Submission #1044573

#	Time	Username	Problem	Language	Result	Execution time	Memory
1044573		juicy	JOIOJI (JOI14_joioji)	C++17	100 / 100	32 ms	5980 KiB

joioji

#include <bits/stdc++.h>

using namespace std;

#ifdef LOCAL
#include "debug.h"
#else
#define debug(...) 42
#endif

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

    int n; cin >> n;
    map<array<int, 2>, int> mp;
    mp[{0, 0}] = 0;
    array<int, 2> dif{};
    int res = 0;
    for (int i = 1; i <= n; ++i) {
        char c; cin >> c;
        if (c == 'J') {
            ++dif[0], ++dif[1];
        } else if (c == 'O') {
            --dif[0];
        } else {
            --dif[1];
        }
        if (mp.count({dif[0], dif[1]})) {
            res = max(res, i - mp[{dif[0], dif[1]}]);
        } else {
            mp[{dif[0], dif[1]}] = i;
        }
    }
    cout << res;
    return 0;
}

• Subtask 1: 5 / 5
• Subtask 2: 15 / 15
• Subtask 3: 80 / 80