直接套y总的模板即可

#include <iostream>
#include <cstring>
#include <cstdio>
#include <algorithm>
using namespace std;
int days[13] = {0,31,28,31,30,31,30,31,31,30,31,30,31};
int leap(int year)
{
    if(year % 4 == 0 && year % 100 != 0 || year % 400 == 0) return 1;
    return 0;
}
bool check(int year,int month,int day)
{
    if(month <= 0 || month > 12) return false;
    if(day == 0 || month != 2 && day > days[month]) return false;
    if(month == 2)
    {
        int x = leap(year);
        if(day > days[2] + x) return false;
    }
    return true;
}
int main()
{
    int a,b,c;
    scanf("%d/%d/%d",&a,&b,&c);
    for(int i = 19600101;i <= 20591231;i++)
    {
        int year = i / 10000;
        int month = i % 10000 / 100;
        int day = i % 100;
        if(check(year,month,day))
        {
            if(a == year % 100 && b == month && c == day
            || a == month && b == day && c == year % 100
            || a == day && b == month && c == year % 100)
            {
                printf("%d-%02d-%02d\n",year,month,day);
            }
        }
    }
    return 0;
}