oj.uz

Submission #770155

# Submission time Handle Problem Language Result Execution time Memory
770155 2023-06-30T20:50:23 Z YassineBenYounes Klasika (COCI20_klasika) C++17
33 / 110
 2003 ms 524288 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;

int n;

set<int> after[mx*10];

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){
    auto ind1 = after[node].lower_bound(l);
    if(ind1 == after[node].end()){
        return 0;
    }
    return ((*ind1) <= r);
}

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){
                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){
                node = nxt[node][0];
            }
        }
    }
    return ans;
}

void run_case(){
    int q;cin >> q;
    // Initialize
    n = 0;
    int cnt = 0;
    nxt.resize(1, vector<int>(2));
    int node = 0;
    after[node].insert(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});
            }
            node = nxt[node][1];
        }
        else{
            if(nxt[node][0] == 0){
                nxt[node][0] = ++cnt;
                nxt.push_back({0, 0});
            }
            node = nxt[node][0];
        }
        after[node].insert(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].insert(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});
                    }
                    node = nxt[node][1];
                }
                else{
                    if(nxt[node][0] == 0){
                        nxt[node][0] = ++cnt;
                        nxt.push_back({0, 0});
                    }
                    node = nxt[node][0];
                }
                after[node].insert(low[cur]);
            }
        }
        else{
            a = queries[i][1];
            int b = queries[i][2];
            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 45 ms 99020 KB Output is correct
2 Correct 47 ms 99196 KB Output is correct
3 Correct 45 ms 99256 KB Output is correct
4 Correct 43 ms 99368 KB Output is correct
5 Correct 45 ms 98996 KB Output is correct
6 Correct 45 ms 99188 KB Output is correct
7 Correct 45 ms 99184 KB Output is correct
8 Correct 45 ms 99396 KB Output is correct
9 Correct 44 ms 99120 KB Output is correct
10 Correct 44 ms 99148 KB Output is correct
11 Correct 45 ms 99276 KB Output is correct
12 Correct 46 ms 99304 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 45 ms 99020 KB Output is correct
2 Correct 47 ms 99196 KB Output is correct
3 Correct 45 ms 99256 KB Output is correct
4 Correct 43 ms 99368 KB Output is correct
5 Correct 45 ms 98996 KB Output is correct
6 Correct 45 ms 99188 KB Output is correct
7 Correct 45 ms 99184 KB Output is correct
8 Correct 45 ms 99396 KB Output is correct
9 Correct 44 ms 99120 KB Output is correct
10 Correct 44 ms 99148 KB Output is correct
11 Correct 45 ms 99276 KB Output is correct
12 Correct 46 ms 99304 KB Output is correct
13 Correct 48 ms 100276 KB Output is correct
14 Correct 50 ms 101592 KB Output is correct
15 Correct 52 ms 102392 KB Output is correct
16 Correct 53 ms 104192 KB Output is correct
17 Correct 48 ms 100280 KB Output is correct
18 Correct 56 ms 101588 KB Output is correct
19 Correct 59 ms 102264 KB Output is correct
20 Correct 53 ms 103228 KB Output is correct
21 Correct 49 ms 100200 KB Output is correct
22 Correct 52 ms 101452 KB Output is correct
23 Correct 53 ms 102236 KB Output is correct
24 Correct 54 ms 103288 KB Output is correct

Subtask #3
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 695 ms 209540 KB Output is correct
2 Correct 1367 ms 305396 KB Output is correct
3 Correct 1690 ms 394244 KB Output is correct
4 Runtime error 2003 ms 524288 KB Execution killed with signal 11
5 Halted 0 ms 0 KB -

Subtask #4
0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 45 ms 99020 KB Output is correct
2 Correct 47 ms 99196 KB Output is correct
3 Correct 45 ms 99256 KB Output is correct
4 Correct 43 ms 99368 KB Output is correct
5 Correct 45 ms 98996 KB Output is correct
6 Correct 45 ms 99188 KB Output is correct
7 Correct 45 ms 99184 KB Output is correct
8 Correct 45 ms 99396 KB Output is correct
9 Correct 44 ms 99120 KB Output is correct
10 Correct 44 ms 99148 KB Output is correct
11 Correct 45 ms 99276 KB Output is correct
12 Correct 46 ms 99304 KB Output is correct
13 Correct 48 ms 100276 KB Output is correct
14 Correct 50 ms 101592 KB Output is correct
15 Correct 52 ms 102392 KB Output is correct
16 Correct 53 ms 104192 KB Output is correct
17 Correct 48 ms 100280 KB Output is correct
18 Correct 56 ms 101588 KB Output is correct
19 Correct 59 ms 102264 KB Output is correct
20 Correct 53 ms 103228 KB Output is correct
21 Correct 49 ms 100200 KB Output is correct
22 Correct 52 ms 101452 KB Output is correct
23 Correct 53 ms 102236 KB Output is correct
24 Correct 54 ms 103288 KB Output is correct
25 Correct 695 ms 209540 KB Output is correct
26 Correct 1367 ms 305396 KB Output is correct
27 Correct 1690 ms 394244 KB Output is correct
28 Runtime error 2003 ms 524288 KB Execution killed with signal 11
29 Halted 0 ms 0 KB -