Submission #335246

#	Time	Username	Problem	Language	Result	Execution time	Memory
335246		ronnith	Datum (COCI20_datum)	C++14	40 / 50	1079 ms	528 KiB

datum

#include <bits/stdc++.h>
#define all(a) (a).begin(), (a).end()
using namespace std;

// char ss[100];

bool pal(string a){
	int n = a.size();
	for(int i = 0;i < 8;i ++){
		if(a[i] != a[n - i - 1])return false;
	}
	return true;
}

bool cmp(string a, string b){
	int dd1 = (a[0] - '0') * 10 + (a[1] - '0');
	int mm1 = (a[3] - '0') * 10 + (a[4] - '0');
	int yy1 = (a[6] - '0') * 1000 + (a[7] - '0') * 100 + (a[8] - '0') * 10 + (a[9] - '0');

	int dd2 = (b[0] - '0') * 10 + (b[1] - '0');
	int mm2 = (b[3] - '0') * 10 + (b[4] - '0');
	int yy2 = (b[6] - '0') * 1000 + (b[7] - '0') * 100 + (b[8] - '0') * 10 + (b[9] - '0');

	if(yy1 == yy2){
		if(mm1 == mm2)return dd1 < dd2;
		return mm1 < mm2;
	}
	return yy1 < yy2;
}

int m1[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
int m2[12] = {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

bool valid(string a, bool leap){
	int dd = (a[0] - '0') * 10 + (a[1] - '0');
	int mm = (a[2] - '0') * 10 + (a[3] - '0');
	// cerr << "dd : " << dd << " " << "mm : " << mm << '\n';
	if(leap){
		if(mm > 0 and mm <= 12 and dd > 0 and dd <= m2[mm - 1])return true;
	} else {
		if(mm > 0 and mm <= 12 and dd > 0 and dd <= m1[mm - 1])return true;
	}
	return false;
}

int main(){
	ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	int tt;
	cin >> tt;
	while(tt --){
		string s;
		cin >> s;
		int dd = (s[0] - '0') * 10 + (s[1] - '0');
		int mm = (s[3] - '0') * 10 + (s[4] - '0');
		int yy = (s[6] - '0') * 1000 + (s[7] - '0') * 100 + (s[8] - '0') * 10 + (s[9] - '0');
		for(;yy <= 9999;yy ++){
			stringstream ss;
			ss << (yy / 1000) % 10 << (yy / 100) % 10 << (yy / 10) % 10 << yy % 10;
			string S = ss.str();
			reverse(all(S));
			if(valid(S, yy % 4 == 0)){
				stringstream ans;
				ans << S[0] << S[1] << '.' <<  S[2] << S[3] << '.' << (yy / 1000) % 10 << (yy / 100) % 10 << (yy / 10) % 10 << yy % 10 << '.';
				if(cmp(s, ans.str())){
					cout << ans.str() << '\n';
					break;
				}
			}
			// for(int i = mm;i <= 12;i ++){
			// 	bool done = false;
			// 	for(int j = ((i == mm)?dd:1);j <= ((yy % 4 == 0)?m2[i - 1]:m1[i - 1]);j ++){
			// 		stringstream ss;
			// 		ss << j / 10 << j % 10 << i / 10 << i % 10 << (yy / 1000) % 10 << (yy / 100) % 10 << (yy / 10) % 10 << yy % 10;
			// 		// cerr << ss.str() << '\n';
			// 		if(pal(ss.str())){
			// 			// cerr << "yes";
			// 			done = true;
			// 			stringstream ans;
			// 			ans << j / 10 << j % 10 << '.' <<  i / 10 << i % 10 << '.' << (yy / 1000) % 10 << (yy / 100) % 10 << (yy / 10) % 10 << yy % 10 << '.';
			// 			cout << ans.str() << '\n';
			// 			break;
			// 		}
			// 	}
			// 	if(done)break;
			// }
		}
		// for(int i = dd + 1;i <= 31;i ++){
			
		// }
	}
	return 0;
}

Compilation message (stderr)

datum.cpp: In function 'int main()':
datum.cpp:53:7: warning: unused variable 'dd' [-Wunused-variable]
   53 |   int dd = (s[0] - '0') * 10 + (s[1] - '0');
      |       ^~
datum.cpp:54:7: warning: unused variable 'mm' [-Wunused-variable]
   54 |   int mm = (s[3] - '0') * 10 + (s[4] - '0');
      |       ^~

• Subtask 1: 40 / 50