Submission #477407

#	Time	Username	Problem	Language	Result	Execution time	Memory
477407		KienTran	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	36 / 100	337 ms	262148 KiB

skyscraper

#include <bits/stdc++.h>

using namespace std;

const int O = 3e5 + 5;
const int N = 2e3 + 5;
const int inf = 1e9;

int n, m, b[O], p[O], d[O];
vector <pair <int, int>> g[O];
vector <int> a[O];

main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    cin >> n >> m;
    for (int i = 1; i <= m; ++ i){
        cin >> b[i] >> p[i];
        a[b[i]].push_back(p[i]);
    }

    for (int i = 0; i < n; ++ i){
        for (int j : a[i]){
            for (int z = i % j; z < n; z += j){
                if (z != i){
                    g[i].push_back({z, abs(i - z) / j});
                }
            }
        }
    }

    for (int i = 0; i < n; ++ i) d[i] = inf;

    priority_queue <pair <int, int>> q;
    q.push({0, b[1]}); d[b[1]] = 0;

    while (q.size()){
        int u = q.top().second;
        int du = -q.top().first;

        q.pop();
        if (d[u] != du) continue;

        for (auto i : g[u]){
            int v = i.first;
            int w = i.second;

            if (d[v] > d[u] + w){
                d[v] = d[u] + w;
                q.push({-d[v], v});
            }
        }
    }

    if (d[b[2]] >= 1e9) d[b[2]] = -1;
    cout << d[b[2]];
}

Compilation message (stderr)

skyscraper.cpp:13:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   13 | main(){
      | ^~~~

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