题目描述

小白专用for语句暴力解法,有时间再写详解

样例

#include<iostream>
using namespace std;
bool checkyear(int n)
{
    int days[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
    int day=n%100;
    int month=n%10000/100;
    int year=n/10000;
    if(month<0||month>12)return false;
    if(day<0||(day>days[month]&&month!=2))return false;
    int x=0;
    if(month==2)
        x=year%4==0&&year%100||year%400==0;
    if(day>days[month]+x)return false;
    return true;
}
bool checkhui(int n)
{
    int a,b,c,d,e,f,g,h;
    a=n/10000000;
    b=n/1000000%10;
    c=n/100000%10;
    d=n/10000%10;
    e=n/1000%10;
    f=n/100%10;
    g=n/10%10;
    h=n%10;
    if(a==h&&b==g&&c==f&&d==e)
        return true;
    else
        return false;
}
bool checkABAB(int n)
{
    int a0,a1,a2,a3;
    a0=n/10000000;
    a1=n/1000000%10;
    a2=n/100000%10;
    a3=n/10000%10;
    if(a0==a2&&a1==a3&&a0!=a1)
        return true;
    else
        return false;
}
int main()
{
    int n,flag=1;
    cin>>n;
        for(int i=n;i<=89991231;i++)
        {
            if(checkyear(i)&&checkhui(i)&&i>n&&flag)
            {
                flag=0;
                cout<<i<<endl;
            }
            if(checkyear(i)&&checkhui(i)&&checkABAB(i)&&i>n)
            {
                cout<<i<<endl;
                break;
            }
            if(i==89991231)
            {
                cout<<90011009<<endl;
                cout<<90900909<<endl;
            }
        }

    return 0;
}