** * * *** ***** ***** * * ** * ******** ** * ISBN\n");
* ** * **** ****** ** ** * * ** * **** *** * *
* ** ** * ** ** * *** * **** * * * * ** * * * * * ** * ** **** *** ** ISBN\n");

    return 0;
}
90/100 answered by (-74 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
0 like 0 dislike
Hidden content!
#include *** *** ** ***


int main (void)
{

int ** ** * * ** *** **** *** **** ** *

**** * ** ** ** * * * ** ** ** *** ** *** ** * ** * **** * *** * * ** ** ** * * * ** * ** ** * ** *



total= ** *** * * * * * ** * * * **** *** *** * * * * *

check_digit= (10-(total%10));

 if (check_digit!=num13)
* * * * *****

* * *** * ** * ** * * ISBN");

** * * ** * **

***** ** * ** * if * * *** * **
**** ** * *** *** * ****** * *** * * *** *


* * ** ** * ** ** * ******* * ** * * **** ** ***** * * ** * ** ISBN");

}

return 0;
}
answered by (-107 points)
0 0
prog.c: In function 'main':
prog.c:9:7: warning: too many arguments for format [-Wformat-extra-args]
 scanf("%13d",&num1,&num2,&num3,&num4,&num5,&num6,&num7,&num8,&num9,&num10,&num11,&num12,&num13);
       ^~~~~~
0 like 0 dislike
Hidden content!
#include * ** * * ***


int main (void)
{

int * * * * ** ***** * ** * ** ** *** * ** *** * * * * **

**** * ** * ** * * ** ** * * * * * ** ** * * * * * * * *** ** * ** * **** * * * ** * *** *** *



total= ** * * * * * * * * ** * ***** * *** * ** *** **** * * * **

check_digit= (10-(total%10));

 if *** *
** *** * * *** *

*** ** ******** ***** * **** ISBN");

}

** ** * * ** * ** ****** * if * * ** *
* *** *** *** *** ** ** * ****


** ******** * ** ** * * ** ** * ** ** * ** **** * **** ** ** ISBN");

}

return 0;
}
answered by (-107 points)
0 0
prog.c: In function 'main':
prog.c:9:7: warning: too many arguments for format [-Wformat-extra-args]
 scanf("%13d",&num1,&num2,&num3,&num4,&num5,&num6,&num7,&num8,&num9,&num10,&num11,&num12,&num13);
       ^~~~~~
0 like 0 dislike
Hidden content!
#include<stdio.h>
int main()
{
* ** * *** * * *** * * a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, sum1,sum2, sum3, check;
** * * ** * *** * ** ** * * ** *** ***** **** *** **** ** ** * * ** ***** * * * * * * * * *** * * * * * * ***** * * * *

******** ** ** ** * * *** * * ** * **
** * * **** ********* * * * * ***** *

** * *** ** * ***** *** sum1+sum2;

***** * ** * ** * 10 - (sum3%10);

** ***** * * * ** * * *****
* *** * * * * ** * *
* * * * * * ** * * * ** * * ** *** **** ** * * * * ISBN");
* **** *** * * * *****
**** ** * ** * *
* * * ** * * ** * *
**** * ** * ** ** * **** * * * * ** ** **** ** ** IBSN");
* ** * * **** ***** * * *
* * * *** **** * ** 0;
}
answered by (-233 points)
0 0
prog.c: In function 'main':
prog.c:5:14: warning: format '%ld' expects argument of type 'long int *', but argument 2 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
              ^
prog.c:5:17: warning: format '%ld' expects argument of type 'long int *', but argument 3 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
                 ^
prog.c:5:20: warning: format '%ld' expects argument of type 'long int *', but argument 4 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
                    ^
prog.c:5:23: warning: format '%ld' expects argument of type 'long int *', but argument 5 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
                       ^
prog.c:5:26: warning: format '%ld' expects argument of type 'long int *', but argument 6 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
                          ^
prog.c:5:29: warning: format '%ld' expects argument of type 'long int *', but argument 7 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
                             ^
prog.c:5:32: warning: format '%ld' expects argument of type 'long int *', but argument 8 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
                                ^
prog.c:5:35: warning: format '%ld' expects argument of type 'long int *', but argument 9 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
                                   ^
prog.c:5:38: warning: format '%ld' expects argument of type 'long int *', but argument 10 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
                                      ^
prog.c:5:41: warning: format '%ld' expects argument of type 'long int *', but argument 11 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
                                         ^
prog.c:5:44: warning: format '%ld' expects argument of type 'long int *', but argument 12 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
                                            ^
prog.c:5:47: warning: format '%ld' expects argument of type 'long int *', but argument 13 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
                                               ^
prog.c:5:50: warning: format '%ld' expects argument of type 'long int *', but argument 14 has type 'int *' [-Wformat=]
     scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
                                                  ^
0 like 0 dislike
Hidden content!
#include ** *** * *


