Submission #668756

#	Time	Username	Problem	Language	Result	Execution time	Memory
668756		Kahou	File Paths (BOI15_fil)	C++14	0 / 100	9 ms	8304 KiB

fil

#include<bits/stdc++.h>
using namespace std;
#define F first
#define S second
#define endl '\n'
#define mk make_pair
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
 
const int N = 6050, M = 1e6 + 50;
int n, m, h[N], k, s, p[N];
vector<int> adj[N];
bool out[N];
int cnt[M];
vector<int> vc[N];
vector<int> vt[N];
 
void dfs(int u) {
        for (int x:vt[u]) {
                cnt[x]++;
        }
        if (u > n) {
                cerr << "OK " << u << endl;
                int T = k-h[u];
                cerr << T << endl;
                for (int d = 1; d*d <= T; d++) {
                        if (T%d == 0) {
                                cout << d << ' ' <<  cnt[d] << endl;
                                cout << T/d << ' ' << cnt[T/d] << endl;
                                out[u] = out[u] || (cnt[d] > 0);
                                out[u] = out[u] || (cnt[T/d] > 0);
                        }
                }
        }
        for (int v:adj[u]) {
                dfs(v);
        }
        for (int x:vt[u]) {
                cnt[x]--;
        }
}

void solve() {
        cin >> n >> m >> k;
        cin >> s;

        s++;
        vc[0].push_back(0);
        p[0] = -1;
 
        for (int u = 1; u <= n+m; u++) {
                int l;
                cin >> p[u] >> l;
                adj[p[u]].push_back(u);

                l++;
                h[u] = h[p[u]]+l;
                vc[u] = vc[p[u]];
                if (u <= n) vc[u].push_back(h[u]);
        }
 
        for (int u = 0; u <= n; u++) {
                int v = u;
                while (v >= 0) {
                        vt[v].push_back(h[u]-h[v]+s);
                        v = p[v];
                }
        }
 
        dfs(0);
        sort(h, h+n+1);
        for (int u = n+1; u <= n+m; u++) {
                out[u] = out[u] || (h[u] == k);
                for (int x:vc[u]) {
                        int v = lower_bound(h, h+n+1, k-s-(h[u]-x))-h;
                        out[u] = out[u] || (h[v] + s + h[u]-x == k);
                }
                cout << (out[u]?"YES":"NO") << endl;
        }
}
int main() {
        ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
        solve();
        return 0;
}

• Subtask 1: 0 / 33
• Subtask 2: 0 / 33
• Subtask 3: 0 / 34