题解 | 成绩排序

#include <bits/stdc++.h>
using namespace std;

struct st{
    int id;
    int score;
    bool operator <(st a){
        if(score==a.score)return id<a.id;
        else return score<a.score;
    }
};

int main(){
    int n;
    while(cin>>n){
        st a[n];
        for(int i=0;i<n;i++){
            cin>>a[i].id>>a[i].score;
        }
        sort(a,a+n);
        for(auto x:a){
            cout<<x.id<<" "<<x.score<<endl;
        }
    }
}

自定义稍复杂的比较写法测试