Submission #1357652

#	Time	Username	Problem	Language	Result	Execution time	Memory
1357652		edo	Gift Boxes (EGOI25_giftboxes)	C++20	19 / 100	25 ms	5124 KiB

Main

#include <bits/stdc++.h>

using namespace std;
using ll = long long;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);

  int n, t;
  cin >> t >> n;
  vector<int> a(n), pos(t);
  for (int i = 0; i < n; ++i) {
    cin >> a[i];
    pos[a[i]] = i;
  }

  pair<int, int> ans = {0, n - 1};
  int r = n - 1;
  vector<char> f(t, 0);
  for (int i = n - 1; ~i; i--) {
    if (f[a[i]])
      break;
    f[a[i]] = 1;
    r = i - 1;
  }
  vector<char>(t, 0).swap(f);
  for (int i = 0; i < n; ++i) {
    if (f[a[i]])
      break;
    f[a[i]] = 1;
    int l = i + 1;
    r = max(r, pos[a[i]]);
    if (r - l < ans.second - ans.first)
      ans = {l, r};
  }

  cout << ans.first << " " << ans.second;
  return 0;
}

• Subtask 0: 0 / 0
• Subtask 1: 8 / 8
• Subtask 2: 11 / 11
• Subtask 3: 0 / 14
• Subtask 4: 0 / 21
• Subtask 5: 0 / 22
• Subtask 6: 0 / 24