oj.uz

Submission #770054

# Submission time Handle Problem Language Result Execution time Memory
770054 2023-06-30T17:46:50 Z vjudge1 Klasika (COCI20_klasika) C++17
66 / 110
 859 ms 323964 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){
                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 5152 KB Output is correct
2 Correct 3 ms 5204 KB Output is correct
3 Correct 3 ms 5332 KB Output is correct
4 Correct 3 ms 5416 KB Output is correct
5 Correct 2 ms 5076 KB Output is correct
6 Correct 3 ms 5204 KB Output is correct
7 Correct 3 ms 5412 KB Output is correct
8 Correct 3 ms 5460 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 5152 KB Output is correct
2 Correct 3 ms 5204 KB Output is correct
3 Correct 3 ms 5332 KB Output is correct
4 Correct 3 ms 5416 KB Output is correct
5 Correct 2 ms 5076 KB Output is correct
6 Correct 3 ms 5204 KB Output is correct
7 Correct 3 ms 5412 KB Output is correct
8 Correct 3 ms 5460 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 5 ms 6288 KB Output is correct
14 Correct 9 ms 7460 KB Output is correct
15 Correct 8 ms 8132 KB Output is correct
16 Correct 9 ms 9664 KB Output is correct
17 Correct 5 ms 6288 KB Output is correct
18 Correct 6 ms 7372 KB Output is correct
19 Correct 6 ms 8004 KB Output is correct
20 Correct 7 ms 8904 KB Output is correct
21 Correct 4 ms 6288 KB Output is correct
22 Correct 6 ms 7372 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 420 ms 93716 KB Output is correct
2 Correct 594 ms 170160 KB Output is correct
3 Correct 604 ms 223036 KB Output is correct
4 Correct 689 ms 323964 KB Output is correct
5 Correct 431 ms 91568 KB Output is correct
6 Correct 561 ms 165236 KB Output is correct
7 Correct 655 ms 216116 KB Output is correct
8 Correct 758 ms 313792 KB Output is correct
9 Correct 434 ms 91632 KB Output is correct
10 Correct 587 ms 166392 KB Output is correct
11 Correct 679 ms 218196 KB Output is correct
12 Correct 755 ms 315640 KB Output is correct

Subtask #4
0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5152 KB Output is correct
2 Correct 3 ms 5204 KB Output is correct
3 Correct 3 ms 5332 KB Output is correct
4 Correct 3 ms 5416 KB Output is correct
5 Correct 2 ms 5076 KB Output is correct
6 Correct 3 ms 5204 KB Output is correct
7 Correct 3 ms 5412 KB Output is correct
8 Correct 3 ms 5460 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 5 ms 6288 KB Output is correct
14 Correct 9 ms 7460 KB Output is correct
15 Correct 8 ms 8132 KB Output is correct
16 Correct 9 ms 9664 KB Output is correct
17 Correct 5 ms 6288 KB Output is correct
18 Correct 6 ms 7372 KB Output is correct
19 Correct 6 ms 8004 KB Output is correct
20 Correct 7 ms 8904 KB Output is correct
21 Correct 4 ms 6288 KB Output is correct
22 Correct 6 ms 7372 KB Output is correct
23 Correct 7 ms 8004 KB Output is correct
24 Correct 7 ms 8772 KB Output is correct
25 Correct 420 ms 93716 KB Output is correct
26 Correct 594 ms 170160 KB Output is correct
27 Correct 604 ms 223036 KB Output is correct
28 Correct 689 ms 323964 KB Output is correct
29 Correct 431 ms 91568 KB Output is correct
30 Correct 561 ms 165236 KB Output is correct
31 Correct 655 ms 216116 KB Output is correct
32 Correct 758 ms 313792 KB Output is correct
33 Correct 434 ms 91632 KB Output is correct
34 Correct 587 ms 166392 KB Output is correct
35 Correct 679 ms 218196 KB Output is correct
36 Correct 755 ms 315640 KB Output is correct
37 Correct 634 ms 94436 KB Output is correct
38 Correct 739 ms 170404 KB Output is correct
39 Correct 857 ms 224676 KB Output is correct
40 Correct 859 ms 323952 KB Output is correct
41 Incorrect 402 ms 90400 KB Output isn't correct
42 Halted 0 ms 0 KB -