Submission #1103001

#	Time	Username	Problem	Language	Result	Execution time	Memory
1103001		THXuan	Drivers (BOI24_drivers)	C++14	100 / 100	128 ms	25164 KiB

Main

#include <iostream>
#include <vector>
#include <algorithm>
#include <queue>
#include <set>
#include <map>
#define INF 1e9
using namespace std;
typedef long long ll;

ll link[200005];
ll sz[200005];

ll find(int x) {
	while (x != link[x]) x = link[x];
	return x;
}

void unite(int a, int b) {
	a = find(a);
	b = find(b);
	if (a != b) {
		if (sz[a] < sz[b]) swap(a, b);
		sz[a] += sz[b];
		link[b] = a;
	}
}

void solve()
{
	int n, m, u; cin >> n >> m >> u;
	for (int i = 1; i <= n; i++) {
		link[i] = i; sz[i] = 1;
	}
	vector<pair<ll, pair<int, int>>>edges(m);
	vector<pair<pair<ll, int>, pair<int, int>>>q(u);
	vector<string>ans(u);
	for (int i = 0; i < m; i++) {
		cin >> edges[i].second.first >> edges[i].second.second >> edges[i].first;
	}
	for (int i = 0; i < u; i++) {
		cin >> q[i].second.first >> q[i].second.second >> q[i].first.first; q[i].first.second = i;
	}
	sort(edges.begin(), edges.end());
	sort(q.begin(), q.end());
	int j = 0;
	for (int i = 0; i < u; i++) {
		while (j < m && edges[j].first <= q[i].first.first) {
			unite(edges[j].second.first, edges[j].second.second);
			++j;
		}
		if (find(q[i].second.first) == find(q[i].second.second)) {
			ans[q[i].first.second] = "TAIP";
		}
		else ans[q[i].first.second] = "NE";
	}
	for (int i = 0; i < u; i++) {
		cout << ans[i] << "\n";
	}
}

int main()
{
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	int t = 1;// cin>>t;
	while (t--) solve();
	return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 11 / 11
• Subtask 3: 11 / 11
• Subtask 4: 23 / 23
• Subtask 5: 45 / 45