oj.uz

Submission #770042

# Submission time Handle Problem Language Result Execution time Memory
770042 2023-06-30T17:32:03 Z vjudge1 Klasika (COCI20_klasika) C++17
66 / 110
 871 ms 327060 KB 
#include<bits/stdc++.h>
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef double db;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define pbds tree<pair<ll, ll>, null_type, less<pair<ll,ll>>,rb_tree_tag, tree_order_statistics_node_update>
using namespace __gnu_pbds;
ll gcd(ll a , ll b) {return b ? gcd(b , a % b) : a ;} // greatest common divisor (PGCD)
ll lcm(ll a , ll b) {return (a * b) / gcd(a , b);} // least common multiple (PPCM)
int dx[8] = {1, 0, 0, -1, 1, 1, -1, -1};
int dy[8] = {0, 1, -1, 0, 1, -1, -1, 1};
#define endl "\n"
#define ss second
#define ff first
#define all(x) (x).begin() , (x).end()
#define pb push_back
#define vi vector<int>
#define vii vector<pair<int,int>>
#define vl vector<ll>
#define vll vector<pair<ll,ll>>
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pdd  pair<double,double>
#define vdd  vector<pdd>
#define speed ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
using namespace std;
////////////////////Only Clear Code//////////////////////////

void usaco_problem(){
    freopen("milkvisits.in", "r", stdin);
    freopen("milkvisits.out", "w", stdout);
}

void init(){
    #ifndef ONLINE_JUDGE
 
freopen("input.txt", "r", stdin);
 
freopen("output.txt", "w", stdout);
 
#endif // ONLINE_JUDGE
}

const int mx = 2e5+5;
const int LOG = 25;
const int inf = 1e9;
const ll mod = 1e8;

int pf[mx];

vi graph[mx];

vector<vector<int>> nxt;

vector<vi> after = {vi()};

vector<vi> queries;

int low[mx], high[mx];

int c = 0, ans = 0, a = 0;

void dfs(int node){
    ans = max(ans, pf[a] ^ pf[node]);
    for(int adj : graph[node]){
        dfs(adj);
    }
}


void dfs1(int node){
    high[node] = 1;
    low[node] = c++;
    for(int adj : graph[node]){
        dfs1(adj);
        high[node] += high[adj];
    }
}

bool verif(int node, int l, int r){
    int ind1 = lower_bound(all(after[node]), l) - after[node].begin();
    int ind2 = upper_bound(all(after[node]), r) - after[node].begin();
    if(ind2 == 0){
        return 0;
    }
    ind2--;
    if(ind1 <= ind2){
        return 1;
    }
    return 0;
}

int solve(int x, int l, int r){
    int ans = 0;
    int node = 0;
    for(int j = 30;j >= 0;j--){
        if((1 << j) & x){
            if(nxt[node][0] != 0 && verif(nxt[node][0], l, r)){
                node = nxt[node][0];
                ans += (1 << j);
            }
            else if(nxt[node][1] != 0 && verif(nxt[node][1], l, r)){
                node = nxt[node][1];
            }
        }
        else{
            if(nxt[node][1] != 0 && verif(nxt[node][1], l, r)){
                node = nxt[node][1];
                ans += (1 << j);
            }
            else if(nxt[node][0] != 0 && verif(nxt[node][0], l, r)){
                node = nxt[node][0];
            }
        }
    }
    return ans;
}

void run_case(){
    int q;cin >> q;
    // Initialize
    int n = 0, cnt = 0;
    nxt.resize(1, vector<int>(2));
    int node = 0;
    after[node].pb(0);
    for(int j = 30;j >= 0;j--){
        if((1 << j) & 0){
            if(nxt[node][1] == 0){
                nxt[node][1] = ++cnt;
                nxt.push_back({0, 0});
                after.push_back(vi());
            }
            node = nxt[node][1];
        }
        else{
            if(nxt[node][0] == 0){
                nxt[node][0] = ++cnt;
                nxt.push_back({0, 0});
                after.push_back(vi());
            }
            node = nxt[node][0];
        }
        after[node].pb(0);
    }
    // construct tree
    for(int i = 0; i < q;i++){
        string type;cin >> type;
        if(type == "Add"){
            int x, y;cin >> x >> y;x--;
            n++;
            queries.pb({0, x , n, y});
            graph[x].pb(n);
            pf[n] = pf[x] ^ y;
        }
        else{
            int a, b;cin >> a >> b;a--;b--;
            queries.pb({1, a, b});
        }
    }
    // construct euler tour
    n++;
    dfs1(0);
    for(int i = 0; i < n;i++){
        high[i] += low[i]-1;
        graph[i].clear();
    }
    //construct modified trie + answer queries
    for(int i = 0; i < q;i++){
        int type = queries[i][0];
        if(type==0){
            int x = queries[i][1], cur = queries[i][2];
            int node = 0;
            graph[x].pb(cur);
            after[node].pb(low[cur]);
            for(int j = 30;j >= 0;j--){
                if((1 << j) & pf[cur]){
                    if(nxt[node][1] == 0){
                        nxt[node][1] = ++cnt;
                        nxt.push_back({0, 0});
                        after.push_back(vi());
                    }
                    node = nxt[node][1];
                }
                else{
                    if(nxt[node][0] == 0){
                        nxt[node][0] = ++cnt;
                        nxt.push_back({0, 0});
                        after.push_back(vi());
                    }
                    node = nxt[node][0];
                }
                after[node].pb(low[cur]);
            }
        }
        else{
            a = queries[i][1];
            int b = queries[i][2];
            if(q <= 2000){
                ans = 0;
                dfs(b);
                cout << ans << endl;
            }
            else cout << solve(pf[a], low[b], high[b]) << endl;
        }
    }
}

int main(){
    speed;
    int t;
    //cin >> t;
    t = 1;
    while(t--){
        run_case();
    }
}

