제출 #994241

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
994241		vjudge1	Sightseeing in Kyoto (JOI22_kyoto)	C++17	0 / 100	6 ms	8284 KiB

kyoto

#include <algorithm>
#include <climits>
#include <iostream>
#include <vector>

using namespace std;

using ll = long long;

struct s {
    ll pos, value;

    bool operator <(s const& rhs) const {
        return pos < rhs.pos;
    }
};

ll solve(vector<s> const& a, vector<s> const& b) {
    vector dp(a.size(), vector<ll>(b.size(), LLONG_MAX / 3));
    dp[0][0] = 0;

    for (int i = 0; i < a.size(); i++) {
        for (int j = 0; j < b.size(); j++) {
            if (i < a.size() - 1)
                dp[i + 1][j] = min(dp[i + 1][j], dp[i][j] + b[j].value * (a[i + 1].pos - a[i].pos));
            
            if (j < b.size() - 1)
                dp[i][j + 1] = min(dp[i][j + 1], dp[i][j] + a[i].value * (b[j + 1].pos - b[j].pos));
        }
    }

    return dp.back().back();
}

vector<s> compress(vector<s> const& a) {
    vector<s> ret;

    ll left_min = LLONG_MAX / 3;
    ll right_min = LLONG_MAX / 3;

    ll l = 0;
    ll r = a.size() - 1;

    while (l <= r) {
        if (a[l].value > a[r].value) {
            if (a[l].value < left_min) {
                ret.push_back(a[l]);
                left_min = a[l].value;
            }

            l++;
        }
        else {
            if (a[r].value < right_min || r == 0) {
                ret.push_back(a[r]);
                right_min = a[r].value;
            }

            r--;
        }
    }

    sort(ret.begin(), ret.end());

    return ret;
}

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

    ll h, w;
    cin >> h >> w;

    vector<s> a(h);
    for (int i = 0; i < h; i++) {
        a[i].pos = i;
        cin >> a[i].value;
    }

    vector<s> b(w);
    for (int i = 0; i < w; i++) {
        b[i].pos = i;
        cin >> b[i].value;
    }

    a = compress(a);
    b = compress(b);

    cout << solve(a, b) << "\n";
}

컴파일 시 표준 에러 (stderr) 메시지

kyoto.cpp: In function 'll solve(const std::vector<s>&, const std::vector<s>&)':
kyoto.cpp:22:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<s>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |     for (int i = 0; i < a.size(); i++) {
      |                     ~~^~~~~~~~~~
kyoto.cpp:23:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<s>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |         for (int j = 0; j < b.size(); j++) {
      |                         ~~^~~~~~~~~~
kyoto.cpp:24:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<s>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |             if (i < a.size() - 1)
      |                 ~~^~~~~~~~~~~~~~
kyoto.cpp:27:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<s>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |             if (j < b.size() - 1)
      |                 ~~^~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 30
• Subtask 3: 0 / 60