Submission #953145

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
953145	2024-03-25T14:42:40 Z	PM1	File Paths (BOI15_fil)	C++17	33 / 100	29 ms	3160 KB

fil

#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];
bitset<mxs>b[mxn*2];
vector<int>all,v[mxn];
bool 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 dfs(int z){
	int y=par[z];
	
	for(auto i:v[z]){
		dfs(i);
	}
}
int main(){
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	cin>>n>>m>>k>>s;
	s++;
	for(int i=1;i<=n+m;i++){
		int x,y;
		cin>>x>>y;
		par[i]=x;
		dis[i]=dis[x]+y+1;
		if(i<=n){
			all.push_back(dis[i]);
			v[x].push_back(i);
		}
	}
	all.push_back(0);
	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;
}

Compilation message

fil.cpp: In function 'void dfs(int)':
fil.cpp:17:6: warning: unused variable 'y' [-Wunused-variable]
   17 |  int y=par[z];
      |      ^

Subtask #1

0 / 33.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	1 ms	2392 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #2

33.0 / 33.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	14 ms	2652 KB	Output is correct
2	Correct	12 ms	2652 KB	Output is correct
3	Correct	12 ms	2652 KB	Output is correct
4	Correct	13 ms	2652 KB	Output is correct
5	Correct	29 ms	2892 KB	Output is correct
6	Correct	29 ms	2892 KB	Output is correct
7	Correct	22 ms	3160 KB	Output is correct
8	Correct	21 ms	2844 KB	Output is correct
9	Correct	13 ms	2648 KB	Output is correct
10	Correct	11 ms	2652 KB	Output is correct
11	Correct	10 ms	2652 KB	Output is correct
12	Correct	27 ms	2716 KB	Output is correct

Subtask #3

0 / 34.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	1 ms	2392 KB	Output isn't correct
2	Halted	0 ms	0 KB	-