#include <iostream>
#include <cstring>
#include <cstdlib>
#include <algorithm>
using namespace std;
// 闰年
int run(int y){
if(y%4==0 && y%100!=0 && y%400==0){
return 1;
}
return 0;
}
// 天数
int mon(int m,int y){
switch(m){
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
return 31;
case 4:
case 6:
case 9:
case 11:
return 30;
case 2:
if(run(y)==1) return 29;
else return 28;
}
}
// 判断回文
int HuiWen(string data){
for(int i=0;i<4;i++){
if(data[i]!=data[7-i]){
return 0;
}
}
return 1;
}
//判断ababbaba
int abab(string data){
if(HuiWen(data)==0) return 0;
if(data[0]==data[2] && data[1]==data[3]) return 1;
}
int main()
{
string m[] = {"01","02","03","04","05","06","07","08","09","10","11","12"};
string d[32];
string data;
int y;
cin >> data;
// 截取年份
y = stoi(data.substr(0,4));
// 天数填入
for(int i=1;i<=31;i++){
if(i<10) d[i] = '0'+to_string(i);
else{
d[i] = to_string(i);
}
}
string hw="",ab,newy;
int HF=1;
//遍历年份
while(1){
y++;
//12个月
for(int i=0;i<12;i++){
//天数
for(int j=1;j<=mon(i+1,y);j++){
newy = to_string(y)+m[i]+d[j];
if(HuiWen(newy)==1 && HF==1){
hw=newy;
HF=0;
}
if(abab(newy)==1){
ab=newy;
cout<< hw <<endl;
cout<< ab;
exit(1);
}
}
}
}
return 0;
}
蓝桥杯题目-回文日期
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