View Compilation Error

0_0_22361189_8111.cpp: In function 'int main()':
0_0_22361189_8111.cpp:7:2: error: '_int64' was not declared in this scope
  _int64 ans;
  ^
0_0_22361189_8111.cpp:10:3: error: 'ans' was not declared in this scope
   ans=1;
   ^