oj.uz

Submission #72740

# Submission time Handle Problem Language Result Execution time Memory
72740 2018-08-26T21:54:18 Z Pajaraja Jakarta Skyscrapers (APIO15_skyscraper) C++17
0 / 100
 5 ms 3376 KB 
#include <bits/stdc++.h>
#define MAXN 30007
using namespace std;
vector<int> g[MAXN],w[MAXN];
set<int> v[MAXN];
bool vi[MAXN];
int dist[MAXN],en;
void dijkstra(int s)
{
	priority_queue<pair<int,int> > pq;
	pq.push(make_pair(0,s));
	while(!pq.empty())
	{
		int u=pq.top().second,d=-pq.top().first;
		pq.pop();
		if(vi[u]) continue;
		dist[u]=d;
		vi[u]=true;
		if(u==en) return;
		for(int i=0;i<g[u].size();i++) if(!vi[g[u][i]]) pq.push(make_pair(-d-w[u][i],g[u][i]));
	}
}
/*bool binarna(int l,int r,int k,int val)
{
	if(r<l) return false;
	int s=(l+r)/2;
	if(v[k][s]==val) return true;
	if(val<v[k][s]) return binarna(l,s-1,k,val);
	return binarna(s+1,r,k,val);
}*/
int main()
{
	int n,m,st,t1,t2;
	scanf("%d%d",&n,&m);
	scanf("%d%d%d%d",&st,&t1,&en,&t2);
	v[st].insert(t1);
	v[en].insert(t2);
	for(int i=0;i<m-2;i++)
	{
		scanf("%d%d",&t1,&t2);
		v[t1].insert(t2);
	}
	for(int i=0;i<n;i++)
	{
		for(set<int>::iterator it=v[i].end();it!=v[i].begin();it--)
		{
			int t=*it,cur=i+t;
			while(cur<n)
			{
				g[i].push_back(cur);
				w[i].push_back((cur-i)/t);
				if(v[cur].find(t)!=v[cur].end()) break;
				cur+=t;
			} 
			cur=i-t;
			while(cur>=0)
			{
				g[i].push_back(cur);
				w[i].push_back((i-cur)/t);
				if(v[cur].find(t)!=v[cur].end()) break;
				cur-=t;
			}
		}
	}
	dijkstra(st);
	if(!vi[en]) dist[en]=-1;
	printf("%d",dist[en]);
}

Compilation message

skyscraper.cpp: In function 'void dijkstra(int)':
skyscraper.cpp:20:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<g[u].size();i++) if(!vi[g[u][i]]) pq.push(make_pair(-d-w[u][i],g[u][i]));
               ~^~~~~~~~~~~~
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:34:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
  ~~~~~^~~~~~~~~~~~~~
skyscraper.cpp:35:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d%d",&st,&t1,&en,&t2);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
skyscraper.cpp:40:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&t1,&t2);
   ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 3064 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 3176 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 3248 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 3376 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 3376 KB Output isn't correct
2 Halted 0 ms 0 KB -