View Compilation Error

0_0_19010431_23646.cpp: In function 'int main()':
0_0_19010431_23646.cpp:3:2: error: '_int64' was not declared in this scope
  _int64 p[51],n;
  ^
0_0_19010431_23646.cpp:4:2: error: 'p' was not declared in this scope
  p[1]=1;
  ^
0_0_19010431_23646.cpp:9:20: error: 'n' was not declared in this scope
  while(scanf("%d",&n)!=EOF){
                    ^