Submission #844606

#	Time	Username	Problem	Language	Result	Execution time	Memory
844606		vjudge1	Nivelle (COCI20_nivelle)	C++17	0 / 110	1055 ms	648 KiB

nivelle

#include <bits/stdc++.h>
using namespace std;

#ifdef DEBUG
  #include "/Users/kutay/CP/templates/debug.h"
#else
  #define debug(...) void(38)
#endif

#define int long long

int32_t main() {
  ios_base::sync_with_stdio(0); cin.tie(0);
  int n; cin >> n;
  string s; cin >> s;
  double d = 1e9;
  pair<int, int> ans;
  for (int a = 1; a <= 26; a++) {
    vector<int> m(26);
    int l = 0, r = 0;
    int cnt = 0;
    while (r < n && cnt <= a) {
      m[s[r++] - 'a']++;
      int c = 0;
      for (int x : m) c += (bool) x;
      cnt = c;
      if (c > a) {
        r--;
        break;
      }
    }
    r--;
    if ((double) a / (r - l + 1) - d < -1e-7) {
      d = (double) a / (r - l + 1);
      ans = make_pair(l, r);
    }
    debug(a, l, r, d);
    while (r < n - 1) {
      r++;
      cnt = a;
      while (r < n && cnt <= a + 1) {
        m[s[r++] - 'a']++;
        int c = 0;
        for (int x : m) c += (bool) x;
        cnt = c;
        if (c > a + 1) {
          r--;
          break;
        }
      }
      r--;
      debug(l, r);

      while (l < n && cnt > a) {
        m[s[l++] - 'a']--;
        int c = 0;
        for (int x : m) c += (bool) x;
        cnt = c;
      }
      l--;
      debug(l, r);

      if ((double) a / (r - l + 1) < d) {
        d = (double) a / (r - l + 1);
        ans = make_pair(l, r);
      }
    }
  }
  cout << ans.first + 1 << " " << ans.second + 1 << '\n';
}

• Subtask 1: 0 / 7
• Subtask 2: 0 / 17
• Subtask 3: 0 / 13
• Subtask 4: 0 / 25
• Subtask 5: 0 / 48