0分救助

#include<bits/stdc++.h>
using namespace std;
int main(){
	int yu[1005],shu[1005],yin[1005],n,total[1005],b;
	cin>>n;
	for(int i=0;i<n;i++){
		cin>>yu[i]>>shu[i]>>yin[i];
		total[i]=yu[i]+shu[i]+yin[i];
	}
	for(int i=0;i<=n;i++){
		for(int j=0;j<=n;j++){
			if((yu[i]-yu[j]<=5||yu[j]-yu[i]<=5)&&(shu[i]-shu[j]<=5||shu[j]-shu[i]<=5)&&(yin[i]-yin[j]<=5||yin[j]-yin[i]<=5)&&(total[i]-total[j]<=5||total[j]-total[i]<=5)){
				b++;
			}
		}
	}
	cout<<b;
	return 0;
}