Submission #695114

#	Time	Username	Problem	Language	Result	Execution time	Memory
695114		Abito	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	36 / 100	1082 ms	65480 KiB

skyscraper

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define F first
#define S second
#define int long long
const int N=3e4+5;
int a[N],b[N],n,m,dis[N];
vector<pair<int,int>> adj[N];
priority_queue<pair<int,int>> pq;
bool vis[N];
void dijkstra(){
    pq.push({0,0});
    while (!pq.empty()){
        pair<int,int> x=pq.top();
        x.F*=-1;
        pq.pop();
        if (vis[x.S]) continue;
        vis[x.S]=true;
        for (auto u:adj[x.S]){
            if (dis[u.F]<=x.F+u.S) continue;
            dis[u.F]=x.F+u.S;
            pq.push({-dis[u.F],u.F});
        }
    }return;
}
int32_t main(){
    cin>>n>>m;
    for (int i=1;i<N;i++) dis[i]=INT_MAX;
    for (int i=0;i<m;i++) cin>>a[i]>>b[i];
    for (int i=0;i<m;i++){
        for (int j=0;j<m;j++){
            if (i==j) continue;
            if (abs(a[i]-a[j])%b[i]) continue;
            adj[i].pb({j,abs(a[i]-a[j])/b[i]});
            //cout<<i<<' '<<j<<' '<<abs(a[i]-a[j])/b[i]<<endl;
        }
    }
    dijkstra();
    if (dis[1]==INT_MAX) cout<<-1<<endl;
    else cout<<dis[1]<<endl;
    return 0;
}

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