#include<stdio.h>
 int main()
 {
     int n,k,b;
     scanf("%d,%d,%d",&n,&k,&b);
     
    for(int i = 0; i < n; i++)
     {
     int x,y;
     scanf ("%d,%d",&x,&y);
     int y0=k*x+b;
     if (y==y0)
     {
         printf ("Point (%d,%d)lies on line y=%dx+%d\n",x,y,k,b);
     }
     else
     {
     printf("Point (%d,%d)does not lie on line Y=%dx+%d\n"x,y,k,b);
     }
      }
      return 0;
 }

但凡你用个代格式化的编辑器就能发现这个错误