Submission #546897

# Submission time Handle Problem Language Result Execution time Memory
546897 2022-04-08T19:50:09 Z OttoTheDino File Paths (BOI15_fil) C++17
0 / 100
10 ms 1108 KB
#include <bits/stdc++.h>
using namespace std;

#define rep(i,s,e)                  for (ll i = s; i <= e; ++i)
#define rrep(i,s,e)                 for (ll i = s; i >= e; --i)
#define pb                          push_back
#define pf                          push_front
#define fi                          first
#define se                          second
#define all(a)                      a.begin(), a.end()
#define SZ(a)                       (ll)a.size()
typedef long long ll;
typedef pair<ll, ll> ii;
typedef vector<ii> vii;
typedef vector<ll> vi;
typedef vector<double> vd;
typedef vector<string> vs;
typedef vector<ll> vll;

const ll mx = 3e3, mx2 = 1e7;
vi adj[mx+1], files[mx+1];
ll cost[mx+1], costf[mx+1], ans[mx+1], s, k;
map<ll,ll> cnt;

void dfs2 (ll u, ll cur, ll d) {
    cnt[cur] += d;
    for (ll v : adj[u]) dfs2 (v, cur+cost[v], d);
}

void dfs (ll u, ll cur) {
    dfs2 (u, 0, 1);
    for (ll v : adj[u]) dfs (v, cur + cost[v]);
    for (ll v : files[u]) {
        ll x = k - cur - costf[v];
        if (x==0) ans[v] = 1;
        for (ll i = 1; i*i <= x; ++i) {
            if (x%i==0) {
                if (i-s>=0 && cnt[i-s]) ans[v] = 1;
                if (x/i-s>=0 && cnt[x/i-s]) ans[v] = 1;
            }
        }
    }
    dfs2 (u, 0, -1);
}

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);

    ll n, m; cin >> n >> m >> k >> s;
    ++s;
    rep (i,1,n) {
        ll p; cin >> p >> cost[i];
        ++cost[i];
        adj[p].pb(i);
    }
    rep (i,1,m) {
        ll p; cin >> p >> costf[i];
        ++costf[i];
        files[p].pb(i);
    }
    dfs (0,0);
    rep (i,1,m) cout << (ans[i]?"YES":"NO") << "\n";

    return 0;
}

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 468 KB Output isn't correct
2 Halted 0 ms 0 KB -
# Verdict Execution time Memory Grader output
1 Incorrect 10 ms 1108 KB Output isn't correct
2 Halted 0 ms 0 KB -
# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 468 KB Output isn't correct
2 Halted 0 ms 0 KB -