제출 #501036

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
501036		600Mihnea	Miners (IOI07_miners)	C++17	0 / 100	41 ms	588 KiB

miners

#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(0); cin.tie(0);

  //freopen ("input", "r", stdin);

  int n;
  string s;
  cin >> n >> s;

  function<int(deque<int>)> eval = [&] (deque<int> d) {
    set<int> F;
    for (auto &x : d) {
      F.insert(x);
    }
    return (int) F.size();
  };

  int sol = 0;
  deque<int> a, b;

  for (int i = 1; i <= n; i++) {
    if ((int) a.size() == 3) a.pop_front();
    if ((int) b.size() == 3) b.pop_front();
    char ch = s[i - 1];
    a.push_back(ch);
    b.push_back(ch);

    int X = eval(a);
    int Y = eval(b);

    if (X > Y) {
      b.pop_back();
      sol += X;
    } else {
      sol += Y;
      a.pop_back();
    }

  }

  cout << sol << "\n";
  return 0;
}

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