View Compilation Error

0_0_36112223_13538.cpp: In function 'int main()':
0_0_36112223_13538.cpp:42:3: error: 'int_64' was not declared in this scope
   int_64 sum1=0,sum2=0,l=1;
   ^
0_0_36112223_13538.cpp:45:4: error: 'sum1' was not declared in this scope
    sum1+=(pre[r]-pre[l-1])*((b/k)/l)*((d/k)/l);
    ^
0_0_36112223_13538.cpp:46:4: error: 'sum2' was not declared in this scope
    sum2+=(pre[r]-pre[l-1])*((b/k)/l)*((b/k)/l); 
    ^
0_0_36112223_13538.cpp:49:27: error: 'sum1' was not declared in this scope
   cout<<"Case "<<I<<": "<<sum1-(sum2-1)/2<<endl;
                           ^
0_0_36112223_13538.cpp:49:33: error: 'sum2' was not declared in this scope
   cout<<"Case "<<I<<": "<<sum1-(sum2-1)/2<<endl;
                                 ^