View Compilation Error

0_0_35941785_15517.cpp: In function 'int main()':
0_0_35941785_15517.cpp:6:5: error: '_int64' was not declared in this scope
     _int64 ls[30];
     ^
0_0_35941785_15517.cpp:7:2: error: 'ls' was not declared in this scope
  ls[1]=0;
  ^
0_0_35941785_15517.cpp:9:12: error: expected ';' before 'gq'
     _int64 gq[30];
            ^
0_0_35941785_15517.cpp:10:2: error: 'gq' was not declared in this scope
  gq[1]=1;
  ^
0_0_35941785_15517.cpp:20:16: error: expected ';' before 'sum'
         _int64 sum=0;
                ^
0_0_35941785_15517.cpp:27:9: error: 'sum' was not declared in this scope
         sum+=gq[n]/(gq[k]*gq[n-k])*(ls[k]);
         ^
0_0_35941785_15517.cpp:29:22: error: 'sum' was not declared in this scope
     printf("%I64d\n",sum+1);
                      ^