oj.uz

Submission #223325

# Submission time Handle Problem Language Result Execution time Memory
223325 2020-04-15T07:19:04 Z oolimry Klasika (COCI20_klasika) C++14
33 / 110
 5000 ms 423072 KB 
#include <bits/stdc++.h>
#pragma GCC target ("avx2")
#pragma GCC optimization ("Ofast")
#pragma GCC optimization ("unroll-loops")
#pragma comment(linker, "/stack:200000000")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

using namespace std;
 
int n = 1;
int cnt = 0;
vector<int> adj[200005];
int low[200005];
int high[200005];
int XOR[200005];
 
void dfs(int u){
	low[u] = cnt;
	high[u] = cnt;
	cnt++;
	for(int v : adj[u]){
		dfs(v);
		high[u] = max(high[u], high[v]);
	}
}
 
typedef pair<int,int> ii;
vector<ii> queries;

struct custom_hash {
    typedef long long ll;
    typedef unsigned long long ull;
    const ull FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
    static ull splitmix64(ull x) {
        // http://xorshift.di.unimi.it/splitmix64.c
        x += 0x9e3779b97f4a7c15;
        x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
        x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
        return x ^ (x >> 31);
    }

    size_t operator()(ll x) const {
        return splitmix64(x + FIXED_RANDOM);
    }
    size_t operator()(const pair<int,int> &i)const{
        return splitmix64((((ll)i.first)^(((ll)i.second)<<32))+FIXED_RANDOM);
    }
};

unordered_map<int, set<int>, custom_hash > m[33];
 
int main(){
	//freopen("i.txt","r",stdin);
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	int Q; cin >> Q;
	queries.push_back(ii(-1,0));
	
	for(int i = 0;i <= 30;i++){
		m[i].reserve(4096);
		//changes number of buckets, make it a power of 2 to be fast
		m[i].max_load_factor(0.25);
	}
	
	while(Q--){
		string s; int a, b; 
		cin >> s >> a >> b;
		if(s[0] == 'A' || s[0] == 'a'){
			a--;
			assert(a < n);
			adj[a].push_back(n);
			XOR[n] = XOR[a] ^ b;
			queries.push_back(ii(-1,n));
			n++;
		}
		else{
			assert(a-1 < n);
			assert(b-1 < n);
			queries.push_back(ii(a-1,b-1));
		}
	}
	
	
	dfs(0);
	//for(int i = 0;i < n;i++) cout << low[i] << " " << high[i] << "\n";
	
	for(ii q : queries){
		//cout << q.first << " " << q.second << "\n";
		
		if(q.first == -1){
			int pos = low[q.second];
			int x = XOR[q.second];
			
			for(int b = 0;b <= 30;b++){
				m[b][x].insert(pos);
				x ^= ((x & (1<<b)));
			}
			
			continue;
		}
		
		int other = XOR[q.first];
		int L = low[q.second], R = high[q.second];
		int cur = 0;
		for(int b = 30;b >= 0;b--){
			if((other & (1<<b)) == 0) cur ^= (1 << b);
			
			set<int> &s = m[b][cur];
			auto it = s.lower_bound(L);
			if(it == s.end() || *it > R) cur ^= (1 << b);
		}
		
		cout << (cur ^ other) << "\n";
		
	}
}

Compilation message

klasika.cpp:3:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization ("Ofast")
 
klasika.cpp:4:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization ("unroll-loops")
 
klasika.cpp:5:0: warning: ignoring #pragma comment  [-Wunknown-pragmas]
 #pragma comment(linker, "/stack:200000000")

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 6400 KB Output is correct
2 Correct 9 ms 6400 KB Output is correct
3 Correct 10 ms 6528 KB Output is correct
4 Correct 10 ms 6704 KB Output is correct
5 Correct 9 ms 6272 KB Output is correct
6 Correct 10 ms 6400 KB Output is correct
7 Correct 9 ms 6528 KB Output is correct
8 Correct 9 ms 6656 KB Output is correct
9 Correct 12 ms 6272 KB Output is correct
10 Correct 9 ms 6528 KB Output is correct
11 Correct 9 ms 6656 KB Output is correct
12 Correct 9 ms 6656 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 6400 KB Output is correct
2 Correct 9 ms 6400 KB Output is correct
3 Correct 10 ms 6528 KB Output is correct
4 Correct 10 ms 6704 KB Output is correct
5 Correct 9 ms 6272 KB Output is correct
6 Correct 10 ms 6400 KB Output is correct
7 Correct 9 ms 6528 KB Output is correct
8 Correct 9 ms 6656 KB Output is correct
9 Correct 12 ms 6272 KB Output is correct
10 Correct 9 ms 6528 KB Output is correct
11 Correct 9 ms 6656 KB Output is correct
12 Correct 9 ms 6656 KB Output is correct
13 Correct 16 ms 8064 KB Output is correct
14 Correct 20 ms 10112 KB Output is correct
15 Correct 25 ms 11264 KB Output is correct
16 Correct 28 ms 12160 KB Output is correct
17 Correct 16 ms 7936 KB Output is correct
18 Correct 21 ms 9984 KB Output is correct
19 Correct 24 ms 11084 KB Output is correct
20 Correct 28 ms 12032 KB Output is correct
21 Correct 17 ms 7936 KB Output is correct
22 Correct 25 ms 9984 KB Output is correct
23 Correct 34 ms 11008 KB Output is correct
24 Correct 27 ms 12032 KB Output is correct

Subtask #3
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 2391 ms 175440 KB Output is correct
2 Correct 4675 ms 319028 KB Output is correct
3 Execution timed out 5049 ms 423072 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #4
0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 6400 KB Output is correct
2 Correct 9 ms 6400 KB Output is correct
3 Correct 10 ms 6528 KB Output is correct
4 Correct 10 ms 6704 KB Output is correct
5 Correct 9 ms 6272 KB Output is correct
6 Correct 10 ms 6400 KB Output is correct
7 Correct 9 ms 6528 KB Output is correct
8 Correct 9 ms 6656 KB Output is correct
9 Correct 12 ms 6272 KB Output is correct
10 Correct 9 ms 6528 KB Output is correct
11 Correct 9 ms 6656 KB Output is correct
12 Correct 9 ms 6656 KB Output is correct
13 Correct 16 ms 8064 KB Output is correct
14 Correct 20 ms 10112 KB Output is correct
15 Correct 25 ms 11264 KB Output is correct
16 Correct 28 ms 12160 KB Output is correct
17 Correct 16 ms 7936 KB Output is correct
18 Correct 21 ms 9984 KB Output is correct
19 Correct 24 ms 11084 KB Output is correct
20 Correct 28 ms 12032 KB Output is correct
21 Correct 17 ms 7936 KB Output is correct
22 Correct 25 ms 9984 KB Output is correct
23 Correct 34 ms 11008 KB Output is correct
24 Correct 27 ms 12032 KB Output is correct
25 Correct 2391 ms 175440 KB Output is correct
26 Correct 4675 ms 319028 KB Output is correct
27 Execution timed out 5049 ms 423072 KB Time limit exceeded
28 Halted 0 ms 0 KB -