/*
    NEVER GIVE UP!
    DOING SMTHNG IS BETTER THAN DOING NTHNG!!!
    Your Guide when stuck:
    - Continue keyword only after reading the whole input
    - Don't use memset with testcases
    - Check for corner cases(n=1, n=0)
    - Check where you declare n(Be careful of declaring it globally and in main)
*/

Compilation message

klasika.cpp: In function 'void usaco_problem()':
klasika.cpp:32:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |     freopen("milkvisits.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
klasika.cpp:33:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |     freopen("milkvisits.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
klasika.cpp: In function 'void init()':
klasika.cpp:39:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 | freopen("input.txt", "r", stdin);
      | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
klasika.cpp:41:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 | freopen("output.txt", "w", stdout);
      | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5204 KB Output is correct
2 Correct 3 ms 5316 KB Output is correct
3 Correct 3 ms 5332 KB Output is correct
4 Correct 3 ms 5460 KB Output is correct
5 Correct 4 ms 5076 KB Output is correct
6 Correct 3 ms 5204 KB Output is correct
7 Correct 3 ms 5332 KB Output is correct
8 Correct 4 ms 5460 KB Output is correct
9 Correct 3 ms 5204 KB Output is correct
10 Correct 3 ms 5332 KB Output is correct
11 Correct 3 ms 5332 KB Output is correct
12 Correct 3 ms 5460 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5204 KB Output is correct
2 Correct 3 ms 5316 KB Output is correct
3 Correct 3 ms 5332 KB Output is correct
4 Correct 3 ms 5460 KB Output is correct
5 Correct 4 ms 5076 KB Output is correct
6 Correct 3 ms 5204 KB Output is correct
7 Correct 3 ms 5332 KB Output is correct
8 Correct 4 ms 5460 KB Output is correct
9 Correct 3 ms 5204 KB Output is correct
10 Correct 3 ms 5332 KB Output is correct
11 Correct 3 ms 5332 KB Output is correct
12 Correct 3 ms 5460 KB Output is correct
13 Correct 5 ms 6288 KB Output is correct
14 Correct 7 ms 7400 KB Output is correct
15 Correct 7 ms 8132 KB Output is correct
16 Correct 8 ms 9668 KB Output is correct
17 Correct 4 ms 6308 KB Output is correct
18 Correct 5 ms 7372 KB Output is correct
19 Correct 6 ms 8004 KB Output is correct
20 Correct 7 ms 8772 KB Output is correct
21 Correct 4 ms 6264 KB Output is correct
22 Correct 5 ms 7392 KB Output is correct
23 Correct 7 ms 8004 KB Output is correct
24 Correct 7 ms 8772 KB Output is correct

Subtask #3
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 402 ms 93352 KB Output is correct
2 Correct 534 ms 169680 KB Output is correct
3 Correct 599 ms 222352 KB Output is correct
4 Correct 684 ms 323272 KB Output is correct
5 Correct 440 ms 90988 KB Output is correct
6 Correct 581 ms 164864 KB Output is correct
7 Correct 682 ms 215612 KB Output is correct
8 Correct 787 ms 313248 KB Output is correct
9 Correct 448 ms 91112 KB Output is correct
10 Correct 598 ms 165872 KB Output is correct
11 Correct 697 ms 217656 KB Output is correct
12 Correct 788 ms 315128 KB Output is correct

Subtask #4
0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5204 KB Output is correct
2 Correct 3 ms 5316 KB Output is correct
3 Correct 3 ms 5332 KB Output is correct
4 Correct 3 ms 5460 KB Output is correct
5 Correct 4 ms 5076 KB Output is correct
6 Correct 3 ms 5204 KB Output is correct
7 Correct 3 ms 5332 KB Output is correct
8 Correct 4 ms 5460 KB Output is correct
9 Correct 3 ms 5204 KB Output is correct
10 Correct 3 ms 5332 KB Output is correct
11 Correct 3 ms 5332 KB Output is correct
12 Correct 3 ms 5460 KB Output is correct
13 Correct 5 ms 6288 KB Output is correct
14 Correct 7 ms 7400 KB Output is correct
15 Correct 7 ms 8132 KB Output is correct
16 Correct 8 ms 9668 KB Output is correct
17 Correct 4 ms 6308 KB Output is correct
18 Correct 5 ms 7372 KB Output is correct
19 Correct 6 ms 8004 KB Output is correct
20 Correct 7 ms 8772 KB Output is correct
21 Correct 4 ms 6264 KB Output is correct
22 Correct 5 ms 7392 KB Output is correct
23 Correct 7 ms 8004 KB Output is correct
24 Correct 7 ms 8772 KB Output is correct
25 Correct 402 ms 93352 KB Output is correct
26 Correct 534 ms 169680 KB Output is correct
27 Correct 599 ms 222352 KB Output is correct
28 Correct 684 ms 323272 KB Output is correct
29 Correct 440 ms 90988 KB Output is correct
30 Correct 581 ms 164864 KB Output is correct
31 Correct 682 ms 215612 KB Output is correct
32 Correct 787 ms 313248 KB Output is correct
33 Correct 448 ms 91112 KB Output is correct
34 Correct 598 ms 165872 KB Output is correct
35 Correct 697 ms 217656 KB Output is correct
36 Correct 788 ms 315128 KB Output is correct
37 Correct 645 ms 93652 KB Output is correct
38 Correct 720 ms 173228 KB Output is correct
39 Correct 761 ms 227600 KB Output is correct
40 Correct 871 ms 327060 KB Output is correct
41 Incorrect 404 ms 92968 KB Output isn't correct
42 Halted 0 ms 0 KB -