제출 #1037684

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1037684		stdfloat	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	10 / 100	1 ms	424 KiB

skyscraper

#include <bits/stdc++.h>
using namespace std;

using ll = long long;

#define ff  first
#define ss  second
#define pii pair<int, int>

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

    int n, m;
    cin >> n >> m;

    int tx;
    vector<int> p(n), dis(n, INT_MAX);
    priority_queue<pii> q;
    for (int i = 0; i < m; i++) {
        int x, y;
        cin >> x >> y;

        p[x] = y;

        if (!i) {
            dis[x] = 0;
            q.push({0, x});
        }
        else if (i == 1) tx = x;
    }

    while (!q.empty()) {
        auto [d, x] = q.top(); d = -d; q.pop();

        if (d != dis[x]) continue;

        for (int i = x; i < n; i += p[x]) {
            if (p[i] && d + abs(i - x) / p[x] < dis[i]) {
                dis[i] = d + abs(i - x) / p[x];
                q.push({-dis[i], i});
            }
        }
        for (int i = x; i >= 0; i -= p[x]) {
            if (p[i] && d + abs(i - x) / p[x] < dis[i]) {
                dis[i] = d + abs(i - x) / p[x];
                q.push({-dis[i], i});
            }
        }
    }

    cout << (dis[tx] == INT_MAX ? -1 : dis[tx]);
}

컴파일 시 표준 에러 (stderr) 메시지

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:51:20: warning: 'tx' may be used uninitialized in this function [-Wmaybe-uninitialized]
   51 |     cout << (dis[tx] == INT_MAX ? -1 : dis[tx]);
      |                    ^

• Subtask 1: 10 / 10
• Subtask 2: 0 / 12
• Subtask 3: 0 / 14
• Subtask 4: 0 / 21
• Subtask 5: 0 / 43