oj.uz

Submission #770045

# Submission time Handle Problem Language Result Execution time Memory
770045 2023-06-30T17:33:56 Z vjudge1 Klasika (COCI20_klasika) C++17
66 / 110
 755 ms 324292 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 <= 5000){
                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 5204 KB Output is correct
3 Correct 2 ms 5332 KB Output is correct
4 Correct 3 ms 5460 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 5332 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 5332 KB Output is correct
11 Correct 3 ms 5332 KB Output is correct
12 Correct 4 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 5204 KB Output is correct
3 Correct 2 ms 5332 KB Output is correct
4 Correct 3 ms 5460 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 5332 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 5332 KB Output is correct
11 Correct 3 ms 5332 KB Output is correct
12 Correct 4 ms 5460 KB Output is correct
13 Correct 6 ms 6288 KB Output is correct
14 Correct 7 ms 7500 KB Output is correct
15 Correct 8 ms 8096 KB Output is correct
16 Correct 9 ms 9776 KB Output is correct
17 Correct 4 ms 6288 KB Output is correct
18 Correct 5 ms 7460 KB Output is correct
19 Correct 6 ms 7968 KB Output is correct
20 Correct 7 ms 8888 KB Output is correct
21 Correct 5 ms 6328 KB Output is correct
22 Correct 6 ms 7372 KB Output is correct
23 Correct 6 ms 8004 KB Output is correct
24 Correct 8 ms 8864 KB Output is correct

Subtask #3
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 402 ms 93368 KB Output is correct
2 Correct 518 ms 169752 KB Output is correct
3 Correct 575 ms 222460 KB Output is correct
4 Correct 667 ms 323232 KB Output is correct
5 Correct 446 ms 91068 KB Output is correct
6 Correct 572 ms 164716 KB Output is correct
7 Correct 624 ms 215524 KB Output is correct
8 Correct 737 ms 313204 KB Output is correct
9 Correct 420 ms 91068 KB Output is correct
10 Correct 582 ms 165820 KB Output is correct
11 Correct 605 ms 217776 KB Output is correct
12 Correct 701 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 5204 KB Output is correct
3 Correct 2 ms 5332 KB Output is correct
4 Correct 3 ms 5460 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 5332 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 5332 KB Output is correct
11 Correct 3 ms 5332 KB Output is correct
12 Correct 4 ms 5460 KB Output is correct
13 Correct 6 ms 6288 KB Output is correct
14 Correct 7 ms 7500 KB Output is correct
15 Correct 8 ms 8096 KB Output is correct
16 Correct 9 ms 9776 KB Output is correct
17 Correct 4 ms 6288 KB Output is correct
18 Correct 5 ms 7460 KB Output is correct
19 Correct 6 ms 7968 KB Output is correct
20 Correct 7 ms 8888 KB Output is correct
21 Correct 5 ms 6328 KB Output is correct
22 Correct 6 ms 7372 KB Output is correct
23 Correct 6 ms 8004 KB Output is correct
24 Correct 8 ms 8864 KB Output is correct
25 Correct 402 ms 93368 KB Output is correct
26 Correct 518 ms 169752 KB Output is correct
27 Correct 575 ms 222460 KB Output is correct
28 Correct 667 ms 323232 KB Output is correct
29 Correct 446 ms 91068 KB Output is correct
30 Correct 572 ms 164716 KB Output is correct
31 Correct 624 ms 215524 KB Output is correct
32 Correct 737 ms 313204 KB Output is correct
33 Correct 420 ms 91068 KB Output is correct
34 Correct 582 ms 165820 KB Output is correct
35 Correct 605 ms 217776 KB Output is correct
36 Correct 701 ms 315128 KB Output is correct
37 Correct 568 ms 94064 KB Output is correct
38 Correct 716 ms 170848 KB Output is correct
39 Correct 713 ms 225208 KB Output is correct
40 Correct 755 ms 324292 KB Output is correct
41 Incorrect 398 ms 90796 KB Output isn't correct
42 Halted 0 ms 0 KB -