Submission #863334

#	Time	Username	Problem	Language	Result	Execution time	Memory
863334		maks007	Paths (BOI18_paths)	C++14	23 / 100	3100 ms	7772 KiB

paths

// Bismi Allah
#include "bits/stdc++.h"

using namespace std;

#define int long long

signed main () {
	ios::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	int n, m, k, ans = 0;
	cin >> n >> m >> k;
	vector <int> color(n), g[n], used(n);
	set <int> colorUsed;
	function <void(int)> dfs=[&](int v) {
		ans ++;
		used[v] = 1;
		colorUsed.insert(color[v]);
		for(auto u : g[v] ) {
			if(!used[u] && colorUsed.count(color[u]) == 0) dfs(u);
		}
		used[v]=0;
		colorUsed.erase(color[v]);
	};
	
	for(int i = 0; i < n; i ++) cin >> color[i];
	for(int i = 0; i < m; i ++) {
		int u, v;
		cin >> u >> v;
		u --, v --;
		g[u].push_back(v);
		g[v].push_back(u);
	}
	for(int firstColor = 1; firstColor <= k; firstColor ++) {
		for(int i = 0; i < n; i ++) {
			if(color[i] == firstColor) {
				dfs(i);
			}
		}
	}
	cout << ans-n;
	return 0;
}

• Subtask 1: 23 / 23
• Subtask 2: 0 / 20
• Subtask 3: 0 / 27
• Subtask 4: 0 / 30