oj.uz

Submission #107532

# Submission time Handle Problem Language Result Execution time Memory
107532 2019-04-25T01:45:18 Z aer0park None (KOI16_tree) C++14
28 / 100
 339 ms 27708 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+=23;
}
 
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 5248 KB Output is correct
2 Correct 8 ms 5248 KB Output is correct
3 Correct 6 ms 5120 KB Output is correct
4 Correct 7 ms 5248 KB Output is correct
5 Correct 7 ms 5120 KB Output is correct
6 Correct 7 ms 5120 KB Output is correct
7 Correct 8 ms 5148 KB Output is correct
8 Correct 7 ms 5296 KB Output is correct
9 Correct 7 ms 5120 KB Output is correct
10 Correct 8 ms 5120 KB Output is correct

Subtask #2
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5248 KB Output is correct
2 Correct 8 ms 5248 KB Output is correct
3 Correct 6 ms 5120 KB Output is correct
4 Correct 7 ms 5248 KB Output is correct
5 Correct 7 ms 5120 KB Output is correct
6 Correct 7 ms 5120 KB Output is correct
7 Correct 8 ms 5148 KB Output is correct
8 Correct 7 ms 5296 KB Output is correct
9 Correct 7 ms 5120 KB Output is correct
10 Correct 8 ms 5120 KB Output is correct
11 Correct 6 ms 5120 KB Output is correct
12 Correct 7 ms 5120 KB Output is correct
13 Correct 7 ms 5120 KB Output is correct
14 Correct 7 ms 5120 KB Output is correct
15 Correct 8 ms 5120 KB Output is correct
16 Correct 8 ms 5120 KB Output is correct
17 Incorrect 8 ms 5120 KB Output isn't correct
18 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5248 KB Output is correct
2 Correct 8 ms 5248 KB Output is correct
3 Correct 6 ms 5120 KB Output is correct
4 Correct 7 ms 5248 KB Output is correct
5 Correct 7 ms 5120 KB Output is correct
6 Correct 7 ms 5120 KB Output is correct
7 Correct 8 ms 5148 KB Output is correct
8 Correct 7 ms 5296 KB Output is correct
9 Correct 7 ms 5120 KB Output is correct
10 Correct 8 ms 5120 KB Output is correct
11 Correct 6 ms 5120 KB Output is correct
12 Correct 7 ms 5120 KB Output is correct
13 Correct 7 ms 5120 KB Output is correct
14 Correct 7 ms 5120 KB Output is correct
15 Correct 8 ms 5120 KB Output is correct
16 Correct 8 ms 5120 KB Output is correct
17 Incorrect 8 ms 5120 KB Output isn't correct
18 Halted 0 ms 0 KB -

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5248 KB Output is correct
2 Correct 8 ms 5248 KB Output is correct
3 Correct 6 ms 5120 KB Output is correct
4 Correct 7 ms 5248 KB Output is correct
5 Correct 7 ms 5120 KB Output is correct
6 Correct 7 ms 5120 KB Output is correct
7 Correct 8 ms 5148 KB Output is correct
8 Correct 7 ms 5296 KB Output is correct
9 Correct 7 ms 5120 KB Output is correct
10 Correct 8 ms 5120 KB Output is correct
11 Correct 339 ms 27524 KB Output is correct
12 Correct 265 ms 27480 KB Output is correct
13 Correct 283 ms 27480 KB Output is correct
14 Correct 337 ms 27568 KB Output is correct
15 Correct 279 ms 27564 KB Output is correct
16 Correct 269 ms 27640 KB Output is correct
17 Correct 302 ms 27692 KB Output is correct
18 Correct 270 ms 27588 KB Output is correct
19 Correct 274 ms 27708 KB Output is correct
20 Correct 254 ms 27676 KB Output is correct
21 Correct 293 ms 27648 KB Output is correct

Subtask #5
0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5248 KB Output is correct
2 Correct 8 ms 5248 KB Output is correct
3 Correct 6 ms 5120 KB Output is correct
4 Correct 7 ms 5248 KB Output is correct
5 Correct 7 ms 5120 KB Output is correct
6 Correct 7 ms 5120 KB Output is correct
7 Correct 8 ms 5148 KB Output is correct
8 Correct 7 ms 5296 KB Output is correct
9 Correct 7 ms 5120 KB Output is correct
10 Correct 8 ms 5120 KB Output is correct
11 Correct 6 ms 5120 KB Output is correct
12 Correct 7 ms 5120 KB Output is correct
13 Correct 7 ms 5120 KB Output is correct
14 Correct 7 ms 5120 KB Output is correct
15 Correct 8 ms 5120 KB Output is correct
16 Correct 8 ms 5120 KB Output is correct
17 Incorrect 8 ms 5120 KB Output isn't correct
18 Halted 0 ms 0 KB -