编译失败，求原因,勿喷,初学

# include<bits/stdc++.h>
using namespace std;
stack<int> sta;
int main(){
	int n, t;
	cin >> n;
	for(int i = 0; i < n; i++) {
		cin >> t;
		sta.push(t);
	}
    cout << sta.pop();
	return 0;
}