oj.uz

Submission #841810

# Submission time Handle Problem Language Result Execution time Memory
841810 2023-09-02T06:49:02 Z vjudge1 Roadside Advertisements (NOI17_roadsideadverts) C++17
7 / 100
 43 ms 17496 KB 
#include <bits/stdc++.h>
#define ll long long
#define int ll
#define pii pair<int, int>
#define ff first
#define ss second
#define pb push_back
#define in insert
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)x.size()
#define deb(x) cout << #x << " = " << x << '\n';
#define file(x) freopen(x".in", "r", stdin), freopen(x".out", "w", stdout)
using namespace std;

// const int dx[] = {0, 1, 0, -1};
// const int dy[] = {1, 0, -1, 0};

const int inf = 1e9;
const ll INF = 1e18;
const int mod = 1e9 + 7;
const int N = 1e5 + 5;

int n, q, tin[N], tout[N], timer, up[N][21], pref[N], ans, a[21];
vector <pii> g[N];

void dfs(int v, int p) {
	tin[v] = ++timer;
	up[v][0] = p;
	for(int i = 1; i <= 20; i++) {
		up[v][i] = up[up[v][i - 1]][i - 1];
	}
	for(auto to:g[v]) {
		if(to.ff == p) continue;
		pref[to.ff] = pref[v] + to.ss;
		dfs(to.ff, v);
	}
	tout[v] = timer;
}

bool notanc(int v) {
	int cnt = 0;
	for(int i = 1; i <= 5; i++) {
		cnt += (tin[v] <= tin[a[i]] && tout[a[i]] <= tout[v]);
	}
	return cnt == 1;
}

void solve() {
	cin >> n;
	for(int i = 1; i <= n - 1; i++) {
		int u, v, w;
		cin >> u >> v >> w;
		g[u].pb({v, w});
		g[v].pb({u, w});
	}
	dfs(1, 1);
	cin >> q;
	while(q--) {
		for(int i = 1; i <= 5; i++) {
			cin >> a[i];
		}
		ans = 0;
		for(int i = 1; i <= 5; i++) {
			int v = a[i];
			for(int j = 20; j >= 0; j--) {
				if(notanc(up[v][j])) v = up[v][j];
			}
			ans += pref[a[i]] - pref[up[v][0]];
		}
		cout << ans << '\n';
	}
}

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

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4696 KB Output is correct

Subtask #2
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 43 ms 17496 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Incorrect 21 ms 16216 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4696 KB Output is correct
2 Incorrect 43 ms 17496 KB Output isn't correct
3 Halted 0 ms 0 KB -