제출 #1165731

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1165731		Tsagana	JJOOII 2 (JOI20_ho_t2)	C++20	100 / 100	4 ms	3016 KiB

ho_t2

#include<bits/stdc++.h>

#define IOS ios_base::sync_with_stdio(false);cin.tie();cout.tie();
#define all(x) x.begin(), x.end()
#define int long long
#define pq priority_queue
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound
#define pb push_back
#define pp pop_back
#define F first
#define S second

using namespace std;

void solve () {
	int n, k;
	string str;
	cin >> n >> k >> str;

	vector<vector<int>> pos(3);
	vector<int> last(4, -1e9);
	map<char, int> id = {{'J', 0}, {'O', 1}, {'I', 2}};
	int ans = 1e9;

	for (int i = 0; i < n; i++) {
		last[0] = i;
		int x = id[str[i]];
		pos[x].pb(last[x]);
		if (pos[x].size() >= k) last[x + 1] = pos[x][pos[x].size() - k];
		ans = min(ans, i - last[3] + 1 - 3 * k);
	}

	if (ans > n) ans = -1;
	cout << ans << '\n';
}
signed main() {IOS solve(); return 0;}

• Subtask 1: 1 / 1
• Subtask 2: 12 / 12
• Subtask 3: 87 / 87