Submission #905728

#	Time	Username	Problem	Language	Result	Execution time	Memory
905728		Muhammad_Aneeq	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	100 / 100	600 ms	3800 KiB

skyscraper

/*
بسم الله الرحمن الرحيم
Author:
                          (:Muhammad Aneeq:)
*/
 
#include <iostream>
#include <set>
#include <queue>
#include <bitset>
using namespace std;
int const M=35000;
int dp[M]={};
void solve()
{
	int n,m;
	cin>>n>>m;
	pair<int,int>a[m];
	vector<int>lo[n];
	for (auto& i:a)
	{
		cin>>i.first>>i.second;
		lo[i.first].push_back(i.second);
	}
	int dp[n]={};
	for (int i=0;i<n;i++)
		dp[i]=1e9+10;
	dp[a[0].first]=0;
	priority_queue<pair<int,int>,vector<pair<int,int>>,greater<pair<int,int>>>pq;
	pq.push({0,a[0].first});
	bitset<30000>vis;
	while (pq.size())
	{
		int loc=pq.top().second;
		pq.pop();
		if (vis[loc])
			continue;
		vis[loc]=1;
		if (loc==a[1].first)
		{
			cout<<(dp[a[1].first]!=1e9+10?dp[a[1].first]:-1)<<endl;
			return;
		}
		for (auto j:lo[loc])
		{
			int z=0;
			for (int k=loc;k>=0;k-=j)
			{
				if (dp[k]>dp[loc]+z&&!vis[k])
				{
					dp[k]=dp[loc]+z;
					pq.push({dp[k],k});
				}
				z++;
			}
			z=0;
			for (int k=loc;k<n;k+=j)
			{
				if (dp[k]>dp[loc]+z&&!vis[k])
				{
					dp[k]=dp[loc]+z;
					pq.push({dp[k],k});
				}
				z++;
			}
		}
	}
	cout<<(dp[a[1].first]!=1e9+10?dp[a[1].first]:-1)<<endl;
}
signed main()
{
  ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
        solve();
}

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