aminusb/ver.c

   1 #include <stdio.h>
   2
   3 int main(void){
   4         FILE *output = fdopen(3, "r");
   5         int a, b, ret;
   6         scanf("%d%d", &a, &b);
   7         fscanf(output, "%d", &ret);
   8         if(a-b == ret){
   9                 printf("20");
  10                 return 0;
  11         } else
  12                 return 1;
  13 }
  14