Submission #1129486

#	Time	Username	Problem	Language	Result	Execution time	Memory
1129486		stdfloat	Love Polygon (BOI18_polygon)	C++20	0 / 100	1 ms	836 KiB

polygon

#include <bits/stdc++.h>
using namespace std;

using ll = long long;

int main() {
	ios::sync_with_stdio(false); cin.tie(nullptr);

	int n;
	cin >> n;

	if (n & 1) return cout << -1, 0;

	vector<int> pr(n);
	map<string, int> m;
	for (int i = 0; i < n; i++) {
		string s, t;
		cin >> s >> t;

		if (m.find(s) == m.end()) m[s] = (int)m.size();
		if (m.find(t) == m.end()) m[t] = (int)m.size();
	
		assert(s == t);

		pr[m[s]] = m[t];
	}

	cout << n;
}

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