oj.uz

Submission #77028

# Submission time Handle Problem Language Result Execution time Memory
77028 2018-09-20T07:11:32 Z vex Jakarta Skyscrapers (APIO15_skyscraper) C++14
36 / 100
 711 ms 263168 KB 
#include <bits/stdc++.h>
#define maxn 30005
#define pii pair<int,int>
#define f first
#define s second
using namespace std;
 
int n,m;
pii dg[maxn];
vector<int>p[maxn];
 
vector<pii>adj[maxn];
priority_queue<pii>pq;
int dis[maxn];
bool bio[maxn];
 
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
 
    cin>>n>>m;
    int s;
    int e;
    for(int i=0;i<m;i++)
    {
        int x,y;
        cin>>x>>y;
        dg[i].f=x;
        dg[i].s=y;
        if(i==0)s=x;
        if(i==1)e=x;
        p[y].push_back(x);
    }
    for(int i=1;i<n;i++)sort(p[i].begin(),p[i].end());
    for(int i=0;i<m;i++)
    {
	int pp=0;
      	int sz=p[dg[i].s].size();
      	while(p[dg[i].s][pp]!=dg[i].f)pp++;
 
	int up=pp+1;
      	for(int j=dg[i].f+dg[i].s;j<n;j+=dg[i].s)
        {
          	while(up<sz && p[dg[i].s][up]<j)up++;
          	adj[dg[i].f].push_back({j,(j-dg[i].f)/dg[i].s});
          	if(up<sz && p[dg[i].s][up]==j)break; 
        }
      	
      	pp--;
      	for(int j=dg[i].f-dg[i].s;j>=0;j-=dg[i].s)
        {
          	while(pp>=0 && p[dg[i].s][pp]>j)pp--;
            adj[dg[i].f].push_back({j,(dg[i].f-j)/dg[i].s});
            if(pp>=0 && p[dg[i].s][pp]==j)break; 
        }
    }
    
    /*for(int i=0;i<n;i++)
    {
    	cout<<i<<"   ";
    	for(auto x:adj[i])cout<<x.f<<","<<x.s<<" ";
    	cout<<endl;
    }*/
 
    if(e==s)
    {
        cout<<"0"<<endl;
        return 0;
    }
 
    for(int i=0;i<n;i++)
    {
        dis[i]=maxn*maxn+55;
        bio[i]=false;
    }
    pq.push({0,s});
    dis[s]=0;
 
    while(!pq.empty())
    {
        int v=pq.top().second;
        pq.pop();
      	if(v==e)
        {
          cout<<dis[e]<<endl;
          return 0;
        }
        if(bio[v])continue;
        bio[v]=true;
 
        for(auto x:adj[v])
        {
    		int u=x.f;
          	int w=x.s;
          	if(dis[u]>dis[v]+w)
            {
              	dis[u]=dis[v]+w;
              	pq.push({-dis[u],u});
            }
        }
    }
 
