View Code of Problem 20

#include <stdio.h>
int main ()
{
int N;
 while((scanf("%d",&n)!=-1))
{
if(n%3==0)
  printf("No");
  else printf("Yes");
}
return 0;
}
/*
Main.c: In function 'main':
Main.c:5:21: error: 'n' undeclared (first use in this function)
  while((scanf("%d",&n)!=-1))
                     ^
Main.c:5:21: note: each undeclared identifier is reported only once for each function it appears in
Main.c:4:5: warning: unused variable 'N' [-Wunused-variable]
 int N;
     ^
*/