Submission #226883

#	Time	Username	Problem	Language	Result	Execution time	Memory
226883		bharat2002	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	100 / 100	493 ms	38764 KiB

skyscraper

/*input
5 3
0 2
1 1
4 1
*/
#include<bits/stdc++.h>
using namespace std;
const int N=3e5 + 100;
const int mod=1e9 + 7;
#define int long long
const int inf=1e18;
#define pii pair<int, int>
#define f first
#define s second 
#define mp make_pair
#define FOR(i, n) for(int i=1;i<=n;i++)
#define TRACE(x) cerr << #x << " = " << x << endl 
//Trace prints the name of the variable and the value.
set<int> doges[N];
int src, tar, dist[N];
priority_queue< pii, vector< pii >, greater<pii> > pq;
set<int> visited[N];
signed main()
{
	ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
	int n, m;cin>>n>>m;
	for(int i=0;i<n;i++) dist[i]=inf;
	for(int i=0;i<m;i++)
	{
		int b, p;cin>>b>>p;
		if(i==0) src=b;
		if(i==1) tar=b;
		doges[b].insert(p);
	}
	pq.push(mp(0, src));dist[src]=0;
	while(!pq.empty())
	{
		pii cur=pq.top();pq.pop();
		if(cur.f>dist[cur.s]) continue;
		for(auto i:doges[cur.s])
		{
			int moves=0;
			for(int j=cur.s+i;j<n;j+=i)
			{
				moves++;
				if(dist[j]>cur.f + moves)
				{
					dist[j]=cur.f + moves;pq.push(mp(dist[j], j));
				}
			}
			moves=0;
			for(int j=cur.s-i;j>=0;j-=i)
			{
				moves++;
				if(dist[j]>cur.f + moves)
				{
					dist[j]=cur.f + moves;pq.push(mp(dist[j], j));
				}
			}
		}
	}
	if(dist[tar]==inf) cout<<-1;
	else cout<<dist[tar];
}

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