    cout<<"-1"<<endl;
    return 0;
}

Compilation message

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:85:8: warning: 'e' may be used uninitialized in this function [-Wmaybe-uninitialized]
        if(v==e)
        ^~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 1784 KB Output is correct
2 Correct 3 ms 1864 KB Output is correct
3 Correct 3 ms 1864 KB Output is correct
4 Correct 3 ms 1864 KB Output is correct
5 Correct 3 ms 1864 KB Output is correct
6 Correct 3 ms 1864 KB Output is correct
7 Correct 3 ms 1864 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1992 KB Output is correct
2 Correct 3 ms 1992 KB Output is correct
3 Correct 3 ms 1992 KB Output is correct
4 Correct 3 ms 1992 KB Output is correct
5 Correct 3 ms 1992 KB Output is correct
6 Correct 3 ms 1992 KB Output is correct
7 Correct 3 ms 1992 KB Output is correct
8 Correct 3 ms 1992 KB Output is correct
9 Correct 4 ms 2120 KB Output is correct
10 Correct 3 ms 2120 KB Output is correct
11 Correct 4 ms 2120 KB Output is correct
12 Correct 12 ms 4208 KB Output is correct
13 Correct 7 ms 4208 KB Output is correct
14 Correct 4 ms 4208 KB Output is correct
15 Correct 4 ms 4208 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4208 KB Output is correct
2 Correct 3 ms 4208 KB Output is correct
3 Correct 3 ms 4208 KB Output is correct
4 Correct 3 ms 4208 KB Output is correct
5 Correct 3 ms 4208 KB Output is correct
6 Correct 3 ms 4208 KB Output is correct
7 Correct 3 ms 4208 KB Output is correct
8 Correct 3 ms 4208 KB Output is correct
9 Correct 3 ms 4208 KB Output is correct
10 Correct 4 ms 4208 KB Output is correct
11 Correct 4 ms 4208 KB Output is correct
12 Correct 11 ms 4308 KB Output is correct
13 Correct 7 ms 4308 KB Output is correct
14 Correct 4 ms 4308 KB Output is correct
15 Correct 4 ms 4308 KB Output is correct
16 Correct 3 ms 4308 KB Output is correct
17 Correct 5 ms 4308 KB Output is correct
18 Correct 4 ms 4308 KB Output is correct
19 Correct 3 ms 4308 KB Output is correct
20 Correct 5 ms 4308 KB Output is correct
21 Correct 3 ms 4308 KB Output is correct
22 Correct 3 ms 4308 KB Output is correct
23 Correct 4 ms 4308 KB Output is correct
24 Correct 5 ms 4308 KB Output is correct
25 Correct 4 ms 4308 KB Output is correct
26 Correct 88 ms 35544 KB Output is correct
27 Correct 80 ms 35544 KB Output is correct
28 Correct 5 ms 35544 KB Output is correct
29 Correct 6 ms 35544 KB Output is correct
30 Correct 4 ms 35544 KB Output is correct
31 Correct 5 ms 35544 KB Output is correct
32 Correct 5 ms 35544 KB Output is correct
33 Correct 7 ms 35544 KB Output is correct
34 Correct 7 ms 35544 KB Output is correct

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 35544 KB Output is correct
2 Correct 3 ms 35544 KB Output is correct
3 Correct 4 ms 35544 KB Output is correct
4 Correct 4 ms 35544 KB Output is correct
5 Correct 4 ms 35544 KB Output is correct
6 Correct 3 ms 35544 KB Output is correct
7 Correct 3 ms 35544 KB Output is correct
8 Correct 3 ms 35544 KB Output is correct
9 Correct 3 ms 35544 KB Output is correct
10 Correct 4 ms 35544 KB Output is correct
11 Correct 4 ms 35544 KB Output is correct
12 Correct 12 ms 35544 KB Output is correct
13 Correct 7 ms 35544 KB Output is correct
14 Correct 4 ms 35544 KB Output is correct
15 Correct 4 ms 35544 KB Output is correct
16 Correct 4 ms 35544 KB Output is correct
17 Correct 4 ms 35544 KB Output is correct
18 Correct 3 ms 35544 KB Output is correct
19 Correct 3 ms 35544 KB Output is correct
20 Correct 5 ms 35544 KB Output is correct
21 Correct 3 ms 35544 KB Output is correct
22 Correct 3 ms 35544 KB Output is correct
23 Correct 4 ms 35544 KB Output is correct
24 Correct 5 ms 35544 KB Output is correct
25 Correct 4 ms 35544 KB Output is correct
26 Correct 89 ms 35716 KB Output is correct
27 Correct 81 ms 35720 KB Output is correct
28 Correct 5 ms 35720 KB Output is correct
29 Correct 6 ms 35720 KB Output is correct
30 Correct 4 ms 35720 KB Output is correct
31 Correct 9 ms 35720 KB Output is correct
32 Correct 5 ms 35720 KB Output is correct
33 Correct 8 ms 35720 KB Output is correct
34 Correct 7 ms 35720 KB Output is correct
35 Correct 15 ms 35720 KB Output is correct
36 Correct 6 ms 35720 KB Output is correct
37 Correct 18 ms 35720 KB Output is correct
38 Correct 19 ms 35720 KB Output is correct
39 Correct 26 ms 35720 KB Output is correct
40 Correct 20 ms 35720 KB Output is correct
41 Correct 20 ms 35720 KB Output is correct
42 Runtime error 711 ms 263168 KB Execution killed with signal 9 (could be triggered by violating memory limits)
43 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Runtime error 3 ms 263168 KB Memory limit exceeded: We have a known bug that the memory usage is measured incorrectly (possibly because of Meltdown/Spectre patch), so your solution may be correct. Please submit again. Sorry for the inconvenience.
2 Halted 0 ms 0 KB -