제출 #958202

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
958202		riariti	Palembang Bridges (APIO15_bridge)	C++17	22 / 100	27 ms	7896 KiB

bridge

#line 1 "Palembang_Bridges.cpp"
#include <bits/stdc++.h>

#ifdef local
#define dbg(__VA_ARGS__)                                                       \
    std::cerr << "[DBG|" << __LINE__ << "]: " << __VA_ARGS__ << std::endl;
#define cerr(__VA_ARGS__) std::cerr << __VA_ARGS__;
#else
#define dbg(...)
#define cerr(...)
#endif

const auto vec_out = [](const std::vector<int> &cc) {
    dbg("vector: ");
    for (auto x : cc) {
        cerr(x << " ");
    }
    cerr("\n");
};

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

    int K, N;
    std::cin >> K >> N;
    std::vector<std::tuple<char, std::int64_t, char, std::int64_t>> PSQT(N);
    for (auto &[P, S, Q, T] : PSQT) {
        std::cin >> P >> S >> Q >> T;
    }

    std::int64_t ans = 0;
    std::vector<std::pair<std::int64_t, std::int64_t>> HW;
    for (auto [P, S, Q, T] : PSQT) {
        if (P == Q) {
            ans += std::abs(T - S);
            continue;
        }

        HW.emplace_back(S, T);
    }

    auto f = [&](int x) {
        std::int64_t ans = 0;
        for (auto [S, T] : HW) {
            // +1 for bridge
            ans += std::abs(S - x) + std::abs(T - x) + 1;
        }

        return ans;
    };

    std::int64_t l = 0, r = 1'000'000'001;
    while (l <= r) {
        auto m = l + (r - l) / 2;

        if (!(f(m) <= f(m + 1))) {
            l = m + 1;
        } else {
            r = m - 1;
        }
    }
    ans += f(l);

    std::cout << ans << "\n";

    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

Palembang_Bridges.cpp: In lambda function:
Palembang_Bridges.cpp:14:15: warning: unused variable 'x' [-Wunused-variable]

• Subtask 1: 8 / 8
• Subtask 2: 14 / 14
• Subtask 3: 0 / 9
• Subtask 4: 0 / 32
• Subtask 5: 0 / 37