新手求助。6，7，8测试点过不了

#include <cstdio> 
#include <algorithm>
#include <iostream>
int a[301],b[301],c[301],d[301],f[301];
void swap(int &a,int &b){
    int temp = a;
    a = b;
    b = temp;
}
using namespace std;
int main()
{
    int n,i,j,count=1,temp=0;
    scanf("%d",&n);
    for(i=1;i<=n;i++){
        scanf("%d%d%d",&a[i],&b[i],&c[i]);
        f[i] = count++;
        d[i] = a[i]+b[i]+c[i];
    }
    sort(a,a+n);
    for(i=1;i<n;i++){
        for(j=i+1;j<=n;j++){
            if(d[j]>d[i]){
                swap(d[j],d[i]);
                swap(f[j],f[i]);
            }
            else if(d[j]==d[i]&&f[j]<f[i]){
                swap(d[j],d[i]);
                swap(f[j],f[i]);
            }
        }
    }
    for(i=1;i<=n;i++){
        cout<<f[i]<<" "<<d[i]<<endl;
        temp++;
        if(temp==5)  break;
    }
    return 0;
}