int main (void)
{

int * * ****** * **** ** * ** * ** * ** *

* *** ***** * ** * * ** **** * * *** *** * * ** ** * ** * * * * **** * * * * ***** * * * ** *



total= ** ** * * * ** ***** * * ** ** *** * * *** ** ** ********
check_digit= 10-(total%10);

 if * ***
* ** * * * **** * * *

* ** * ***** ** * * * *** *
}

 else if ** *
* ** ** * * * * ** *

******* * ** * * ** ** *** ** * ** * * * * * * * *** * *****

 }

return 0;
}
answered by (-107 points)
0 0
prog.c: In function 'main':
prog.c:9:7: warning: too many arguments for format [-Wformat-extra-args]
 scanf("%13d",&num1,&num2,&num3,&num4,&num5,&num6,&num7,&num8,&num9,&num10,&num11,&num12,&num13);
       ^~~~~~
0 like 0 dislike
Hidden content!
#include *** * * * ** *


int main (void){

int * * **** ****** ** * ** *** * ** ** * * ** *** *

* *** ***** *** **** **** * ****** *** ****** ** * **



total= *** * ***** ** * * * **** ** * ** * *** * ** **** ****** ** **
check_digit= 10-(total%10);

 if ****
* * * * ** * * * *** ** *


** **** * * ** *** *** * ** * * ** **
}
 
** * * * if ***** ** ******
* * * * ** * ***

* *** ** * ** * *** * ** * ** * * ** * * ** * ** * ** * *

 }

return 0;
}
answered by (-107 points)
0 0
prog.c: In function 'main':
prog.c:8:11: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
 scanf("%13d",num1,num2,num3,num4,num5,num6,num7,num8,num9,num10,num11,num12,num13);
           ^
prog.c:8:7: warning: too many arguments for format [-Wformat-extra-args]
 scanf("%13d",num1,num2,num3,num4,num5,num6,num7,num8,num9,num10,num11,num12,num13);
       ^~~~~~
0 like 0 dislike
Hidden content!
#include<stdio.h>
int main(void)
{
* ** * ** * ** ** * * **** a,b,c,d,e,f,g,h,i,j,k,l,m;
** ** * ** *********** ** * **** ***** * * * ** ** * *** **** * * ** * * *** ** ** ** * * * * * * ** * ** ***** ** * ** * **

* * * * ** ** ** ** ** * check,sum;
* **** *** * *** * * * ** * *
****** * * ****** ** *** *** ** * * ** * ** * * * *
** * ** ** * * ***

* * ** ** ** * ** ** *****
* ***** * ** ***
* * * *** * ** * * * * ** * ** ** * * **** **
* * ** ***** * **

    



