Submission #336402

#	Time	Username	Problem	Language	Result	Execution time	Memory
336402		AriaH	Klasika (COCI20_klasika)	C++11	0 / 110	530 ms	375020 KiB

klasika

/** I can do this all day **/

#pragma GCC optimize("O2")
#include <bits/stdc++.h>
using namespace std;

typedef long long                   ll;
typedef long double                 ld;
typedef pair<int,int>               pii;
typedef pair<ll,ll>                 pll;
#define all(x)                      (x).begin(),(x).end()
#define F                           first
#define S                           second
#define Mp                          make_pair
#define fast_io                     ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define file_io                     freopen("in.txt" , "r+" , stdin) ; freopen("out.txt" , "w+" , stdout);
#define endl                        "\n"

const int N = 2e5 + 10;
const int M = 16 * N;
const ll mod = 1e9 + 7;
const ll mod2 = 998244353;
const ll inf = 8e18;
const int LOG = 30;

char C[N];

int q, n = 1, ptr, Cnt = 1, w[N], St[N], Fi[N], yal[N], child[N][2];

set < int > st[M];

vector < int > G[N];

pair < string, pii > Q[N];

void dfs(int v)
{
    St[v] = ++ptr;
    for(auto u : G[v])
    {
	w[u] = w[v] ^ yal[u];
	dfs(u);
    }
    Fi[v] = ptr;
}

/// add trie -> x = w ash ta root, v = rasi ke mikhai add bokoni

inline void add_trie(int x, int v)
{
    int node = 1;
    for(int T = 30; ~T; T --)
    {
	int rem = x >> T & 1;
	if(child[node][rem] == 0) /// set nashode
	{
	    child[node][rem] = ++Cnt;
	}
	node = child[node][rem];
	st[node].insert(St[v]);
    }
}

/// check v, node -> aya toye set trie v rasi hast ke toye sub node bashe ya na

inline bool check(int v, int node)
{
    auto it = st[v].lower_bound(St[node]);
    if(it == st[v].end() || *it > Fi[node]) return 0;
    return 1;
}

/// ask trie x, b -> maximum xor ke adadmoon = x, va toye sub v bashe

inline int ask_trie(int x, int b)
{
    int node = 1, tot = 0;
    for(int T = 30; ~T; T --)
    {
	int rem = x >> T & 1;
	int other = child[node][1 ^ rem];
	if(check(other, b))
	{
	    tot += (1 << T);
	    node = other;
	}
	else
	{
	    node = child[node][rem];
	}
    }
    return tot;
}

int main()
{
    scanf("%d", &q);
    for(int i = 1; i <= q; i ++)
    {
	string s;
	int a, b;
	scanf("%s%d%d", C, &a, &b);
	s = C;
	Q[i] = Mp(s, Mp(a, b));
	if(s == "Add")
	{
	    ++n;
	    G[a].push_back(n);
	    yal[n] = b;
	}
    }
    dfs(1);
    int _n = 1;
    for(int i = 1; i <= q; i ++)
    {
	if(Q[i].F == "Add")
	{
	    _n ++;
	    add_trie(w[_n], _n);
	}
	else
	{
	    printf("%d\n", ask_trie(w[Q[i].S.F], Q[i].S.S));
	}
    }
    return 0;
}
/*!
        stay away from negative people they have a problem for every solution !
*/
/*
4
Add 1 5
Query 1 1
Add 1 7
Query 1 1 
*/

Compilation message (stderr)

klasika.cpp: In function 'int main()':
klasika.cpp:97:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   97 |     scanf("%d", &q);
      |     ~~~~~^~~~~~~~~~
klasika.cpp:102:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  102 |  scanf("%s%d%d", C, &a, &b);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~

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