Submission #1023735

#	Time	Username	Problem	Language	Result	Execution time	Memory
1023735		vjudge1	JJOOII 2 (JOI20_ho_t2)	C++17	13 / 100	2068 ms	860 KiB

ho_t2

#include "bits/stdc++.h"
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define ordered_set tree <int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update>
#define nemeshay ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
#define allr(pon) pon.rbegin(), pon.rend()
#define all(pon) pon.begin(), pon.end()
#define nosolve cout << "-1\n"
#define YES cout << "YES\n"
#define Yes cout << "Yes\n"
#define pii pair <int, int>
#define OK cout << "OK\n"
#define Ok cout << "Ok\n"
#define NO cout << "NO\n"
#define No cout << "No\n"
#define pf push_front
#define int long long
#define pb push_back
#define sigma signed
#define sc second
#define fr first
using namespace __gnu_pbds;
using namespace std;
const int N = 1e6 + 20, INF = 1e16 + 7;
int dp[N];
sigma main(){
    nemeshay
    string s;
    int n, k, ans = INF;
    cin >> n >> k >> s;
    for (int i = 0; i < n; i++) {
        if (s[i] == 'J') {
            int l = i, r, cntj = 0, cnto = 0, cnti = 0;
            for (int j = i; j < n; j++) {
                if (s[j] == 'J') cntj++;
                if (s[j] == 'O' && cntj >= k) cnto++;
                if (s[j] == 'I' && cnto >= k && cntj >= k) cnti++;
                if (cnti == k) {
                    r = j;
                    break;
                }
            }
            if (cntj >= k && cnto >= k && cnti >= k) ans = min(ans, r - l + 1 - 3 * k);
        }
    }
    if (ans == INF) ans = -1;
    cout << ans;
}

Compilation message (stderr)

ho_t2.cpp: In function 'int main()':
ho_t2.cpp:43:71: warning: 'r' may be used uninitialized in this function [-Wmaybe-uninitialized]
   43 |             if (cntj >= k && cnto >= k && cnti >= k) ans = min(ans, r - l + 1 - 3 * k);
      |                                                                     ~~^~~

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