View Compilation Error

0_0_21357908_27565.cpp: In function 'int main()':
0_0_21357908_27565.cpp:30:3: error: 'int__64' was not declared in this scope
   int__64 ans=0;
   ^
0_0_21357908_27565.cpp:32:4: error: 'ans' was not declared in this scope
    ans+=(long long)(numc[i]*nump[i]);
    ^
0_0_21357908_27565.cpp:37:4: error: 'ans' was not declared in this scope
    ans+=(long long)(numc[nc-i]*nump[np-i]);
    ^
0_0_21357908_27565.cpp:41:20: error: 'ans' was not declared in this scope
   printf("%I64d\n",ans);
                    ^