【水】#63 A. Young Physicist
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这道题并没有什么可以说的呢,那么就当给大家讲讲题意吧^_^
有n个向量,每行的三个数字构成了向量(a,b,c),问这么多向量和是否为0向量,那么不就是三维分别求和都为0即可吗?
x、y、z向量上的分别加一加,都为0就是yes啦~
#include <cstdio>#include <iostream>using namespace std;int main(){int n;cin>>n;int x=0,y=0,z=0;for(int i=0;i<n;i++){int xx,yy,zz;scanf("%d%d%d",&xx,&yy,&zz);x+=xx,y+=yy,z+=zz;} cout<<(x==0&&y==0&&z==0?"YES":"NO");return 0;}
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