#include <bits/stdc++.h>
using namespace std;
#define dbgv(v) cout<<#v<<" = "; f(i,0,v.size()) cout<<v[i]<<" "; cout<<endl
#define dbga(a,x,y) cout<<#a<<" = "; f(i,x,y) cout<<a[i]<<" "; cout<<endl
#define erorp(x) cout<<#x<<"={"<<(x.F)<<" , "<<x.S<<"}"<<endl
#define eror(x) cout<<#x<<'='<<(x)<<endl
#define f_(i,a,b) for(int i=a;i>=b;i--)
#define f(i,a,b) for(int i=a;i<b;i++)
#define nb(x) __builtin_popcount(x)
#define all(v) v.begin(),v.end()
#define bit(n,k) (((n)>>(k))&1)
#define Add(x,y) x=(x+y)%mod
#define maxm(a,b) a=max(a,b)
#define minm(a,b) a=min(a,b)
#define lst(x) x[x.size()-1]
#define sz(x) int(x.size())
#define mp make_pair
#define ll long long
#define pb push_back
#define S second
#define F first
#define int ll
const int N=3333,maxs=1e6+99;
int n,m,k,s,a[N],b[N],h[N],ans[N],par[N],cnt[maxs];
vector<int> vec,g[N],Q[N];
void dfs(int u){
vec.pb(h[u]);
for(int v=u;;v=par[v]){
cnt[h[u]-h[par[v]]+s]++;
if(v==0) break;
}
for(auto x : Q[u]){
int val=k-b[x]-h[u];
//cout<<x<<" -> "<<val<<" "<<k<<" "<<b[x]<<" "<<h[u]<<endl;
if(val<0) continue ;
if(val==0){
ans[x]=1;
continue ;
}
for(int j=1;j*j<=val;j++){
if(val%j==0 && cnt[j]){
// ans[x]=1;
}
if(val%j==0 && cnt[val/j]){
// ans[x]=1;
}
}
}
for(auto v : g[u]){
if(v==par[v]) continue ;
h[v]+=h[u];
dfs(v);
}
for(int v=u;;v=par[v]){
cnt[h[u]-h[par[v]]+s]--;
if(v==0) break;
}
}
main(){
ios::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);
cin>>n>>m>>k>>s;
s++;
f(i,1,n+1){
cin>>par[i]>>h[i];
g[par[i]].pb(i);
h[i]++;
}
f(i,1,m+1){
int p;
cin>>a[i]>>b[i];
b[i]++;
Q[a[i]].pb(i);
}
dfs(0);
sort(all(vec));
f(i,1,m+1){
int u=a[i],p=vec.size()-1;
for(;;u=par[u]){
int val=k-b[i]-(h[a[i]]-h[u])-s;
//cout<<k<<" "<<b[i]<<" "<<h[a[i]]-h[par[u]]<<" : "<<val<<endl;
while(p>0 && vec[p]>val){
p--;
}
if(vec[p]==val){
ans[i]=1;
}
if(u==0) break;
}
}
f(i,1,m+1){
if(ans[i]) cout<<"YES\n";
else cout<<"NO\n";
}
}
Compilation message
fil.cpp:63:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
63 | main(){
| ^~~~
fil.cpp: In function 'int main()':
fil.cpp:73:7: warning: unused variable 'p' [-Wunused-variable]
73 | int p;
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
460 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
3 ms |
1612 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
460 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
