Submission #991376

#	Time	Username	Problem	Language	Result	Execution time	Memory
991376		gmroh06	Toilets (JOI16_toilets)	C++14	100 / 100	17 ms	5656 KiB

toilets

#include <bits/stdc++.h>

using namespace std;
using ll = long long;

inline void fastio() {
    std::ios_base::sync_with_stdio(false);
    std::cin.tie(nullptr);
    std::cout.tie(nullptr);
}

ll n, m, ans, sum;
stack<pair<string, ll>> s;

int main() {
    fastio();

    cin >> n >> m;

    while (m--) {
        string str; ll t;

        cin >> str >> t;

        s.emplace(str, t);
    }

    while (!s.empty()) {
        auto [str, k] = s.top();
        s.pop();

        ll mx = 0, tmp = 0;

        for (auto it = str.end() - 1; it >= str.begin(); it--) {
            tmp += *it == 'M' ? 1 : -1;
            mx = max(mx, tmp);
        }

        ans = max({ans, sum + (k - 1) * tmp + mx - 1, sum + mx - 1});
        sum += k * tmp;
    }

    cout << (sum > 0 ? -1 : ans);

    return 0;
}

Compilation message (stderr)

toilets.cpp: In function 'int main()':
toilets.cpp:29:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   29 |         auto [str, k] = s.top();
      |              ^

• Subtask 1: 14 / 14
• Subtask 2: 22 / 22
• Subtask 3: 64 / 64