View Compilation Error

0_0_29296316_13819.cpp: In function 'int main()':
0_0_29296316_13819.cpp:5:5: error: 'int64' was not declared in this scope
     int64 i,n,a[100001];
     ^
0_0_29296316_13819.cpp:6:5: error: 'a' was not declared in this scope
     a[0]=0;
     ^
0_0_29296316_13819.cpp:7:9: error: 'i' was not declared in this scope
     for(i=1;i!=100001;++i)
         ^
0_0_29296316_13819.cpp:14:16: error: 'n' was not declared in this scope
     while(cin>>n&&n>=0)
                ^