题目描述

样例

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

int days[13]={0,31,29,31,30,31,30,31,31,30,31,30,31};
bool isright(int year,int month,int day){
    if(year<1960||year>2059) return false;
    if(month<1||month>12) return false;
    if(day<1||day>days[month]) return false;
    if(month==2){
        int flag = (year%400==0)||(year%100!=0&&year%4==0) ;
        if(!flag&&day>28){
            return false;
        }
    }
    return true;
}

int main(){
    int a,b,c;
    set<int> date;
    scanf("%d/%d/%d",&a,&b,&c);

    int y=a+1900;
    if(y<1960||y>2059){
        y+=100;
    }
    date.insert(y*10000+b*100+c);

    y=c+1900;
    if(y<1960||y>2059){
        y+=100;
    }
    date.insert(y*10000+a*100+b);
    date.insert(y*10000+b*100+a);

    for(set<int >::iterator it=date.begin();it!=date.end();it++){
        int d=*it;
        int day=d%100;
        d/=100;
        int month=d%100;
        d/=100;
        int year=d;
        if(isright(year,month,day)){
            printf("%04d-%02d-%02d\n",year,month,day);
        }
    }
    return 0;
}