Submission #1091698

#	Time	Username	Problem	Language	Result	Execution time	Memory
1091698		LucaLucaM	Election (BOI18_election)	C++17	28 / 100	3032 ms	1872 KiB

election

#include <iostream>
#include <vector>
#include <algorithm>
#include <cassert>
#warning That's not the baby, that's my baby

#define debug(x) #x << " = " << x << '\n'
using ll = long long;

const int INF = 1e9;

int main() {
  std::ios_base::sync_with_stdio(false);
  std::cin.tie(0);
  std::cout.tie(0);
  #ifdef LOCAL
freopen("input.txt", "r", stdin);
  #endif

  int n;
  std::cin >> n;
  
  std::string s;
  std::cin >> s;
  s = '$' + s;

  std::vector<int> pref(n + 1, 0);
  for (int i = 1; i <= n; i++) {
    if (s[i] == 'C') {
      pref[i] = pref[i - 1] + 1;
    } else {
      pref[i] = pref[i - 1] - 1;
    }
  }

  int q;
  std::cin >> q;
  while (q--) {
    int l, r;
    std::cin >> l >> r;
    int answer = INF;
    int mini = INF;
    for (int i = l - 1; i <= r; i++) {
      mini = std::min(mini, pref[i] - pref[l - 1]);
      answer = std::min(answer, pref[r] - pref[i] + mini);      
    }
    std::cout << -answer << '\n';
    
  }

  return 0;
}

Compilation message (stderr)

election.cpp:5:2: warning: #warning That's not the baby, that's my baby [-Wcpp]
    5 | #warning That's not the baby, that's my baby
      |  ^~~~~~~

• Subtask 1: 28 / 28
• Subtask 2: 0 / 54
• Subtask 3: 0 / 18