/in/foo.cc: In function 'int main()':
/in/foo.cc:11:6: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses]
   if (x[5] == '2' && x[6] == '5')
      ^
/in/foo.cc:8:14: warning: unused variable 'i' [-Wunused-variable]
  int ans = 0,i=0;
              ^