提出 #74624547

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ソースコード 拡げる

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

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
    
    int n, g, f; cin >> n >> g >> f;
    vector<pair<int, int>> stations(n);
    for (int i = 0;i < n; i++) {
        cin >> stations[i].first >> stations[i].second;
    }

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

    int fuel = f;
    int pos = 0;
    int count = 0;

    priority_queue<int> pq;
    int idx = 0;

    stations.push_back({g, 0});

    for (auto [next_pos, next_fuel]: stations) {
        int dist = next_pos - pos;

        while (fuel < dist && !pq.empty()) {
            fuel += pq.top();
            pq.pop();
            count++;
        }

        if (fuel < dist) {
            cout << -1 << '\n';
            return 0;
        }

        fuel -= dist;
        pos = next_pos;

        if (next_fuel > 0) {
            pq.push(next_fuel);
        }
    }

    cout << count << '\n';
}

提出情報

コンパイルエラー

./Main.cpp: In function 'int main()':
./Main.cpp:22:9: warning: unused variable 'idx' [-Wunused-variable]
   22 |     int idx = 0;
      |         ^~~

ジャッジ結果