Submission #1086499

#	Time	Username	Problem	Language	Result	Execution time	Memory
1086499		toast12	JJOOII 2 (JOI20_ho_t2)	C++14	0 / 100	0 ms	348 KiB

ho_t2

#include <bits/stdc++.h>
using namespace std;

int main() {
    int n, k;
    cin >> n >> k;
    string s;
    cin >> s;
    int j = 0, o = 0, i = 0;
    for (int idx = 0; idx < n; idx++) {
        if (s[idx] == 'J' && j < k) j++;
        else if (s[idx] == 'O' && j == k && o < k) o++;
        else if (s[idx] == 'I' && j == k && o == k && i < k) i++;
    }
    if (j != k || o != k || i != k) {
        cout << "-1\n";
        return 0;
    }
    int ans1 = 0;
    j = 0, o = 0, i = 0;
    for (int idx = 0; idx < n; idx++) {
        if (j == k && o == k && i == k) break;
        if (s[idx] == 'J' && j < k) j++;
        else if (s[idx] == 'O' && j == k && o < k) o++;
        else if (s[idx] == 'I' && j == k && o == k && i < k) i++;
        else {
            if (j || o || i)
                ans1++;
        }
    }
    int ans2 = 0;
    j = 0, o = 0, i = 0;
    for (int idx = n-1; idx >= 0; idx--) {
        if (j == k && o == k && i == k) break;
        if (s[idx] == 'I' && i < k) i++;
        else if (s[idx] == 'O' && i == k && o < k) o++;
        else if (s[idx] == 'J' && i == k && o == k && j < k) j++;
        else {
            if (j || o || i)
                ans2++;
        }
    }
    cout << min(ans1, ans2) << '\n';
    return 0;
}

• Subtask 1: 0 / 1
• Subtask 2: 0 / 12
• Subtask 3: 0 / 87