제출 #1171344

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1171344		belgianbot	File Paths (BOI15_fil)	C++20	33 / 100	1092 ms	1320 KiB

fil

/*
    AUTHOR : BELGIANBOT
*/

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;

template<typename T> void read(T& x) { cin >> x;}
template<typename T1, typename T2> void read(pair<T1, T2>& p) { read(p.first), read(p.second);}
template<typename T> void read(vector<T>& v) { for (auto& x : v) read(x); }
template<typename T1, typename T2> void read(T1& x, T2& y) { read(x), read(y); }
template<typename T1, typename T2, typename T3> void read(T1& x, T2& y, T3& z) { read(x), read(y), read(z); }
template<typename T1, typename T2, typename T3, typename T4> void read(T1& x, T2& y, T3& z, T4& zz) { read(x), read(y), read(z), read(zz); }
template<typename T> void print(vector<T>& v) { for (auto& x : v) cout << x << ' '; cout << endl; }

#define quit(x) return (void)(cout << x << endl)
#define pb push_back
#define fi first
#define se second
#define ordered_set tree<pair<int,int>, null_type, less<pair<int,int>>, rb_tree_tag, tree_order_statistics_node_update>
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define mp make_pair
#define sz(x) (int)(x.size())
#define YES cout<<"YES\n"
#define NO cout<<"NO\n"
#define QYES quit("YES")
#define QNO quit("NO")
#define cmin(a, b) a = min(a, b)
#define cmax(a, b) a = max(a, b)
#define int long long
#define double long double


const int inf = numeric_limits<int>::max() / 4;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int MOD = 1e9+7, LOG=20;

void solve();

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

int k, n, m, p, q, s;
vector<vector<pair<int,int>>> adj, file;
vector<bool> ok;
vector<int> path, nodePath;

bool find(int x, int sum, int w, int in) {
    auto it = find(all(path), sum + s + w - k);
    if (it != path.end()) return true;

    if (n <= 500 && m <= 500) {
        int index = find(all(nodePath), in) - nodePath.begin();
        for (int i = 1; i <= sqrt(k-w); i++) {
            if ((k-w)%i) continue;
            auto it2 = find(path.begin(), path.begin()+index+1, sum + s - i);
            if (it2 != path.begin()+index+1) return true;
            it2 = find(path.begin(), path.begin()+index+1, sum + s - ((k-w)/i));
            if (it2 != path.begin()+index+1) return true;
        }
    }
    bool win = false;
    for (auto [y, weight] : adj[x]) {
        if (find(all(nodePath), y) != nodePath.end())  {
            win = find(y, sum + weight, w, y);
        }
        else win = find(y, sum + weight, w, in);
        if (win) return true;
    }
    return false;
}
void dfs(int x, int sum) {
    nodePath.push_back(x);
    path.push_back(sum);
    for (auto [f, w] : file[x]) {
        ok[f] = (find(0, 0, sum + w, 0) || sum + w == k);
    }
    for (auto [y, weight] : adj[x]) dfs(y, sum + weight);
    nodePath.pop_back();
    path.pop_back();
}
void solve() {
    cin >> n >> m >> k >> s;
    s++;

    adj.resize(n+1); ok.resize(m, false); file.resize(n+1);
    for (int i = 1; i <= n; i++) {
        int a, b; cin >> a >> b;
        adj[a].push_back({i,b+1});
    }
    for (int i = 0; i < m; i++) {
        int a, b; cin >> a >> b;
        file[a].push_back({i, b+1});
    }
    dfs(0, 0);

    for (auto x : ok) {
        if (x) cout << "YES\n";
        else cout <<"NO\n";
    }

}

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