Submission #667590

#	Time	Username	Problem	Language	Result	Execution time	Memory
667590		berr	Roads (CEOI20_roads)	C++17	0 / 100	1 ms	340 KiB

roads

#include <bits/stdc++.h>
using namespace std;
const int N=1e5+37;
//1.st subtask all are vertical

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

    int n; cin>>n;
    vector<array<int, 2>> node(2*n+1);

    vector<array<int, 3>> q;

    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];

        array<int, 2> a=node[i];
        array<int, 2>b=node[i+1];

        swap(a[0], a[1]);
        swap(b[0], b[1]);


        if(b<a)
        {
            q.push_back({node[i+1][0], node[i+1][1], i+1});
        }
        else
        {
            q.push_back({node[i][0], node[i][1], i});
        }

    }

    sort(q.begin(), q.end());

    for(int i=0; i<q.size()-1; i++)
    {
        int v=q[i][2];
        int u=q[i+1][2];
        cout<<node[v][0]<<" "<<node[v][1]<<" "<<node[u][0]<<" "<<node[u][1]<<"\n";
    }


}

Compilation message (stderr)

roads.cpp: In function 'int main()':
roads.cpp:41:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<int, 3> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |     for(int i=0; i<q.size()-1; i++)
      |                  ~^~~~~~~~~~~

• Subtask 1: 0 / 0
• Subtask 2: 0 / 15
• Subtask 3: 0 / 15
• Subtask 4: 0 / 15
• Subtask 5: 0 / 15
• Subtask 6: 0 / 40