Submission #936509

#	Time	Username	Problem	Language	Result	Execution time	Memory
936509		tamir1	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	22 / 100	11 ms	1368 KiB

skyscraper

#include<bits/stdc++.h>
#define ll int
#define ff first
#define ss second
using namespace std;
ll n,m,i,j,b,p,x,y,R;
vector<ll> v[30005];
map<ll,ll> mp;
set<pair<ll,ll>> q;
int main(){
	ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin >> n >> m;
	for(i=0;i<m;i++){
		cin >> b >> p;
		v[b].push_back(p);
		if(i==0) q.insert({0,b});
		if(i==1) R=b;
	}
	vector<ll> dist(n,1e9);
	dist[0]=0;
	while(!q.empty()){
		pair<ll,ll> z=*q.begin();
		x=z.ss;
		y=z.ff;
		q.erase(q.begin());
		for(ll i:v[x]){
			p=0;
			for(b=x+i;b<n;b+=i){
				p++;
				if(dist[b]>y+p){
					dist[b]=y+p;
					q.insert({y+p,b});
				}
			}
			p=0;
			for(b=x-i;b>=0;b-=i){
				p++;
				if(dist[b]>y+p){
					dist[b]=y+p;
					q.insert({y+p,b});
				}
			}
		}
	}
	if(dist[R]!=1e9) cout << dist[R];
	else cout << -1;
}

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