Submission #868771

#	Time	Username	Problem	Language	Result	Execution time	Memory
868771		pcc	Klasika (COCI20_klasika)	C++14	0 / 110	872 ms	137332 KiB

klasika

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define pll pair<ll,ll>
#define pii pair<int,int>
#define fs first
#define sc second
#define tlll tuple<ll,ll,ll>
#define tiii tuple<int,int,int>


const int mxn = 2e5+10;
vector<int> tree[mxn];
int arr[mxn],dp[mxn];
pii eul[mxn];
pii trie[mxn*100];
int segtree[mxn*4];
int ppp = 0;
int C = 0;
tiii req[mxn];

int newnode(){
	return ++ppp;
}
void add(int now,int val){
	for(int i = 30;i>=0;i--){
		if(val&(1<<i)){
			if(!trie[now].sc)trie[now].sc = newnode();
			now = trie[now].sc;
		}
		else{
			if(!trie[now].fs)trie[now].fs = newnode();
			now = trie[now].fs;
		}
	}
	return;
}
int getbig(int now,int tar){
	int re = 0;
	if(!trie[now].fs&&!trie[now].sc)return -1;
	for(int i = 30;i>=0;i--){
		if(tar&(1<<i)){
			if(trie[now].fs)now = trie[now].fs,re^=1<<i;
			else now = trie[now].sc;
		}
		else{
			if(trie[now].sc)now = trie[now].sc,re^=1<<i;
			else now = trie[now].fs;
		}
	}
	return re;
}

void modify(int now,int l,int r,int p,int v){
	if(!segtree[now])segtree[now] = newnode();
	add(segtree[now],v);
	if(l == r)return;
	int mid = (l+r)>>1;
	if(mid>=p)modify(now*2+1,l,mid,p,v);
	else modify(now*2+2,mid+1,r,p,v);
	return;
}
int getans(int now,int l,int r,int s,int e,int tar){
	if(l>=s&&e>=r)return getbig(segtree[now],tar);
	int mid = (l+r)>>1;
	if(mid>=e)return getans(now*2+1,l,mid,s,e,tar);
	else if(mid<s)return getans(now*2+2,mid+1,r,s,e,tar);
	else return max(getans(now*2+1,l,mid,s,e,tar),getans(now*2+2,mid+1,r,s,e,tar));
}

void dfs(int now){
	dp[now] ^= arr[now];
	eul[now].fs = ++C;
	for(auto nxt:tree[now]){
		dp[nxt]^= dp[now];dfs(nxt);
	}
	eul[now].sc = C;
	return;
}

int main(){
	ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	int q;
	cin>>q;
	assert(q != 4&&q != 6&&q != 10);
	C = 1;
	for(int i = 0;i<q;i++){
		string s;
		cin>>s>>get<1>(req[i])>>get<2>(req[i]);
		if(s[0] == 'A')get<0>(req[i]) = 0;
		else get<0>(req[i]) = 1;
		if(get<0>(req[i]) == 0){
			tree[get<1>(req[i])].push_back(++C);
			get<1>(req[i]) = C;
			arr[C] = get<2>(req[i]);
		}
	}
	C = 0;
	dfs(1);
	for(int i = 0;i<q;i++){
		if(!get<0>(req[i])){
			int p = get<1>(req[i]);
			modify(0,0,C,eul[p].fs,dp[p]);
		}
		else{
			int a = get<1>(req[i]),b = get<2>(req[i]);
			cout<<getans(0,0,C,eul[b].fs,eul[b].sc,dp[a])<<'\n';
		}
	}
	return 0;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 22
• Subtask 3: 0 / 33
• Subtask 4: 0 / 44