oj.uz

Submission #107507

# Submission time Handle Problem Language Result Execution time Memory
107507 2019-04-24T23:15:02 Z aer0park None (KOI16_tree) C++14
28 / 100
 315 ms 27880 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++;
}
 
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 6 ms 5248 KB Output is correct
2 Correct 7 ms 5120 KB Output is correct
3 Correct 6 ms 5248 KB Output is correct
4 Correct 6 ms 5248 KB Output is correct
5 Correct 6 ms 5248 KB Output is correct
6 Correct 7 ms 5248 KB Output is correct
7 Correct 6 ms 5344 KB Output is correct
8 Correct 9 ms 5248 KB Output is correct
9 Correct 8 ms 5120 KB Output is correct
10 Correct 6 ms 5120 KB Output is correct

Subtask #2
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 5248 KB Output is correct
2 Correct 7 ms 5120 KB Output is correct
3 Correct 6 ms 5248 KB Output is correct
4 Correct 6 ms 5248 KB Output is correct
5 Correct 6 ms 5248 KB Output is correct
6 Correct 7 ms 5248 KB Output is correct
7 Correct 6 ms 5344 KB Output is correct
8 Correct 9 ms 5248 KB Output is correct
9 Correct 8 ms 5120 KB Output is correct
10 Correct 6 ms 5120 KB Output is correct
11 Incorrect 6 ms 5120 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 5248 KB Output is correct
2 Correct 7 ms 5120 KB Output is correct
3 Correct 6 ms 5248 KB Output is correct
4 Correct 6 ms 5248 KB Output is correct
5 Correct 6 ms 5248 KB Output is correct
6 Correct 7 ms 5248 KB Output is correct
7 Correct 6 ms 5344 KB Output is correct
8 Correct 9 ms 5248 KB Output is correct
9 Correct 8 ms 5120 KB Output is correct
10 Correct 6 ms 5120 KB Output is correct
11 Incorrect 6 ms 5120 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 5248 KB Output is correct
2 Correct 7 ms 5120 KB Output is correct
3 Correct 6 ms 5248 KB Output is correct
4 Correct 6 ms 5248 KB Output is correct
5 Correct 6 ms 5248 KB Output is correct
6 Correct 7 ms 5248 KB Output is correct
7 Correct 6 ms 5344 KB Output is correct
8 Correct 9 ms 5248 KB Output is correct
9 Correct 8 ms 5120 KB Output is correct
10 Correct 6 ms 5120 KB Output is correct
11 Correct 269 ms 27596 KB Output is correct
12 Correct 250 ms 27572 KB Output is correct
13 Correct 239 ms 27764 KB Output is correct
14 Correct 315 ms 27640 KB Output is correct
15 Correct 261 ms 27664 KB Output is correct
16 Correct 260 ms 27516 KB Output is correct
17 Correct 278 ms 27784 KB Output is correct
18 Correct 235 ms 27612 KB Output is correct
19 Correct 232 ms 27880 KB Output is correct
20 Correct 240 ms 27868 KB Output is correct
21 Correct 250 ms 27816 KB Output is correct

Subtask #5
0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 5248 KB Output is correct
2 Correct 7 ms 5120 KB Output is correct
3 Correct 6 ms 5248 KB Output is correct
4 Correct 6 ms 5248 KB Output is correct
5 Correct 6 ms 5248 KB Output is correct
6 Correct 7 ms 5248 KB Output is correct
7 Correct 6 ms 5344 KB Output is correct
8 Correct 9 ms 5248 KB Output is correct
9 Correct 8 ms 5120 KB Output is correct
10 Correct 6 ms 5120 KB Output is correct
11 Incorrect 6 ms 5120 KB Output isn't correct
12 Halted 0 ms 0 KB -