제출 #495338

#제출 시각아이디문제언어결과실행 시간메모리
495338600MihneaMonochrome Points (JOI20_monochrome)C++17
35 / 100
2054 ms4564 KiB
#include <bits/stdc++.h> using namespace std; typedef long long ll; const int N = 400000 + 7; int n; string s; int main() { ios::sync_with_stdio(0); cin.tie(0); ///freopen ("input", "r", stdin); cin >> n >> s; vector<int> a, b; for (int i = 0; i < 2 * n; i++) { if (s[i] != s[0]) { a.push_back(i); } else { b.push_back(i); } } vector<ll> cnt(n); for (int i = 0; i < n; i++) { for (int j = 0; j < n; j++) { if (a[i] < b[j]) { cnt[(n - i + j) % n] += min(b[j] - a[i] - 1, 2 * (n - 1) - (b[j] - a[i] - 1)); } } for (int j = 0; j < n; j++) { if (a[i] > b[j]) { cnt[(n - i + j) % n] += min(a[i] - b[j] - 1, 2 * (n - 1) - (a[i] - b[j] - 1)); } } } ll sol = 0; for (auto& x : cnt) { sol = max(sol, x); } cout << sol / 2 << "\n"; }
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