oj.uz

Submission #1055862

# Submission time Handle Problem Language Result Execution time Memory
1055862 2024-08-13T06:07:31 Z d(#11110) Summer Driving (CCO24_day1problem3) C++17
9 / 25
 6000 ms 1048576 KB 
#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include "debug.h"
#else
#define debug(...)
#endif
using pii=array<int,2>;
using tii=array<int,3>;
const int N=300005;
int n,r,a,b,dep[N],p[N],q[N],L[N],pA[N],subA[N];
vector<int> dp[N];
vector<int> dp2[N];
map<int,int> dp3[N],dp4[N];
vector<int> g[N],c[N],dA[N];
void dfs0(int u){
	L[dep[u]]=u;
	if(dep[u]>=a){
		pA[u]=L[dep[u]-a];
		subA[u]=L[dep[u]-a+1];
		dA[pA[u]].push_back(u);
	}
	int idx=0;
	for(int v: g[u]) if(p[u]!=v){
		dep[v]=dep[u]+1;
		p[v]=u;
		q[v]=++idx;
		c[u].push_back(v);
		dfs0(v);
	}
}
int dfs1(int u,int d);
int dfs2(int u,int d);
int Get(int u,int k){
	int &ret=dp[u][k];
	if(ret) return ret;
	for(int i=0;i<(int)dA[u].size();i++){
		int v=dA[u][i];
		if(q[subA[v]]==k) continue;
		if(dp2[u][i]){
			ret=max(ret,dp2[u][i]);
			continue;
		}
		int val=dfs1(v,b),w=v,d=0,e=0;
		while(d<b){
			e=q[w];
			w=p[w];
			d++;
			val=min(val,Get(w,e));
			if(d<b) for(int i=0;i<(int)c[w].size();i++) if(i+1!=e) val=min(val,dfs1(c[w][i],b-d-1));
		}
		dp2[u][i]=val;
		ret=max(ret,val);
	}
	if(!ret){
		ret=u;
		for(int i=0;i<(int)c[u].size();i++) if(i+1!=k) ret=min(ret,dfs2(c[u][i],b-1));
	}
	debug(u,k,ret);
	return ret;
}
int dfs1(int u,int d){
	int &ret=dp3[u][d];
	if(ret) return ret;
	ret=Get(u,0);
	if(d>=1) for(int v: c[u]) ret=min(ret,dfs1(v,d-1));
	debug(u,d,0,ret);
	return ret;
}
int dfs2(int u,int d){
	int &ret=dp4[u][d];
	if(ret) return ret;
	ret=u;
	if(d>=1) for(int v: c[u]) ret=min(ret,dfs2(v,d-1));
	debug(u,d,1,ret);
	return ret;
}
int main(){
	ios::sync_with_stdio(false); cin.tie(0);
	cin>>n>>r>>a>>b;
	if(a<=b){
		cout<<"1\n";
		return 0;
	}
	for(int u,v,i=1;i<n;i++){
		cin>>u>>v;
		g[u].push_back(v);
		g[v].push_back(u);
	}
	dfs0(r);
	for(int i=1;i<=n;i++){
		dp[i].resize(c[i].size()+1);
		dp2[i].resize(dA[i].size());
	}
	cout<<Get(r,0);
	return 0;
}

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 63832 KB Output is correct
2 Correct 20 ms 63832 KB Output is correct
3 Correct 21 ms 63836 KB Output is correct
4 Correct 21 ms 63836 KB Output is correct
5 Correct 20 ms 63656 KB Output is correct

Subtask #2
0.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 951 ms 284372 KB Output is correct
2 Correct 321 ms 176460 KB Output is correct
3 Runtime error 1993 ms 1048576 KB Execution killed with signal 9
4 Halted 0 ms 0 KB -

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 63828 KB Output is correct
2 Correct 24 ms 63972 KB Output is correct
3 Correct 23 ms 63740 KB Output is correct
4 Correct 24 ms 63972 KB Output is correct
5 Correct 26 ms 63832 KB Output is correct
6 Correct 23 ms 63960 KB Output is correct
7 Correct 27 ms 64004 KB Output is correct
8 Correct 23 ms 63836 KB Output is correct
9 Correct 23 ms 63836 KB Output is correct
10 Correct 23 ms 64004 KB Output is correct
11 Correct 23 ms 64092 KB Output is correct
12 Correct 23 ms 63836 KB Output is correct
13 Correct 23 ms 63740 KB Output is correct

