View Compilation Error

0_0_15141758_26504.cpp: In function 'int main()':
0_0_15141758_26504.cpp:9:2: error: '_int64' was not declared in this scope
  _int64 sum,sum1;
  ^
0_0_15141758_26504.cpp:15:5: error: 'sum' was not declared in this scope
     sum=1;s=0;sum1=1;
     ^
0_0_15141758_26504.cpp:15:15: error: 'sum1' was not declared in this scope
     sum=1;s=0;sum1=1;
               ^