oj.uz

Submission #256805

# Submission time Handle Problem Language Result Execution time Memory
256805 2020-08-03T08:46:02 Z MrRobot_28 Klasika (COCI20_klasika) C++17
33 / 110
 1040 ms 524288 KB 
#include<bits/stdc++.h>
 
using namespace std;
#define int long long
int n = 1;
vector <vector <pair <int, int> > > g;
vector <int> h, tin, tout;
int timer = 0;
void dfs(int v, int p = -1)
{
	tin[v] = timer++;
	for(int i = 0; i < g[v].size(); i++)
	{
		int to = g[v][i].first;
		int w = g[v][i].second;
		if(to != p)
		{
			h[to] = h[v] ^ w;
			dfs(to, v);
		}
	}
	tout[v] = timer - 1;
}
struct node{
	node* left;
	node* right;
	node(){
	left = NULL;
	right = NULL;};
};
vector <node*> tree;
void go_down(node* &w, int i, int val)
{
	if(i < 0)
	{
		return;
	}
	if(val & (1LL << i))
	{
		if(!w -> right)
		{
			w -> right = new node();
		}
		go_down(w -> right, i - 1, val);
	}
	else
	{
		if(!w -> left)
		{
			w -> left = new node();
		}
		go_down(w -> left, i - 1, val);
	}
}
void update(int v, int l, int r, int ind, int val)
{
	go_down(tree[v], 30, val);
	if(l == r)
	{
		return;
	}
	if(ind <= (r + l) / 2)
	{
		update(v * 2, l, (r + l) / 2, ind, val);
	}
	else
	{
		update(v * 2 + 1, (r + l) / 2 + 1, r, ind, val);
	}
}
int ans(int v, int l, int r, int al, int ar, int val)
{
	if(l >= al && r <= ar)
	{
		if(!tree[v] -> left && !tree[v] -> right)
		{
			return val;
		}
		int val1 = (1LL << 31) - val - 1;
		node* w = tree[v];
		int valans = 0;
		for(int i = 30; i >= 0; i--)
		{
			if(val1 & (1LL << i))
			{
				if(!w -> right)
				{
					w = w -> left;
				}
				else
				{
					w = w -> right;
					valans += (1LL << i);
				}
			}
			else
			{
				if(!w -> left)
				{
					w = w -> right;
					valans += (1LL << i);
				}
				else
				{
					w = w -> left;
				}
			}
		}
		return valans;
	}
	else if(l <= ar && r >= al)
	{
		int t1 = ans(v * 2, l, (r + l) / 2, al, ar, val);
		int t2 = ans(v * 2 + 1, (r + l) / 2 + 1, r, al, ar, val);
		if((t1 ^ val) > (t2 ^ val))
		{
			return t1;
		}
		return t2;
	}
	else
	{
		return val;
	}
}
signed main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
	int q;
	cin >> q;
	vector <string> type(q);
	vector <pair <int, int> > mass(q);
	for(int i = 0; i < q; i++){
		cin >> type[i];
		cin >> mass[i].first >> mass[i].second;
		if(type[i] == "Add"){
			n++;
		}
	}
	g.resize(n);
	h.resize(n);
	tin.resize(n);
	tout.resize(n);
	int cnt = 1;
	for(int i = 0; i < q; i++)
	{
		if(type[i] == "Add")
		{
			mass[i].first--;
			g[mass[i].first].push_back({cnt, mass[i].second});
			cnt++;
		}
	}
	dfs(0);
	tree.resize(4 * n);
	for(int i = 0; i < 4 * n; i++){
		tree[i] = new node();
	}
	cnt = 1;
	update(1, 0, n - 1, tin[0], 0);
	for(int i = 0; i < q; i++)
	{
		if(type[i] == "Add")
		{
			update(1, 0, n - 1, tin[cnt], h[cnt]);
			cnt++;
		}
		else
		{
			mass[i].first--;
			mass[i].second--;
			int val = h[mass[i].first];
			int val1 = ans(1, 0, n - 1, tin[mass[i].second], tout[mass[i].second], val);
			cout << (val ^ val1) << "\n";
		}
	}
	return 0;
}