Subtask #4
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 63828 KB Output is correct
2 Correct 24 ms 63972 KB Output is correct
3 Correct 23 ms 63740 KB Output is correct
4 Correct 24 ms 63972 KB Output is correct
5 Correct 26 ms 63832 KB Output is correct
6 Correct 23 ms 63960 KB Output is correct
7 Correct 27 ms 64004 KB Output is correct
8 Correct 23 ms 63836 KB Output is correct
9 Correct 23 ms 63836 KB Output is correct
10 Correct 23 ms 64004 KB Output is correct
11 Correct 23 ms 64092 KB Output is correct
12 Correct 23 ms 63836 KB Output is correct
13 Correct 23 ms 63740 KB Output is correct
14 Correct 28 ms 64652 KB Output is correct
15 Correct 26 ms 64604 KB Output is correct
16 Correct 24 ms 64604 KB Output is correct
17 Correct 25 ms 64672 KB Output is correct
18 Correct 24 ms 64508 KB Output is correct
19 Correct 27 ms 64456 KB Output is correct
20 Correct 30 ms 65220 KB Output is correct
21 Correct 24 ms 64092 KB Output is correct
22 Correct 23 ms 63836 KB Output is correct
23 Correct 43 ms 71148 KB Output is correct
24 Correct 28 ms 65344 KB Output is correct
25 Correct 46 ms 72020 KB Output is correct
26 Correct 27 ms 64092 KB Output is correct
27 Correct 24 ms 64196 KB Output is correct
28 Correct 24 ms 64088 KB Output is correct
29 Correct 27 ms 64088 KB Output is correct
30 Correct 63 ms 64596 KB Output is correct
31 Correct 62 ms 64636 KB Output is correct
32 Correct 62 ms 64456 KB Output is correct
33 Correct 80 ms 82736 KB Output is correct

Subtask #5
0.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 125 ms 93520 KB Output is correct
2 Correct 133 ms 93524 KB Output is correct
3 Correct 164 ms 94544 KB Output is correct
4 Correct 127 ms 94544 KB Output is correct
5 Correct 109 ms 87628 KB Output is correct
6 Correct 122 ms 87892 KB Output is correct
7 Correct 258 ms 111900 KB Output is correct
8 Correct 72 ms 77420 KB Output is correct
9 Correct 438 ms 160080 KB Output is correct
10 Correct 188 ms 102740 KB Output is correct
11 Correct 67 ms 73244 KB Output is correct
12 Correct 74 ms 77612 KB Output is correct
13 Correct 25 ms 63836 KB Output is correct
14 Correct 26 ms 63836 KB Output is correct
15 Correct 526 ms 150924 KB Output is correct
16 Execution timed out 6101 ms 81180 KB Time limit exceeded
17 Halted 0 ms 0 KB -

Subtask #6
0.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 63828 KB Output is correct
2 Correct 24 ms 63972 KB Output is correct
3 Correct 23 ms 63740 KB Output is correct
4 Correct 24 ms 63972 KB Output is correct
5 Correct 26 ms 63832 KB Output is correct
6 Correct 23 ms 63960 KB Output is correct
7 Correct 27 ms 64004 KB Output is correct
8 Correct 23 ms 63836 KB Output is correct
9 Correct 23 ms 63836 KB Output is correct
10 Correct 23 ms 64004 KB Output is correct
11 Correct 23 ms 64092 KB Output is correct
12 Correct 23 ms 63836 KB Output is correct
13 Correct 23 ms 63740 KB Output is correct
14 Correct 28 ms 64652 KB Output is correct
15 Correct 26 ms 64604 KB Output is correct
16 Correct 24 ms 64604 KB Output is correct
17 Correct 25 ms 64672 KB Output is correct
18 Correct 24 ms 64508 KB Output is correct
19 Correct 27 ms 64456 KB Output is correct
20 Correct 30 ms 65220 KB Output is correct
21 Correct 24 ms 64092 KB Output is correct
22 Correct 23 ms 63836 KB Output is correct
23 Correct 43 ms 71148 KB Output is correct
24 Correct 28 ms 65344 KB Output is correct
25 Correct 46 ms 72020 KB Output is correct
26 Correct 27 ms 64092 KB Output is correct
27 Correct 24 ms 64196 KB Output is correct
28 Correct 24 ms 64088 KB Output is correct
29 Correct 27 ms 64088 KB Output is correct
30 Correct 63 ms 64596 KB Output is correct
31 Correct 62 ms 64636 KB Output is correct
32 Correct 62 ms 64456 KB Output is correct
33 Correct 80 ms 82736 KB Output is correct
34 Correct 126 ms 93392 KB Output is correct
35 Correct 127 ms 93524 KB Output is correct
36 Correct 140 ms 94592 KB Output is correct
37 Correct 131 ms 94544 KB Output is correct
38 Correct 114 ms 87732 KB Output is correct
39 Correct 115 ms 87888 KB Output is correct
40 Correct 198 ms 111952 KB Output is correct
41 Correct 65 ms 77324 KB Output is correct
42 Correct 23 ms 63832 KB Output is correct
43 Correct 1746 ms 419752 KB Output is correct
44 Execution timed out 6068 ms 81212 KB Time limit exceeded
45 Halted 0 ms 0 KB -

Subtask #7
0.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 63832 KB Output is correct
2 Correct 20 ms 63832 KB Output is correct
3 Correct 21 ms 63836 KB Output is correct
4 Correct 21 ms 63836 KB Output is correct
5 Correct 20 ms 63656 KB Output is correct
6 Correct 951 ms 284372 KB Output is correct
7 Correct 321 ms 176460 KB Output is correct
8 Runtime error 1993 ms 1048576 KB Execution killed with signal 9
9 Halted 0 ms 0 KB -