oj.uz

Submission #770060

# Submission time Handle Problem Language Result Execution time Memory
770060 2023-06-30T17:52:48 Z vjudge1 Klasika (COCI20_klasika) C++17
66 / 110
 793 ms 323300 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];
            //cout << pf[a] << " " << low[b] << " " << high[b] << endl;
            if(q <= 2000 && b <= 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 2 ms 5252 KB Output is correct
3 Correct 4 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 5156 KB Output is correct
7 Correct 3 ms 5356 KB Output is correct
8 Correct 3 ms 5408 KB Output is correct
9 Correct 3 ms 5204 KB Output is correct
10 Correct 3 ms 5288 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 2 ms 5252 KB Output is correct
3 Correct 4 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 5156 KB Output is correct
7 Correct 3 ms 5356 KB Output is correct
8 Correct 3 ms 5408 KB Output is correct
9 Correct 3 ms 5204 KB Output is correct
10 Correct 3 ms 5288 KB Output is correct
11 Correct 3 ms 5332 KB Output is correct
12 Correct 3 ms 5460 KB Output is correct
13 Correct 7 ms 6356 KB Output is correct
14 Correct 7 ms 7500 KB Output is correct
15 Correct 10 ms 8088 KB Output is correct
16 Correct 10 ms 9668 KB Output is correct
17 Correct 4 ms 6316 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 8900 KB Output is correct
21 Correct 5 ms 6288 KB Output is correct
22 Correct 6 ms 7372 KB Output is correct
23 Correct 7 ms 7968 KB Output is correct
24 Correct 8 ms 8796 KB Output is correct

Subtask #3
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 413 ms 93316 KB Output is correct
2 Correct 538 ms 169752 KB Output is correct
3 Correct 603 ms 222452 KB Output is correct
4 Correct 723 ms 323300 KB Output is correct
5 Correct 428 ms 91036 KB Output is correct
6 Correct 570 ms 164764 KB Output is correct
7 Correct 651 ms 215528 KB Output is correct
8 Correct 748 ms 313264 KB Output is correct
9 Correct 447 ms 91152 KB Output is correct
10 Correct 541 ms 165816 KB Output is correct
11 Correct 626 ms 217628 KB Output is correct
12 Correct 745 ms 315152 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 2 ms 5252 KB Output is correct
3 Correct 4 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 5156 KB Output is correct
7 Correct 3 ms 5356 KB Output is correct
8 Correct 3 ms 5408 KB Output is correct
9 Correct 3 ms 5204 KB Output is correct
10 Correct 3 ms 5288 KB Output is correct
11 Correct 3 ms 5332 KB Output is correct
12 Correct 3 ms 5460 KB Output is correct
13 Correct 7 ms 6356 KB Output is correct
14 Correct 7 ms 7500 KB Output is correct
15 Correct 10 ms 8088 KB Output is correct
16 Correct 10 ms 9668 KB Output is correct
17 Correct 4 ms 6316 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 8900 KB Output is correct
21 Correct 5 ms 6288 KB Output is correct
22 Correct 6 ms 7372 KB Output is correct
23 Correct 7 ms 7968 KB Output is correct
24 Correct 8 ms 8796 KB Output is correct
25 Correct 413 ms 93316 KB Output is correct
26 Correct 538 ms 169752 KB Output is correct
27 Correct 603 ms 222452 KB Output is correct
28 Correct 723 ms 323300 KB Output is correct
29 Correct 428 ms 91036 KB Output is correct
30 Correct 570 ms 164764 KB Output is correct
31 Correct 651 ms 215528 KB Output is correct
32 Correct 748 ms 313264 KB Output is correct
33 Correct 447 ms 91152 KB Output is correct
34 Correct 541 ms 165816 KB Output is correct
35 Correct 626 ms 217628 KB Output is correct
36 Correct 745 ms 315152 KB Output is correct
37 Correct 583 ms 93668 KB Output is correct
38 Correct 689 ms 169704 KB Output is correct
39 Correct 764 ms 223912 KB Output is correct
40 Correct 793 ms 323176 KB Output is correct
41 Incorrect 434 ms 89684 KB Output isn't correct
42 Halted 0 ms 0 KB -