* * * * * * * * != m)
* ** *** *** * * * *** *
** ** * * ** ** * * ** *** * ** *** * * ISBN");
*** * * * * * **** ** ** *
*** **** ** * * ** ** ** **
* * * * * ** ** *
**** * ***** ****** * * * * *** ISBN");
    }

return 0;
}
answered by (-249 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
0 like 0 dislike
Hidden content!
#include * * *** *
int main (){
int ** ** * ***** * * *
int * ** *
** ******** number 13: ");
* * *** **** * * * * ** *** * ** ******** * * * *** * **
* * *** * ******* ** **
** **** * * * * ** *** * **
*** ** *
* * * ** * **
* * *
* * * * **** ****
}else {
* * ****** ** * * *** *
}

return 0;
}
answered by (16 points)
0 0
prog.c: In function 'main':
prog.c:6:9: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
 scanf("%d%d%d%d%d%d%d%d%d%d%d%d",i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12);
         ^
prog.c:6:11: warning: format '%d' expects argument of type 'int *', but argument 3 has type 'int' [-Wformat=]
 scanf("%d%d%d%d%d%d%d%d%d%d%d%d",i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12);
           ^
prog.c:6:13: warning: format '%d' expects argument of type 'int *', but argument 4 has type 'int' [-Wformat=]
 scanf("%d%d%d%d%d%d%d%d%d%d%d%d",i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12);
             ^
prog.c:6:15: warning: format '%d' expects argument of type 'int *', but argument 5 has type 'int' [-Wformat=]
 scanf("%d%d%d%d%d%d%d%d%d%d%d%d",i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12);
               ^
prog.c:6:17: warning: format '%d' expects argument of type 'int *', but argument 6 has type 'int' [-Wformat=]
 scanf("%d%d%d%d%d%d%d%d%d%d%d%d",i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12);
                 ^
prog.c:6:19: warning: format '%d' expects argument of type 'int *', but argument 7 has type 'int' [-Wformat=]
 scanf("%d%d%d%d%d%d%d%d%d%d%d%d",i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12);
                   ^
prog.c:6:21: warning: format '%d' expects argument of type 'int *', but argument 8 has type 'int' [-Wformat=]
 scanf("%d%d%d%d%d%d%d%d%d%d%d%d",i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12);
                     ^
prog.c:6:23: warning: format '%d' expects argument of type 'int *', but argument 9 has type 'int' [-Wformat=]
 scanf("%d%d%d%d%d%d%d%d%d%d%d%d",i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12);
                       ^
prog.c:6:25: warning: format '%d' expects argument of type 'int *', but argument 10 has type 'int' [-Wformat=]
 scanf("%d%d%d%d%d%d%d%d%d%d%d%d",i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12);
                         ^
prog.c:6:27: warning: format '%d' expects argument of type 'int *', but argument 11 has type 'int' [-Wformat=]
 scanf("%d%d%d%d%d%d%d%d%d%d%d%d",i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12);
                           ^
prog.c:6:29: warning: format '%d' expects argument of type 'int *', but argument 12 has type 'int' [-Wformat=]
 scanf("%d%d%d%d%d%d%d%d%d%d%d%d",i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12);
                             ^
prog.c:6:31: warning: format '%d' expects argument of type 'int *', but argument 13 has type 'int' [-Wformat=]
 scanf("%d%d%d%d%d%d%d%d%d%d%d%d",i1,i2,i3,i4,i5,i6,i7,i8,i9,i10,i11,i12);
                               ^
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:172.69.7.141
©2016-2024

Related questions

1 like 1 dislike
49 answers
[Exam] asked Nov 15, 2017 in Midterm by thopd (12.1k points)
ID: 32706 - Available when: 2017-11-15 14:10 - Due to: Unlimited
| 1.4k views
2 like 0 dislike
77 answers
[Exercise] Coding (C) - asked Oct 19, 2017 in Chapter 5: Selection Statements by thopd (12.1k points)
ID: 27667 - Available when: Unlimited - Due to: Unlimited
| 2.3k views
0 like 0 dislike
15 answers
[Exam] asked Dec 9, 2017 in Midterm by thopd (12.1k points)
ID: 36755 - Available when: 2017-11-15 14:10 - Due to: Unlimited
| 720 views
12,783 questions
183,443 answers
172,219 comments
4,824 users