View Compilation Error

0_0_24596363_12775.cpp: In function 'int main()':
0_0_24596363_12775.cpp:7:3: error: 'int64' was not declared in this scope
   int64 a[110],sum;  
   ^
0_0_24596363_12775.cpp:11:26: error: 'a' was not declared in this scope
           scanf("%I64d",&a[i]);  
                          ^
0_0_24596363_12775.cpp:12:13: error: 'a' was not declared in this scope
        sort(a,a+n);  
             ^
0_0_24596363_12775.cpp:13:8: error: 'sum' was not declared in this scope
        sum=a[n-1]*(2010-n);  
        ^