codeforces 69A. Young Physicist

A. Young Physicist

题目链接： codeforces 69A

题意：

输入n个三维点，判断是否平衡，x轴坐标相加等于0 且 y轴坐标相加等于0 且 z轴坐标相加等于 0即为平衡，否则不平衡

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int maxn = 2e5 + 5;
int main(){int n, x , y , z, x1 = 0, y1 = 0, z1 = 0;cin >> n;for(int i = 1; i <= n; i++){cin >> x >> y >> z;x1 += x;y1 += y;z1 += z;}if(x1 == 0 && y1 == 0 && z1 == 0){cout << "YES" << endl;}else{cout << "NO" << endl;}return 0;
}

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codeforces 69A. Young Physicist

A. Young Physicist

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