Submission #339606

#	Time	Username	Problem	Language	Result	Execution time	Memory
339606		eyangch	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	57 / 100	1097 ms	2668 KiB

skyscraper

#include <bits/stdc++.h>

using namespace std;

struct loc{int x; int doge; int d; bool r;};

int N, M;
int b[30000], p[30000];
vector<int> graph[30000];
int dist[30000];

signed main(){
    cin >> N >> M;
    for(int i = 0; i < M; i++){
        cin >> b[i] >> p[i];
        graph[b[i]].push_back(i);
    }
    fill(dist, dist+N, -1);
    deque<loc> q;
    q.push_back({b[0], 0, 0, true});
    q.push_back({b[0], 0, 0, false});
    while(!q.empty()){
        if(~dist[b[1]]) break;
        int x = q.front().x, doge = q.front().doge, d = q.front().d;
        bool r = q.front().r;
        q.pop_front();
        if(x < 0 || x >= N) continue;
        if(!(~dist[x])){
            dist[x] = d;
            for(int i : graph[x]){
                if(i != doge){
                    q.push_front({x, i, d, true});
                    q.push_front({x, i, d, false});
                }
            }
        }
        int dv = p[doge];
        if(!r) dv = -dv;
        q.push_back({x+dv, doge, d+1, r});
    }
    cout << dist[b[1]] << endl;
}

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