View Compilation Error

0_0_18676273_9282.cpp: In function 'int main()':
0_0_18676273_9282.cpp:5:2: error: '_int64' was not declared in this scope
  _int64 x,y;
  ^
0_0_18676273_9282.cpp:10:23: error: 'x' was not declared in this scope
   scanf("%I64d%I64d",&x,&y);
                       ^
0_0_18676273_9282.cpp:10:26: error: 'y' was not declared in this scope
   scanf("%I64d%I64d",&x,&y);
                          ^