Submission #1085785

#	Time	Username	Problem	Language	Result	Execution time	Memory
1085785		codexistent	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	36 / 100	1097 ms	2268 KiB

skyscraper

#include <bits/stdc++.h>
using namespace std;
#define FOR(i, a, b) for(int i = a; i <= b; i++)
#define MAXN 30005
 
int n, m, t[MAXN], s, e;
pair<int, int> d[MAXN];
vector<int> p[MAXN];
priority_queue<pair<int, int>> pq;

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

    cin >> n >> m;
    FOR(i, 0, m - 1) t[i] = -1;
    FOR(i, 0, m - 1){
        cin >> d[i].first >> d[i].second;
        if(i == 0) {
            s = d[i].first;
            t[0] = 0;
            pq.push({-t[0], 0});
        }

        if(i == 1) e = d[i].first;
    }
    
    while(pq.size()){
        int v = pq.top().first;
        int pqi = pq.top().second; pq.pop();
        if(t[pqi] != -v) continue;

        // cout << pqi << " " << -v << endl;

        FOR(i, 0, m - 1) if(i != pqi){
            if(abs(d[pqi].first - d[i].first) % d[pqi].second == 0 && (t[i] == -1 || t[pqi] + abs(d[pqi].first - d[i].first) / d[pqi].second < t[i])){
                t[i] = t[pqi] + abs(d[pqi].first - d[i].first) / d[pqi].second;
                pq.push({-t[i], i});
                // cout << " => " << i << " " << t[i] << " " << d[pqi].second << endl;
            }
        }
    }
    
    cout << t[1] << endl;
}

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