oj.uz

Submission #843607

# Submission time Handle Problem Language Result Execution time Memory
843607 2023-09-04T08:29:27 Z fanwen Klasika (COCI20_klasika) C++17
110 / 110
 2029 ms 429708 KB 
// Author : SamPV - HaiHoang
#pragma GCC optimize("O3")
#pragma GCC target("avx,avx2,fma")
#include <bits/stdc++.h>

#define MASK(x) (1LL << (x))
#define BIT(x, k) (((x) >> (k)) & 1LL)
#define For(i, a, b)  for (int i = (a); i <= (b); ++i)
#define Ford(i, a, b) for (int i = (a); i >= (b); --i)
#define Rep(i, n) for (int i = 0; i < (n); ++i)
#define all(x) (x).begin(),(x).end()
#define TIME (1.0 * clock() / CLOCKS_PER_SEC)

using namespace std;

const int mod = 1e9 + 7;

template <class X, class Y> bool maximize(X &a, Y b) {
    if(a < b) return a = b,true;
    return false;
}
template <class X, class Y> bool minimize(X &a, Y b) {
    if(a > b) return a = b,true;
    return false;
}

void file() {
    #define TASK "TASK"
    if(fopen(TASK".inp", "r")) {
        freopen(TASK".inp", "r", stdin);
        freopen(TASK".out", "w", stdout);
    }
}
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int Rand(int l, int r) {return l + rng() % (r - l + 1);}
const int MAXN = 2e5 + 5;
struct QUERY{
    int u, v;
    bool type;
}q[MAXN];
int time_in[MAXN], time_out[MAXN], N = 1, Q, XOR[MAXN], run;
vector <int> ke[MAXN];
struct Tree{
    struct node{
        node *child[2];
        set <int> s;
        node(){
            child[0] = child[1] = nullptr;
            s = set <int> ();
        }
    }*root;
    Tree(){
        root = new node();
    }
    void add(int x, int pos){
        node *tmp = root;
        Ford(i, 30, 0){
            int k = BIT(x, i);
            if(tmp -> child[k] == nullptr) tmp -> child[k] = new node();
            tmp = tmp -> child[k];
            tmp -> s.insert(pos);
        }
    }
    int MaxXor(int x, int l, int r){
        node *tmp = root;
        int res = 0;
        Ford(i, 30, 0){
            int k = BIT(x, i);
            if(tmp ->child[k ^ 1] != nullptr){
                set <int> ::iterator it = tmp ->child[1 ^ k] ->s.lower_bound(l);
                if(*it <= r && it != tmp -> child[1 ^ k] -> s.end()){
                    tmp = tmp ->child[1 ^ k];
                    res |= MASK(i);
                } else tmp = tmp -> child[k];
            } else tmp = tmp ->child[k];
        }
        return res;
    }
}trie;
void dfs(int u, int par = -1){
    time_in[u] = ++run;
    // cout << u << " " << XOR[u] << '\n';
    for (auto v : ke[u]) if(v != par){
        dfs(v, u);
    }
    time_out[u] = run;
}
void process(void) {
    cin >> Q;
    For(i, 1, Q){
        string s;
        cin >> s >> q[i].u >> q[i].v;
        if(s == "Add"){
            q[i].type = 1; ++N;
            ke[q[i].u].push_back(N);
            ke[N].push_back(q[i].u);
            XOR[N] = XOR[q[i].u] ^ q[i].v;
            q[i].u = N;
        }
        else q[i].type = 0;
    }
    dfs(1, 0);
    trie.add(XOR[1], time_in[1]);
    For(i, 1, Q){
        if(q[i].type){
            trie.add(XOR[q[i].u], time_in[q[i].u]);
        } else cout << trie.MaxXor(XOR[q[i].u], time_in[q[i].v], time_out[q[i].v]) << '\n';
    }
}
signed main() {
    file();
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    process();
    cerr << "Time elapsed: " << TIME << " s.\n";
    return (0 ^ 0);
}

