洛谷：P1104 生日

#include<iostream>
#include<algorithm>
using namespace std;

class stu{public:
    char *name;
    int y,m,d;
    double is;
    stu(){name=new char[20];}
}input[100];
int n,month[]={31,30,31,30,31,30,31,31,30,31,30,31};

bool compare(const stu &a,const stu &b){
    if(a.y==b.y){
        int temp0=a.m*month[a.m-1]+a.d;
        int temp1=b.m*month[a.m-1]+b.d;
        if(temp1!=temp0)
            return temp0<temp1;
        return a.is>b.is;
    }return a.y<b.y;
}
int main(){
    int i;
    cin>>n;
    for(i=0;i<n;i++){
        cin >>input[i].name
            >>input[i].y
            >>input[i].m
            >>input[i].d;
        input[i].is=i;
    }
    stable_sort(input,input+n,compare);
    for(i=0;i<n;i++){
        cout<<input[i].name<<endl;
    }
    return 0;
}

https://www.luogu.com.cn/problem/P1104