Submission #1171817

#TimeUsernameProblemLanguageResultExecution timeMemory
1171817NonozeFile Paths (BOI15_fil)C++20
33 / 100
1047 ms156732 KiB
/* * Author: Nonoze * Created: Monday 10/03/2025 */ #include <bits/stdc++.h> using namespace std; #ifndef DEBUG #define dbg(...) #endif // #define cout cerr << "OUT: " #define endl '\n' #define endlfl '\n' << flush #define quit(x) return (void)(cout << x << endl) 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 sz(x) (int)(x.size()) #define all(x) (x).begin(), (x).end() #define rall(x) (x).rbegin(), (x).rend() #define make_unique(v) sort(all(v)), v.erase(unique(all(v)), (v).end()) #define pb push_back #define mp(a, b) make_pair(a, b) #define fi first #define se second #define cmin(a, b) a = min(a, b) #define cmax(a, b) a = max(a, b) #define YES cout << "YES" << endl #define NO cout << "NO" << endl #define QYES quit("YES") #define QNO quit("NO") // #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(0); cin.tie(0); int tt=1; // cin >> tt; while(tt--) solve(); return 0; } int n, k, m, q; vector<int> a, par, w; vector<unordered_set<int>> vec; void solve() { read(n, m, k); int s; read(s); s++; a.clear(), a.resize(n+1); a[0]=1; par.clear(), par.resize(n+1); par[0]=-1; w.clear(), w.resize(n+1); for (int i=0; i<n; i++) { int p, l; read(p, l); a[i+1]=a[p]+l+1; par[i+1]=p, w[i+1]=l+1; } n++; vec.clear(), vec.resize(n); for (int i=0; i<n; i++) { int j=i; while (j!=-1) { vec[j].insert(a[i]-a[j]); j=par[j]; } } for (int T=0; T<m; T++) { int p, l; read(p, l); if (a[p]+l==k) { YES; continue; } unordered_set<int> st; int val=a[p]+l; int act=p; while (act!=-1) st.insert(val-a[act]), act=par[act]; bool ok=0; for (int i=0; i<n; i++) if (st.count(k-a[i]-s)) ok=1; if (ok) { YES; continue; } else if (val>=k) { NO; continue; } val=k-val; unordered_set<int> vals; for (int i=1; i*i<=val; i++) { if (val%i==0) { if (i-s>=0) vals.insert(i-s); if (i*i!=val && val/i-s>=0) vals.insert(val/i-s); } } act=p; while (act!=-1) { if (sz(vals)<sz(vec[act])) { for (auto x: vals) { if (vec[act].count(x)) { ok=1; break; } } } else { for (auto x: vec[act]) { if (vals.count(x)) { ok=1; break; } } } if (ok) break; act=par[act]; } if (ok) YES; else NO; } }
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