求助大佬，后5个点全爆了

P2010 [NOIP2016 普及组] 回文日期

Stevehim @ 2022-10-03 22:20:36

RT

#include <cstdio>
#include <cstring>
#include <iostream>
#include <cmath>
#include <algorithm>
#include <string>
using namespace std;

int check(string mon, string da) { //检查回文数
    int month = stoi(mon), day = stoi(da);
//  cout << month << ' ' << day << endl;
    if (month == 0 || month > 12)
        return 0;
    if ((month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) && day > 31)
        return 0;
    if ((month == 4 || month == 6 || month == 9 || month == 11) && day > 30)
        return 0;
}

int year1, month1, day1;
int year2, month2, day2;

int sheng(string year4) {
    string year3 = year4;
    reverse(year3.begin(), year3.end());
    string month, day;
    month += year3[0];
    month += year3[1];
    day += year3[2];
    day += year3[3];
//  cout << "year3=" << year3 << ' ' << month << ' ' << day << endl;
    if (!check(month, day)) {
        return 0;
    }
    if (year4 == to_string(year1)) { //开判断
//      cout << "ok" << endl;
        if (stoi(month) >= month1 && stoi(day) >= day1) {
            return 1;
        } else {
            return 0;
        }
    } else if (year4 == to_string(year2)) {
        if (stoi(month) <= month2 && stoi(day) <= day2) {
            return 1;
        } else {
            return 0;
        }
    } else {
        return 1;
    }
}
int sum = 0;

int main() {
    scanf("%4d%2d%2d", &year1, &month1, &day1);
//  cout << year1 << ' ' << month1 << ' ' << day1 << endl;
    scanf("%4d%2d%2d", &year2, &month2, &day2);
//  cout << year1 << ' ' << month1 << ' ' << day1 << endl;
    //判断之间的年数，生成回文数
    for (int i = year1; i <= year2; i++ ) {
        if (sheng(to_string(i))) {
            sum++;
        }
    }
    cout << sum;
    return 0;
}

by Wangyunzhe1688 @ 2022-10-07 20:31:07

#include<bits/stdc++.h>
using namespace std;
int f(int x){
    int sum=0;
    while(x){
        sum=sum*10+x%10;
        x/=10;
    }return sum;
}
bool year(int y1){
    if((y1%4 == 0&&y1%100 != 0)||y1%400 == 0){
        return true;
    } else {
        return false;
    }

}
bool month1(int m1){
    if(m1>=1&&m1<=12) return true;
    else return false;
}
bool day1(int m1,int y1,int d1){

    if(m1 == 1||m1 ==3||m1 ==5||m1 ==7||m1 ==8||m1 ==10||m1 ==12) {
        if(d1<=31&&d1>=1) return true;
        else return false;
    }

    if(m1 ==4||m1 ==6||m1 ==11||m1 ==9){
        if(d1<=30) return true;
        else return false;
    }
    if(m1 == 2){
        if(year(y1)){
            if(d1<=29){
                return true;
            }else{
                return false;
            }   
        }else{
            if(d1<=28){
                return true;
            }else{
                return false;
            }
        }   
    }       
}
int main(){
    int y1,m1,d1,y2,m2,d2,cnt = 0;

    scanf("%4d%2d%2d\n%4d%2d%2d",&y1,&m1,&d1,&y2,&m2,&d2);
    for(int i = y1;i<=y2;i++){
        int date = i*10000+f(i);
        int month=date/100%100,day=date%100;
        if(month1(month)&&day1(month,i,day)&& date >=y1*10000+m1*100+d1&&date<=y2*10000+m2*100+d2){
            cnt++;
        } 
    }
    cout<<cnt;
    return 0;
}

可以参考一下

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