View Compilation Error

0_0_20672005_6226.cpp: In function 'int main()':
0_0_20672005_6226.cpp:8:5: error: '__int64' was not declared in this scope
     __int64 a[10005];
     ^
0_0_20672005_6226.cpp:9:18: error: 'scanf' was not declared in this scope
     scanf("%d",&t);
                  ^
0_0_20672005_6226.cpp:15:28: error: 'a' was not declared in this scope
             scanf("%I64d",&a[i]);
                            ^
0_0_20672005_6226.cpp:18:19: error: 'a' was not declared in this scope
             int p=a[i]*a[i+1];
                   ^
0_0_20672005_6226.cpp:21:26: error: 'a' was not declared in this scope
         printf("%I64d\n",a[n-1]);
                          ^
0_0_20672005_6226.cpp:21:32: error: 'printf' was not declared in this scope
         printf("%I64d\n",a[n-1]);
                                ^