a1766465080 @ 2023-08-25 09:37:48
#include <iostream>
#include <string>
#include <algorithm>
using namespace std;
bool isRunnian(string date) {
int nums = 0;
for (int i = 3; i >= 0; --i) {
nums = nums * 10 + (date[i] - '0');
}
if (nums % 400 == 0 || (nums % 4 == 0 && nums % 100 != 0)) {
return true;
} else {
return false;
}
}
bool isValid(string year1, string year2, string monday1, string monday2, string now) {
// string monday = reverse(now.begin(), now.end());
string monday;
for (int i = 3; i >= 0; --i) {
monday.push_back(now[i]);
}
if (monday > "1231" || monday < "0100") {
return false;
}
string month(monday, 2);
string day = monday.substr(2, 2);
if (month[0] == '0') {
switch (month[1]) {
case '1' :
case '3' :
case '5' :
case '7' :
case '8' :
if (day > "31") {
return false;
}
break;
case '4' :
case '6' :
case '9' :
if (day > "30") {
return false;
}
break;
}
if (isRunnian(now) && month[1] == '2') {
if (day > "29") {
return false;
}
}
if (!isRunnian(now) && month[1] == '2') {
if (day > "28") {
return false;
}
}
} else {
switch (month[1]) {
case '0' :
case '2' :
if (day > "31") {
return false;
}
break;
case '1' :
if (day > "30") {
return false;
}
break;
}
}
if (now == year1) {
if (monday < monday1) {
return false;
}
}
if (now == year2) {
if (monday > monday2) {
return false;
}
}
return true;
}
int main() {
string date1, date2;
cin>>date1>>date2;
string year1;
string year2;
for (int i = 0; i < 4; ++i) {
year1.push_back(date1[i]);
year2.push_back(date2[i]);
}
// cout<<year1<<"\n";
// string year2(date2, 4);
// cout<<year2<<"\n";
string monday1 = date1.substr(4, 4);
string monday2 = date2.substr(4, 4);
int result = 0;
// cout<<monday1<<"\n";
// cout<<monday2<<"\n";
string now(year1);
while (now <= year2) {
if (isValid(year1, year2, monday1, monday2, now)) {
cout<<now<<"\n";
result++;
}
// int flag = 0;
if (now[3] == '9') {
now[3] = '0';
if (now[2] == '9') {
now[2] = '0';
if (now[1] == '9') {
now[1] = '0';
now[0] += 1;
} else {
now[1] += 1;
}
} else {
now[2] += 1;
}
} else {
now[3] += 1;
}
}
cout<<result;
return 0;
}by __hjwucj__ @ 2023-08-25 09:41:37
#include <bits/stdc++.h>
#define int long long
using namespace std;
int x,y,ans;
int dx (int k)
{
int ans=0;
while (k)
{
ans=ans*10+k%10;
k/=10;
}
return ans;
}
bool hw (int x)
{
int s=dx (x);
if (x==s) return true;
else return false;
}
bool pd (int x)
{
int l=x%10000/100,t=x%10000%100;
if (l>12||l==0) return false;
int a[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
if ((x/10000%4==0&&x/10000%100!=0)||x/10000%400==0) a[2]=29;
if (t>a[l]||t==0) return false;
return true;
}
signed main ()
{
cin>>x>>y;
for (int i=x/10000;i<=y/10000;i++)
for (int j=101;j<=1231;j++)
if (hw (i*10000+j)&&pd (i*10000+j)&&i*10000+j<=y) ans++/*,cout<<i*10000+j<<endl*/;
else if (i*10000+j>y) break;
cout<<ans<<endl;
return 0;
}by wujiawei36 @ 2023-08-30 12:40:38
#include<bits/stdc++.h>
using namespace std;
int month[]= {-1,31,28,31,30,31,30,31,31,30,31,30,31};
bool hw(int a,int b,int c)
{
if(a/1000==c%10 && a/100%10==c/10 &&
a/10%10==b%10 && a%10==b/10)return true;
return false;
}
int main()
{
int date1,date2;
cin>>date1>>date2;
int a1=date1/10000,b1=date1/100%100,c1=date1%100;
int a2=date2/10000,b2=date2/100%100,c2=date2%100;
int ans=0;
for(int a=a1; a<=a2; a++)
{
if(a%400==0||(a%100!=0&&a%4==0))month[2]=29;
else month[2]=28;
for(int b=b1; b<=12; b++)
{
if(b>b2&&a==a2)break;
for(int c=c1; c<=month[b]; c++)
{
if(c>c2&&a==a2&&b==b2)break;
if(hw(a,b,c))
{
ans++;
}
}
}
}
cout<<ans;
return 0;
}