#include <bits/stdc++.h>
using namespace std;
const int mxn=3e3+5,mxs=1e6+5;
int n,m,s,k,par[mxn*2],dis[mxn*2];
vector<int>all,v[mxn*2];
int mark[mxs],ans[mxn*2];
void make(int x,bool y){
int z=x;
while(x!=0){
x=par[x];
int d=dis[z]-dis[x];
if(d<=k)mark[d]=y;
}
}
void dfs1(int z,int g,int x){
if(z>n)
return ;
x+=dis[z]-dis[par[z]];
if(x<mxs)
mark[x]+=g;
for(auto i:v[z])
dfs1(i,g,x);
}
void dfs(int z){
if(z>n){
int x=k-dis[z];
for(int i=1;i*i<=x;i++){
if(x%i==0 &&(mark[i] || mark[x/i]))ans[z]=1;
}
}
dfs1(z,1,s);
for(auto i:v[z])
dfs(i);
dfs1(z,-1,s);
}
int main(){
ios::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
cin>>n>>m>>k>>s;
s++;
dis[0]=1;
par[0]=mxn*2-1;
for(int i=1;i<=n+m;i++){
int x,y;
cin>>x>>y;
par[i]=x;
dis[i]=dis[x]+y;
v[x].push_back(i);
if(i<=n){
dis[i]++;
all.push_back(dis[i]);
}
}
all.push_back(1);
for(int i=n+1;i<=n+m;i++){
make(i,1);
if(dis[i]==k)ans[i]=1;
for(auto j:all){
int res=k-j-s;
if(res>=0 && mark[res])ans[i]=1;
}
make(i,0);
}
dfs(0);
for(int i=n+1;i<=n+m;i++){
if(ans[i])
cout<<"YES"<<'\n';
else
cout<<"NO"<<'\n';
}
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
1 ms |
604 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
26 ms |
4540 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
1 ms |
604 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
