oj.uz

Submission #1040155

# Submission time Handle Problem Language Result Execution time Memory
1040155 2024-07-31T17:16:56 Z Marco_Escandon Event Hopping (BOI22_events) C++11
10 / 100
 1500 ms 43448 KB 
#include<bits/stdc++.h>
using namespace std;
typedef int ll;
#define x first
#define y second
#pragma optimize("O3")
vector<vector<ll>> G( 5005);
vector<ll> v[5005];
vector<pair<ll,ll>> input;
void cmc(ll n,ll ini)
{
    v[ini].assign(n+1,1e9);
    queue<ll> q;
    q.push(ini);
    v[ini][ini]=0;
    map<ll,ll> mapa;
    while(!q.empty())
    {
        ll a=q.front();q.pop();
        for(auto i:G[a])
        {
            if(v[ini][i]==1e9)
            {
                v[ini][i]=v[ini][a]+1;
                if(mapa[input[i].y]==0)
                {
                    q.push(i);
                    mapa[input[i].y]=1;
                }
            }
        }
    }
}
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    ll n,q;
    cin>>n>>q;
    input.push_back({0,0});
    vector<pair<ll,ll>> cad;
    for(int i=1; i<=n; i++)
    {
        ll a,b;
        cin>>a>>b;
        input.push_back({a,b});
        cad.push_back({a,i});
        cad.push_back({b,i});
    }
    sort(cad.begin(),cad.end());
    set<ll> s;
    for(int i=0; i<cad.size(); i++)
    {
        vector<ll> temp,temp2;
        ll a=i;
        while(i<cad.size()&&cad[a].x==cad[i].x){
            temp.push_back(cad[i].y);
            i++;
        }
        i--;
        for(auto j:temp)
        {
            if(s.find(j)!=s.end())
                temp2.push_back(j);
            else s.insert(j);
        }
        for(auto j:temp2) for(auto k:s) G[j].push_back(k);
        for(auto j:temp2) if(s.find(j)!=s.end()) s.erase(j);
    }
    for(int i=1; i<=n; i++)
        cmc(n,i);
    for(int i=0; i<q; i++)
    {
        ll a,b;
        cin>>a>>b;
        a=v[a][b];
        if(a==1e9) cout<<"impossible"<<"\n";
        else cout<<a<<"\n";
    }
    return 0;
}

Compilation message

events.cpp:6: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
    6 | #pragma optimize("O3")
      | 
events.cpp: In function 'int main()':
events.cpp:52:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |     for(int i=0; i<cad.size(); i++)
      |                  ~^~~~~~~~~~~
events.cpp:56:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |         while(i<cad.size()&&cad[a].x==cad[i].x){
      |               ~^~~~~~~~~~~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 604 KB Output is correct
2 Runtime error 27 ms 6088 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 0 ms 600 KB Output is correct
3 Correct 42 ms 4600 KB Output is correct
4 Correct 22 ms 4700 KB Output is correct
5 Correct 45 ms 4688 KB Output is correct
6 Correct 33 ms 5468 KB Output is correct
7 Correct 166 ms 6044 KB Output is correct
8 Correct 190 ms 7304 KB Output is correct
9 Correct 15 ms 8536 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 0 ms 600 KB Output is correct
3 Correct 42 ms 4600 KB Output is correct
4 Correct 22 ms 4700 KB Output is correct
5 Correct 45 ms 4688 KB Output is correct
6 Correct 33 ms 5468 KB Output is correct
7 Correct 166 ms 6044 KB Output is correct
8 Correct 190 ms 7304 KB Output is correct
9 Correct 15 ms 8536 KB Output is correct
10 Correct 0 ms 604 KB Output is correct
11 Correct 0 ms 600 KB Output is correct
12 Correct 44 ms 4692 KB Output is correct
13 Correct 22 ms 4696 KB Output is correct
14 Correct 45 ms 4484 KB Output is correct
15 Correct 32 ms 5204 KB Output is correct
16 Correct 160 ms 6224 KB Output is correct
17 Correct 176 ms 7252 KB Output is correct
18 Correct 12 ms 8536 KB Output is correct
19 Execution timed out 1602 ms 43448 KB Time limit exceeded
20 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 0 ms 600 KB Output is correct
3 Correct 42 ms 4600 KB Output is correct
4 Correct 22 ms 4700 KB Output is correct
5 Correct 45 ms 4688 KB Output is correct
6 Correct 33 ms 5468 KB Output is correct
7 Correct 166 ms 6044 KB Output is correct
8 Correct 190 ms 7304 KB Output is correct
9 Correct 15 ms 8536 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 1 ms 600 KB Output is correct
12 Correct 46 ms 4560 KB Output is correct
13 Correct 22 ms 4696 KB Output is correct
14 Correct 45 ms 4688 KB Output is correct
15 Correct 33 ms 5468 KB Output is correct
16 Correct 159 ms 6200 KB Output is correct
17 Correct 171 ms 7104 KB Output is correct
18 Correct 16 ms 8540 KB Output is correct
19 Runtime error 26 ms 6084 KB Execution killed with signal 11
20 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Runtime error 27 ms 6084 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 604 KB Output is correct
2 Runtime error 27 ms 6088 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -