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x+y+z
来判断是否都为0,除非输入都是正数
#include <cstdio>
using namespace std;
int main(){
int a,b,c,x,y,z,n;
x = y = z = 0;
scanf("%d",&n);
for(int i = 0; i < n ;++i){
scanf("%d%d%d",&a,&b,&c);
x += a;y += b;z += c;
}
puts((x || y || z ? "NO":"YES"));
return 0;
}
[2016-03-22][CF][69A][Young Physicist]
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原文地址:http://www.cnblogs.com/qhy285571052/p/ef8210674b4105364d43df62e1666950.html