Submission #1288101

#	Time	Username	Problem	Language	Result	Execution time	Memory
1288101		lambd47	Jakarta Skyscrapers (APIO15_skyscraper)	C++20	36 / 100	160 ms	327680 KiB

skyscraper

//#pragma GCC optimize(O3)
#include<bits/stdc++.h>

using namespace std;

#define L(i,j,k) for(int i=(j);i<=(k);i++)
#define R(i,j,k) for(int i=(j);i>=(k);i--)
#define all(v) (v).begin(),(v).end()
#define sz(v) ((int)(v).size())





void solve(){
	int n,m;
	cin>>n>>m;
	vector<vector<int>> adj(m);
	vector<int> pos(m);
	vector<int> pulo(m);
	L(i,0,m-1)cin>>pos[i]>>pulo[i];
	vector<vector<int>> dist(m,vector<int>(m));
	

	L(i,0,m-1){
		L(j,0,m-1){
			if(i==j)continue;
			dist[i][j]=(abs(pos[i]-pos[j])%pulo[i]);
			if(dist[i][j]==0){dist[i][j]=abs((pos[i]-pos[j]))/pulo[i];adj[i].push_back(j);}
		}
	}
	const int MOD=1e9+7;
	vector<int> dp(m,MOD);
	dp[0]=0;
	priority_queue<pair<int,int>,vector<pair<int,int>>,greater<pair<int,int>>> pq;
	pq.push({dp[0],0});
	while(!pq.empty()){
		auto [d,v]=pq.top();
		pq.pop();
		if(d!=dp[v])continue;
		for(auto node:adj[v]){
			if(dp[node]>dp[v]+dist[v][node]){
				dp[node]=dp[v]+dist[v][node];
				pq.push({dp[node],node});
			}
		}
	}	
	
	cout<<((dp[1]==MOD)?-1:dp[1]);
	
}

int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(NULL);
	solve();
}
//fazer um pseudo floyd warshal, na vdd da pra construir um super clique com as distancias de cada um

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