oj.uz

Submission #107530

# Submission time Handle Problem Language Result Execution time Memory
107530 2019-04-25T01:43:29 Z aer0park None (KOI16_tree) C++14
28 / 100
 304 ms 27968 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])&&par[f]!=0)
					updrange(f,chd[f]);
			}
			else
			{
				cout<<"NO"<<"\n";
				ll f=ind[c];
				if(val(f)==val(par[f])&&par[f]!=0)
					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 5248 KB Output is correct
3 Correct 6 ms 5248 KB Output is correct
4 Correct 6 ms 4992 KB Output is correct
5 Correct 7 ms 5248 KB Output is correct
6 Correct 8 ms 5248 KB Output is correct
7 Correct 6 ms 5120 KB Output is correct
8 Correct 8 ms 5120 KB Output is correct
9 Correct 7 ms 5248 KB Output is correct
10 Correct 8 ms 5248 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 5248 KB Output is correct
3 Correct 6 ms 5248 KB Output is correct
4 Correct 6 ms 4992 KB Output is correct
5 Correct 7 ms 5248 KB Output is correct
6 Correct 8 ms 5248 KB Output is correct
7 Correct 6 ms 5120 KB Output is correct
8 Correct 8 ms 5120 KB Output is correct
9 Correct 7 ms 5248 KB Output is correct
10 Correct 8 ms 5248 KB Output is correct
11 Incorrect 7 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 5248 KB Output is correct
3 Correct 6 ms 5248 KB Output is correct
4 Correct 6 ms 4992 KB Output is correct
5 Correct 7 ms 5248 KB Output is correct
6 Correct 8 ms 5248 KB Output is correct
7 Correct 6 ms 5120 KB Output is correct
8 Correct 8 ms 5120 KB Output is correct
9 Correct 7 ms 5248 KB Output is correct
10 Correct 8 ms 5248 KB Output is correct
11 Incorrect 7 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 5248 KB Output is correct
3 Correct 6 ms 5248 KB Output is correct
4 Correct 6 ms 4992 KB Output is correct
5 Correct 7 ms 5248 KB Output is correct
6 Correct 8 ms 5248 KB Output is correct
7 Correct 6 ms 5120 KB Output is correct
8 Correct 8 ms 5120 KB Output is correct
9 Correct 7 ms 5248 KB Output is correct
10 Correct 8 ms 5248 KB Output is correct
11 Correct 249 ms 27704 KB Output is correct
12 Correct 299 ms 27612 KB Output is correct
13 Correct 264 ms 27808 KB Output is correct
14 Correct 248 ms 27640 KB Output is correct
15 Correct 304 ms 27896 KB Output is correct
16 Correct 252 ms 27640 KB Output is correct
17 Correct 242 ms 27896 KB Output is correct
18 Correct 242 ms 27836 KB Output is correct
19 Correct 235 ms 27900 KB Output is correct
20 Correct 250 ms 27968 KB Output is correct
21 Correct 262 ms 27800 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 5248 KB Output is correct
3 Correct 6 ms 5248 KB Output is correct
4 Correct 6 ms 4992 KB Output is correct
5 Correct 7 ms 5248 KB Output is correct
6 Correct 8 ms 5248 KB Output is correct
7 Correct 6 ms 5120 KB Output is correct
8 Correct 8 ms 5120 KB Output is correct
9 Correct 7 ms 5248 KB Output is correct
10 Correct 8 ms 5248 KB Output is correct
11 Incorrect 7 ms 5120 KB Output isn't correct
12 Halted 0 ms 0 KB -