Submission #442960

#	Time	Username	Problem	Language	Result	Execution time	Memory
442960		Dipto_Debdip	Nivelle (COCI20_nivelle)	C++14	37 / 110	628 ms	524292 KiB

nivelle

#include "bits/stdc++.h"
using namespace std;
#define ll long long int
bool cmp(pair<ll, ll> a, pair<ll, ll> b) {
  return a.second - a.first > b.second - b.first;
}
int main(int argc, char const *argv[]) {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  ll n;
  string s;
  cin >> n;
  cin >> s;
  if (count(s.begin(), s.end(), 'a') + count(s.begin(), s.end(), 'b') == n) {
    ll a = 0, b = 0;
  for (auto i : s) a |= (i == 'a'), b |= (i == 'b');
  ll hor = 0;
  ll cnt = 0;
  ll l = 0, r = 0;
  vector<pair<ll, ll>> v;
  char pre = '$';
  for (ll i = 0; i < n; i++) {
    if (pre == '$') cnt = 1, pre = s[i], l = 0;
    else if (s[i] != pre) {
      r = i - 1;
      v.push_back({l, r});
      l = i;
      pre = s[i];
    }
  }
  v.push_back({l, n - 1});
  sort(v.begin(), v.end(), cmp);
  if (a && b) {
    ll d1 = v[0].second - v[0].first + 1;
    ll d2 = n;
    ll l1 = 1;
    ll l2 = 2;
    if (l1 * d2 > l2 * d1) {
      cout << 1 << " " << n << endl;
    } else {
      cout << v[0].first + 1 << " " << v[0].second + 1;
    }
  } else {
    cout << v[0].first + 1 << " " << v[0].second + 1;
  }
  return 0;
  }
  set<char> st;
  vector<pair<pair<ll, ll>, pair<ll, ll>>> v;
  //ll l2 = 10000, d2 = 10000;
  for (ll i = 0; i < n; i++) {
    map<char, ll> mp;
    ll l1 = 0, l2 = 0;
    st.insert(s[i]);
    for (ll j = i; j < n; j++) {
      if (!mp[s[j]]) {
        l1++;
        mp[s[j]]++;
      }
      l2++;
      v.push_back({{i, j}, {l1, l2}});
    }
  }
  ll l, r;
  ll c1 = 10000, c2 = 10000;
  for (auto i : v) {
    ll h1 = i.second.first;
    ll h2 = i.first.second - i.first.first + 1;
    if (c1 * h2 > h1 * c2) {
      l = i.first.first + 1;
      r = i.first.second + 1;
      c1 = h1;
      c2 = h2;
    }
  }
  if (st.size() == n) cout << "1 1" << endl;
  else cout << l << " " << r << endl;
  return 0;
}

Compilation message (stderr)

nivelle.cpp: In function 'int main(int, const char**)':
nivelle.cpp:17:6: warning: unused variable 'hor' [-Wunused-variable]
   17 |   ll hor = 0;
      |      ^~~
nivelle.cpp:18:6: warning: variable 'cnt' set but not used [-Wunused-but-set-variable]
   18 |   ll cnt = 0;
      |      ^~~
nivelle.cpp:76:17: warning: comparison of integer expressions of different signedness: 'std::set<char>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   76 |   if (st.size() == n) cout << "1 1" << endl;
      |       ~~~~~~~~~~^~~~

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