oj.uz

Submission #667570

# Submission time Handle Problem Language Result Execution time Memory
667570 2022-12-01T17:52:39 Z berr Roads (CEOI20_roads) C++17
0 / 100
 2 ms 2644 KB 
#include <bits/stdc++.h>
using namespace std;
const int N=1e5+37;
// subtask all are vertical
vector<array<int, 2>> a[N];

signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    int n; cin>>n;
    vector<array<int, 2>> node(2*n+1);
    vector<int> x, y;
    map<int, int> cx, cy;
    for(int i=1; i<=n*2; i+=2)
    {
        cin>>node[i][0]>>node[i][1];
        cin>>node[i+1][0]>>node[i+1][1];

        x.push_back(node[i][0]);
        x.push_back(node[i+1][0]);
        y.push_back(node[i][1]);
        y.push_back(node[i+1][1]);
    }

    sort(x.begin(), x.end());
    sort(y.begin(), y.end());


    int cnt=1;

    for(auto i: x)
    {
        if(!cx.count(i)) cx[i]=cnt, cnt++;
    }

    cnt=1;

    for(auto i: y)
    {
        if(!cy.count(i)) cy[i]=cnt, cnt++;
    }


    for(int i=1; i<=2*n; i++)
    {
        a[cy[node[i][1]]].push_back({cx[node[i][0]], i});
    }


    for(int i=0; i<N; i++)
    {
        if(a[i].size())
        {
            sort(a[i].begin(), a[i].end());
        }
    }

    vector<array<int, 4>> ans;
    for(int i=1; i<N; i++)
    {
        if(a[i].size()){
        for(int l=1; l<a[i].size()-1; l+=2)
        {
            int v=a[i][l][1];
            int u=a[i][l+1][1];

            ans.push_back({node[v][0], node[v][1], node[u][0], node[u][1]});
        }
        if(!a[i+1].size()) break;


        int v=a[i][0][1];
        int u=a[i+1][0][1];
            ans.push_back({node[v][0], node[v][1], node[u][0], node[u][1]});

    }
    }


    for(auto i: ans) cout<<i[0]<<" "<<i[1]<<" "<<i[2]<<" "<<i[3]<<"\n";

}

Compilation message

roads.cpp: In function 'int main()':
roads.cpp:64:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<int, 2> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |         for(int l=1; l<a[i].size()-1; l+=2)
      |                      ~^~~~~~~~~~~~~~

Subtask #1
0 / 0.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 2644 KB Expected EOF
2 Halted 0 ms 0 KB -

Subtask #2
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2644 KB Expected EOF
2 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2644 KB Expected EOF
2 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2644 KB Expected EOF
2 Halted 0 ms 0 KB -

Subtask #5
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 2644 KB Expected EOF
2 Halted 0 ms 0 KB -

Subtask #6
0 / 40.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 2644 KB Expected EOF
2 Halted 0 ms 0 KB -