Compilation message

klasika.cpp: In function 'void dfs(long long int, long long int)':
klasika.cpp:12:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < g[v].size(); i++)
                 ~~^~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 640 KB Output is correct
2 Correct 1 ms 896 KB Output is correct
3 Correct 2 ms 1152 KB Output is correct
4 Correct 2 ms 1536 KB Output is correct
5 Correct 1 ms 640 KB Output is correct
6 Correct 1 ms 896 KB Output is correct
7 Correct 3 ms 1152 KB Output is correct
8 Correct 4 ms 1536 KB Output is correct
9 Correct 1 ms 640 KB Output is correct
10 Correct 1 ms 1024 KB Output is correct
11 Correct 2 ms 1280 KB Output is correct
12 Correct 2 ms 1536 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 640 KB Output is correct
2 Correct 1 ms 896 KB Output is correct
3 Correct 2 ms 1152 KB Output is correct
4 Correct 2 ms 1536 KB Output is correct
5 Correct 1 ms 640 KB Output is correct
6 Correct 1 ms 896 KB Output is correct
7 Correct 3 ms 1152 KB Output is correct
8 Correct 4 ms 1536 KB Output is correct
9 Correct 1 ms 640 KB Output is correct
10 Correct 1 ms 1024 KB Output is correct
11 Correct 2 ms 1280 KB Output is correct
12 Correct 2 ms 1536 KB Output is correct
13 Correct 14 ms 3968 KB Output is correct
14 Correct 14 ms 7936 KB Output is correct
15 Correct 30 ms 12288 KB Output is correct
16 Correct 39 ms 16120 KB Output is correct
17 Correct 11 ms 3840 KB Output is correct
18 Correct 22 ms 7800 KB Output is correct
19 Correct 21 ms 12032 KB Output is correct
20 Correct 26 ms 15968 KB Output is correct
21 Correct 9 ms 3840 KB Output is correct
22 Correct 13 ms 7808 KB Output is correct
23 Correct 20 ms 12032 KB Output is correct
24 Correct 24 ms 15996 KB Output is correct

Subtask #3
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1040 ms 503132 KB Output is correct
2 Runtime error 1024 ms 524288 KB Execution killed with signal 9 (could be triggered by violating memory limits)
3 Halted 0 ms 0 KB -

Subtask #4
0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 640 KB Output is correct
2 Correct 1 ms 896 KB Output is correct
3 Correct 2 ms 1152 KB Output is correct
4 Correct 2 ms 1536 KB Output is correct
5 Correct 1 ms 640 KB Output is correct
6 Correct 1 ms 896 KB Output is correct
7 Correct 3 ms 1152 KB Output is correct
8 Correct 4 ms 1536 KB Output is correct
9 Correct 1 ms 640 KB Output is correct
10 Correct 1 ms 1024 KB Output is correct
11 Correct 2 ms 1280 KB Output is correct
12 Correct 2 ms 1536 KB Output is correct
13 Correct 14 ms 3968 KB Output is correct
14 Correct 14 ms 7936 KB Output is correct
15 Correct 30 ms 12288 KB Output is correct
16 Correct 39 ms 16120 KB Output is correct
17 Correct 11 ms 3840 KB Output is correct
18 Correct 22 ms 7800 KB Output is correct
19 Correct 21 ms 12032 KB Output is correct
20 Correct 26 ms 15968 KB Output is correct
21 Correct 9 ms 3840 KB Output is correct
22 Correct 13 ms 7808 KB Output is correct
23 Correct 20 ms 12032 KB Output is correct
24 Correct 24 ms 15996 KB Output is correct
25 Correct 1040 ms 503132 KB Output is correct
26 Runtime error 1024 ms 524288 KB Execution killed with signal 9 (could be triggered by violating memory limits)
27 Halted 0 ms 0 KB -