Compilation message

klasika.cpp: In function 'void file()':
klasika.cpp:30:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |         freopen(TASK".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
klasika.cpp:31:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |         freopen(TASK".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 8796 KB Output is correct
2 Correct 2 ms 9052 KB Output is correct
3 Correct 2 ms 9052 KB Output is correct
4 Correct 2 ms 9308 KB Output is correct
5 Correct 2 ms 8796 KB Output is correct
6 Correct 2 ms 9348 KB Output is correct
7 Correct 2 ms 9052 KB Output is correct
8 Correct 3 ms 9308 KB Output is correct
9 Correct 3 ms 8796 KB Output is correct
10 Correct 2 ms 9052 KB Output is correct
11 Correct 2 ms 9052 KB Output is correct
12 Correct 3 ms 9308 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 8796 KB Output is correct
2 Correct 2 ms 9052 KB Output is correct
3 Correct 2 ms 9052 KB Output is correct
4 Correct 2 ms 9308 KB Output is correct
5 Correct 2 ms 8796 KB Output is correct
6 Correct 2 ms 9348 KB Output is correct
7 Correct 2 ms 9052 KB Output is correct
8 Correct 3 ms 9308 KB Output is correct
9 Correct 3 ms 8796 KB Output is correct
10 Correct 2 ms 9052 KB Output is correct
11 Correct 2 ms 9052 KB Output is correct
12 Correct 3 ms 9308 KB Output is correct
13 Correct 5 ms 10076 KB Output is correct
14 Correct 5 ms 11356 KB Output is correct
15 Correct 6 ms 12636 KB Output is correct
16 Correct 7 ms 13660 KB Output is correct
17 Correct 4 ms 10076 KB Output is correct
18 Correct 5 ms 11408 KB Output is correct
19 Correct 7 ms 12636 KB Output is correct
20 Correct 7 ms 13660 KB Output is correct
21 Correct 4 ms 10076 KB Output is correct
22 Correct 8 ms 11356 KB Output is correct
23 Correct 7 ms 12636 KB Output is correct
24 Correct 7 ms 13660 KB Output is correct

Subtask #3
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 455 ms 124184 KB Output is correct
2 Correct 766 ms 228624 KB Output is correct
3 Correct 1088 ms 328628 KB Output is correct
4 Correct 1406 ms 429312 KB Output is correct
5 Correct 494 ms 123344 KB Output is correct
6 Correct 901 ms 226584 KB Output is correct
7 Correct 1300 ms 326228 KB Output is correct
8 Correct 1767 ms 425176 KB Output is correct
9 Correct 464 ms 122468 KB Output is correct
10 Correct 812 ms 226988 KB Output is correct
11 Correct 1201 ms 327656 KB Output is correct
12 Correct 1530 ms 426412 KB Output is correct

Subtask #4
44.0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 8796 KB Output is correct
2 Correct 2 ms 9052 KB Output is correct
3 Correct 2 ms 9052 KB Output is correct
4 Correct 2 ms 9308 KB Output is correct
5 Correct 2 ms 8796 KB Output is correct
6 Correct 2 ms 9348 KB Output is correct
7 Correct 2 ms 9052 KB Output is correct
8 Correct 3 ms 9308 KB Output is correct
9 Correct 3 ms 8796 KB Output is correct
10 Correct 2 ms 9052 KB Output is correct
11 Correct 2 ms 9052 KB Output is correct
12 Correct 3 ms 9308 KB Output is correct
13 Correct 5 ms 10076 KB Output is correct
14 Correct 5 ms 11356 KB Output is correct
15 Correct 6 ms 12636 KB Output is correct
16 Correct 7 ms 13660 KB Output is correct
17 Correct 4 ms 10076 KB Output is correct
18 Correct 5 ms 11408 KB Output is correct
19 Correct 7 ms 12636 KB Output is correct
20 Correct 7 ms 13660 KB Output is correct
21 Correct 4 ms 10076 KB Output is correct
22 Correct 8 ms 11356 KB Output is correct
23 Correct 7 ms 12636 KB Output is correct
24 Correct 7 ms 13660 KB Output is correct
25 Correct 455 ms 124184 KB Output is correct
26 Correct 766 ms 228624 KB Output is correct
27 Correct 1088 ms 328628 KB Output is correct
28 Correct 1406 ms 429312 KB Output is correct
29 Correct 494 ms 123344 KB Output is correct
30 Correct 901 ms 226584 KB Output is correct
31 Correct 1300 ms 326228 KB Output is correct
32 Correct 1767 ms 425176 KB Output is correct
33 Correct 464 ms 122468 KB Output is correct
34 Correct 812 ms 226988 KB Output is correct
35 Correct 1201 ms 327656 KB Output is correct
36 Correct 1530 ms 426412 KB Output is correct
37 Correct 790 ms 125132 KB Output is correct
38 Correct 1246 ms 228736 KB Output is correct
39 Correct 1501 ms 331276 KB Output is correct
40 Correct 1737 ms 429708 KB Output is correct
41 Correct 910 ms 123680 KB Output is correct
42 Correct 1391 ms 226460 KB Output is correct
43 Correct 1750 ms 326060 KB Output is correct
44 Correct 2029 ms 424300 KB Output is correct
45 Correct 996 ms 122888 KB Output is correct
46 Correct 1450 ms 227148 KB Output is correct
47 Correct 1726 ms 326284 KB Output is correct
48 Correct 1902 ms 426572 KB Output is correct