#include <bits/stdc++.h>
using namespace std;
#define int long long
const int MAXN = 100000;

int n, ans = 0;

int read(){
	int r = 0, flag = 1;
	char c = getchar();
	while (c < '0' && c > '9') {
		if (c == '-') flag = -1;
		c = getchar();
	}
	while (c <= '9' && c >= '0') {
		r = (r << 1) + (r << 3) + (c - '0');
		c = getchar();
	}
	return r * flag;
}

signed main() {
	n = read();
	for (int i = 1; i <= n; i++) {
		int a = read();
		ans += a;
	}
	cout << ans;
	
	return 0;
}

问别人都觉得没问题，为什么交了爆零呢 $\dots$