oj.uz

Submission #107542

# Submission time Handle Problem Language Result Execution time Memory
107542 2019-04-25T01:54:41 Z aer0park None (KOI16_tree) C++14
41 / 100
 276 ms 28092 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
 
ll n,q,cnt=1,qy=1;
ll ind[200004],pw[200004],chd[200004],par[200004];
vector<ll> g[200004];  //원래 번호 
 
ll val(ll a)
{
	ll ret=0;
	while(a)
	{
		ret+=pw[a];
		a-=(a&-a);	
	}	
	return ret;
}
 
void upd(ll a,ll x)
{
	while(a<=n)
	{
		pw[a]+=x;
		a+=(a&-a);
	}	
}
 
void updrange(ll a,ll sz)
{
	upd(a,qy);
	upd(a+sz,-qy);
	qy=20000004-a;
}
 
ll dfs(ll a,ll p)
{
	ll ret=1;
	ind[a]=cnt++,par[ind[a]]=ind[p];
	for(int i=0;i<g[a].size();i++)
		ret+=dfs(g[a][i],a);
	chd[ind[a]]=ret;
	return ret;
}
 
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(NULL);
	cin>>n>>q;
	for(int i=2;i<=n;i++)
	{
		ll a;cin>>a;
		g[a].push_back(i);
	}    
	dfs(1,0);
	for(int i=0;i<q;i++)
	{
		ll b,c,d;cin>>b>>c>>d;
		if(d==0)
		{
			if(val(ind[b])==val(ind[c]))
				cout<<"YES"<<"\n";
			else
				cout<<"NO"<<"\n";
		}
		else
		{
			if(val(ind[b])==val(ind[c]))
			{
				cout<<"YES"<<"\n";
				ll f=ind[b];
				if(val(f)==val(par[f]))
					updrange(f,chd[f]);
			}
			else
			{
				cout<<"NO"<<"\n";
				ll f=ind[c];
				if(val(f)==val(par[f]))
					updrange(f,chd[f]);	
			}
		}
	}
    return 0;
}

Compilation message

tree.cpp: In function 'll dfs(ll, ll)':
tree.cpp:42:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<g[a].size();i++)
              ~^~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5256 KB Output is correct
2 Correct 7 ms 5248 KB Output is correct
3 Correct 7 ms 5248 KB Output is correct
4 Correct 6 ms 5120 KB Output is correct
5 Correct 6 ms 5248 KB Output is correct
6 Correct 7 ms 5248 KB Output is correct
7 Correct 7 ms 5248 KB Output is correct
8 Correct 8 ms 5120 KB Output is correct
9 Correct 6 ms 5120 KB Output is correct
10 Correct 6 ms 5120 KB Output is correct

Subtask #2
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5256 KB Output is correct
2 Correct 7 ms 5248 KB Output is correct
3 Correct 7 ms 5248 KB Output is correct
4 Correct 6 ms 5120 KB Output is correct
5 Correct 6 ms 5248 KB Output is correct
6 Correct 7 ms 5248 KB Output is correct
7 Correct 7 ms 5248 KB Output is correct
8 Correct 8 ms 5120 KB Output is correct
9 Correct 6 ms 5120 KB Output is correct
10 Correct 6 ms 5120 KB Output is correct
11 Correct 7 ms 5120 KB Output is correct
12 Correct 7 ms 5120 KB Output is correct
13 Correct 6 ms 5120 KB Output is correct
14 Correct 9 ms 5092 KB Output is correct
15 Correct 8 ms 5120 KB Output is correct
16 Correct 8 ms 5120 KB Output is correct
17 Correct 7 ms 5120 KB Output is correct
18 Correct 7 ms 5120 KB Output is correct
19 Correct 6 ms 5120 KB Output is correct
20 Correct 6 ms 5120 KB Output is correct
21 Correct 7 ms 5120 KB Output is correct

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5256 KB Output is correct
2 Correct 7 ms 5248 KB Output is correct
3 Correct 7 ms 5248 KB Output is correct
4 Correct 6 ms 5120 KB Output is correct
5 Correct 6 ms 5248 KB Output is correct
6 Correct 7 ms 5248 KB Output is correct
7 Correct 7 ms 5248 KB Output is correct
8 Correct 8 ms 5120 KB Output is correct
9 Correct 6 ms 5120 KB Output is correct
10 Correct 6 ms 5120 KB Output is correct
11 Correct 7 ms 5120 KB Output is correct
12 Correct 7 ms 5120 KB Output is correct
13 Correct 6 ms 5120 KB Output is correct
14 Correct 9 ms 5092 KB Output is correct
15 Correct 8 ms 5120 KB Output is correct
16 Correct 8 ms 5120 KB Output is correct
17 Correct 7 ms 5120 KB Output is correct
18 Correct 7 ms 5120 KB Output is correct
19 Correct 6 ms 5120 KB Output is correct
20 Correct 6 ms 5120 KB Output is correct
21 Correct 7 ms 5120 KB Output is correct
22 Correct 66 ms 5760 KB Output is correct
23 Incorrect 84 ms 5792 KB Output isn't correct
24 Halted 0 ms 0 KB -

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5256 KB Output is correct
2 Correct 7 ms 5248 KB Output is correct
3 Correct 7 ms 5248 KB Output is correct
4 Correct 6 ms 5120 KB Output is correct
5 Correct 6 ms 5248 KB Output is correct
6 Correct 7 ms 5248 KB Output is correct
7 Correct 7 ms 5248 KB Output is correct
8 Correct 8 ms 5120 KB Output is correct
9 Correct 6 ms 5120 KB Output is correct
10 Correct 6 ms 5120 KB Output is correct
11 Correct 242 ms 27604 KB Output is correct
12 Correct 256 ms 27516 KB Output is correct
13 Correct 248 ms 27600 KB Output is correct
14 Correct 276 ms 27512 KB Output is correct
15 Correct 275 ms 27768 KB Output is correct
16 Correct 258 ms 27512 KB Output is correct
17 Correct 261 ms 28092 KB Output is correct
18 Correct 243 ms 27640 KB Output is correct
19 Correct 227 ms 27768 KB Output is correct
20 Correct 233 ms 27768 KB Output is correct
21 Correct 218 ms 27512 KB Output is correct

Subtask #5
0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5256 KB Output is correct
2 Correct 7 ms 5248 KB Output is correct
3 Correct 7 ms 5248 KB Output is correct
4 Correct 6 ms 5120 KB Output is correct
5 Correct 6 ms 5248 KB Output is correct
6 Correct 7 ms 5248 KB Output is correct
7 Correct 7 ms 5248 KB Output is correct
8 Correct 8 ms 5120 KB Output is correct
9 Correct 6 ms 5120 KB Output is correct
10 Correct 6 ms 5120 KB Output is correct
11 Correct 7 ms 5120 KB Output is correct
12 Correct 7 ms 5120 KB Output is correct
13 Correct 6 ms 5120 KB Output is correct
14 Correct 9 ms 5092 KB Output is correct
15 Correct 8 ms 5120 KB Output is correct
16 Correct 8 ms 5120 KB Output is correct
17 Correct 7 ms 5120 KB Output is correct
18 Correct 7 ms 5120 KB Output is correct
19 Correct 6 ms 5120 KB Output is correct
20 Correct 6 ms 5120 KB Output is correct
21 Correct 7 ms 5120 KB Output is correct
22 Correct 66 ms 5760 KB Output is correct
23 Incorrect 84 ms 5792 KB Output isn't correct
24 Halted 0 ms 0 KB -