View Compilation Error

0_0_16393054_13855.cpp: In function 'int main()':
0_0_16393054_13855.cpp:5:2: error: '_int64' was not declared in this scope
  _int64 s, c;
  ^
0_0_16393054_13855.cpp:8:25: error: 'c' was not declared in this scope
         scanf("%I64d", &c);
                         ^
0_0_16393054_13855.cpp:13:1: error: 's' was not declared in this scope
 s=0;
 ^