Submission #1186340

#	Time	Username	Problem	Language	Result	Execution time	Memory
1186340		Malix	Jakarta Skyscrapers (APIO15_skyscraper)	C++20	100 / 100	482 ms	7352 KiB

skyscraper

#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vii;
typedef pair<int,int> pi;
typedef vector<pi> pii;
typedef tuple<int,int,int> ti;
typedef vector<ll> li;
typedef vector<li> lii;
 
#define REP(i,a,b) for(int i=a;i<b;i++)
#define F first
#define S second
#define PB push_back
#define LSOne(s) ((s)&(-s))
 
ll INF=1000000000000000010;
int inf=1e9+10;
ll M=1e9+7;

int main() {   
// ios::sync_with_stdio(0);
// cin.tie(0);
    int n,m;cin>>n>>m;
    vector<set<int>> b(n);
    int s,e;
    REP(i,0,m){
        int x,y;cin>>x>>y;
        if(i==0)s=x;
        else if(i==1)e=x;
        b[x].insert(y);
    }
    vi dist(n,inf);
    dist[s]=0;
    priority_queue<pi,vector<pi>,greater<pi>> pq;
    pq.push({dist[s],s});
    while(!pq.empty()){
        int x=pq.top().F;
        int y=pq.top().S;
        pq.pop();
        if(dist[y]<x)continue;
        for(auto z:b[y]){
            int tmp=z;
            int c=1;
            while(y+z<n){
                if(dist[y+z]>x+c){
                    dist[y+z]=x+c;
                    pq.push({dist[y+z],y+z});
                }
                z+=tmp;
                c++;
            }
            z=tmp;c=1;
            while(y-z>=0){
                if(dist[y-z]>x+c){
                    dist[y-z]=x+c;
                    pq.push({dist[y-z],y-z});
                }
                z+=tmp;
                c++;
            }
        }
    }
    int ans=dist[e];
    if(ans==inf)cout<<-1;
    else cout<<ans;
}

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