Submission #1361915

#	Time	Username	Problem	Language	Result	Execution time	Memory
1361915		JelaByteEngineer	Love Polygon (BOI18_polygon)	C++20	0 / 100	154 ms	13752 KiB

polygon

#include <bits/stdc++.h>
#define ll long long
using namespace std;
vector <vector <int>> g;

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n; cin>>n;
    map <string, int> num;
    g.resize(n);
    int cnt=0;
    for (int i=0; i<n; i++)
    {
        string s1, s2; cin>>s1>>s2;
        if (num[s1]==0) num[s1]=cnt++;
        if (num[s2]==0) num[s2]=cnt++;
        g[num[s1]].push_back(num[s2]);
        g[num[s2]].push_back(num[s1]);
    }
    if (n%2!=0) cout<<-1<<endl;
    else
    {
        cout<<n/2<<endl;
    }
    return 0;
}

• Subtask 1: 0 / 21
• Subtask 2: 0 / 25
• Subtask 3: 0 / 29
• Subtask 4: 0 / 25