Submission #447050

#	Time	Username	Problem	Language	Result	Execution time	Memory
447050		grt	Nivelle (COCI20_nivelle)	C++17	110 / 110	43 ms	716 KiB

nivelle

#include <bits/stdc++.h>
#define PB push_back
#define ST first
#define ND second
#define _ ios_base::sync_with_stdio(0); cin.tie(0);
//mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());

using namespace std;

using ll = long long;
using pi = pair<int,int>;
using vi = vector<int>;

const int INF = 1e9;
int n;
string s;
int cnt[26];
pi ans = {INF, 1};
pi res;

int main() {_
	cin >> n >> s;
	for(int d = 1; d <= 26; ++d) {
		for(int i = 0; i < 26; ++i) cnt[i] = 0;
		int j = -1;
		int mx_len = 0;
		pi best = {-1,-1};
		int dif = 0;
		for(int i = 0; i < n; ++i) {
			while(j + 1 < n && dif + (cnt[s[j + 1] - 'a'] == 0) <= d) {
				cnt[s[j + 1] - 'a']++;
				dif += (cnt[s[j + 1] - 'a'] == 1);
				j++;
			}
			mx_len = max(mx_len, j - i + 1);
			if(mx_len == j - i + 1) {
				best = {i, j};
			}
			cnt[s[i] - 'a']--;
			dif -= (cnt[s[i] - 'a'] == 0);
		}
		//~ cout << d << " " << mx_len << "\n";
		if((ll)ans.ST * mx_len > (ll)ans.ND * d) {
			ans = {d, mx_len};
			res = best;
		}
	}
	cout << res.ST + 1 << " " << res.ND + 1;
}

• Subtask 1: 7 / 7
• Subtask 2: 17 / 17
• Subtask 3: 13 / 13
• Subtask 4: 25 / 25
• Subtask 5: 48 / 48