#include <iostream>
#include <stack>
#include <cmath>
#include <vector>
#include <string.h>
#include <queue>
#include <stdio.h>
#include <iomanip>
#include <cstdio>
#include <algorithm>
#define int long long
using namespace std;
const int N = 1e5 + 10;
const int INF = 0x3f3f3f3f;
signed main()
{
	int n;
	int a, ans;
	while(cin >> n)
	{
		ans = 0;
		for(int i = 1; i <= n; i++)
		{
			cin >> a;
			ans += a;
		}
		cout << ans << endl;
	}
	return 0;
}

一大群a+b正在向你冲来

#include <iostream>
#include <bits/stdc++.h>
using namespace std;
const int N=1e7+10;
const int INF=0x3f3f3f3f;
int main()
{
	int n,a,sum=0;
	while(cin>>n)
	{
		for(int i=1;i<=n;i++)
		{
			cin>>a;
			sum+=a;
		}
		cout<<sum<<"\n";
		sum=0;
	}
}

#include <math.h> #include <stdio.h> #include <iostream> using namespace std; int main() { int a,b; while(cin >> a >> b) { if(a == 0 && b == 0) break; cout << a + b << endl; } }

#include<iostream>

using namespace std;

int main() {

int a,b,sum=0;

while(cin>>a){

for(int i=1;i<=a;i++){

	cin>>b;

	sum+=b;

}

cout<<sum<<endl;

sum=0;

}

}