#include<bits/stdc++.h>
#define ll long long
#define F first
#define S second
using namespace std;
int n,m,s,k,f[3010],l[3010],dep[3010];
set<int> sub[3010],ring[3010],path[3010];
int main(){
ios::sync_with_stdio(0);
cin.tie(0);
cin>>n>>m>>k>>s;
s++;
for(int i=1;i<=n;i++){
cin>>f[i]>>l[i];
l[i]++;
}
for(int i=1;i<=n;i++){
dep[i]=dep[f[i]]+l[i];
}
for(int i=n;i>=0;i--){
sub[i].insert(dep[i]);
if(i!=0){
for(auto x:sub[i]){
sub[f[i]].insert(x);
}
}
}
for(int i=0;i<=n;i++){
for(auto x:sub[i]){
ring[i].insert(x-dep[i]);
}
if(i!=0){
for(auto x:ring[f[i]]){
ring[i].insert(x);
}
}
}
for(int i=0;i<=n;i++)sub[i].clear();
for(int i=0;i<=n;i++){
sub[i].insert(dep[i]);
if(i!=0){
for(auto x:sub[f[i]]){
sub[i].insert(x);
}
}
}
for(int i=0;i<=n;i++){
for(auto x:sub[i]){
path[i].insert(dep[i]-x);
}
if(i!=0){
for(auto x:path[f[i]]){
path[i].insert(x);
}
}
}
for(int i=0;i<m;i++){
int a,b,tar=k,ok=0;
cin>>a>>b;
tar-=dep[a];
tar-=b+1;
if(tar==0){
ok=1;
}
if(path[a].find(-tar+s)!=path[a].end())ok=1;
if(ring[a].find(tar-s)!=ring[a].end())ok=1;
if(ok){
cout<<"YES\n";
}else{
cout<<"NO\n";
}
}
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
2 ms |
1368 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
511 ms |
262144 KB |
Execution killed with signal 9 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
2 ms |
1368 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |