oj.uz

Submission #769983

# Submission time Handle Problem Language Result Execution time Memory
769983 2023-06-30T15:41:55 Z vjudge1 Klasika (COCI20_klasika) C++17
33 / 110
 202 ms 48644 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];

vii graph[mx];

int ans = 0, a = 0;

vector<vector<int>> nxt;
vector<bool> marked = {false};

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

vector<vi> queries;

int solve(int x){
    int ans = 0;
    int node = 0;
    for(int j = 30;j >= 0;j--){
        if((1 << j) & x){
            if(nxt[node][0] != 0){
                node = nxt[node][0];
                ans += (1 << j);
            }
            else if(nxt[node][1] != 0){
                node = nxt[node][1];
            }
        }
        else{
            if(nxt[node][1] != 0){
                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;
    int n = 0, cnt = 0;
    nxt.resize(1, vector<int>(2));
    for(int i = 0; i < q;i++){
        string type;cin >> type;
        if(type == "Add"){
            int x, y;cin >> x >> y;x--;
            n++;
            graph[x].pb({n, y});
            pf[n] = pf[x] ^ y;
            int node = 0;
            for(int j = 30;j >= 0;j--){
                if((1 << j) & pf[n]){
                    if(nxt[node][1] == 0){
                        nxt[node][1] = ++cnt;
                        nxt.push_back({0, 0});
                        marked.push_back(0);
                    }
                    node = nxt[node][1];
                }
                else{
                    if(nxt[node][0] == 0){
                        nxt[node][0] = ++cnt;
                        nxt.push_back({0, 0});
                        marked.push_back(0);
                    }
                    node = nxt[node][0];
                }
            }
            marked[node] = 1;
        }
        else{
            int b;cin >> a >> b;a--;b--;
            //cout << a << " " << pf[a] << endl;
            if(q <= 2000){
                ans = 0, 
                dfs(b);
                cout << ans << endl;  
            }
            else cout << solve(pf[a]) << 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 5076 KB Output is correct
2 Correct 2 ms 5076 KB Output is correct
3 Correct 3 ms 5204 KB Output is correct
4 Correct 3 ms 5204 KB Output is correct
5 Correct 3 ms 5076 KB Output is correct
6 Correct 2 ms 5076 KB Output is correct
7 Correct 3 ms 5204 KB Output is correct
8 Correct 2 ms 5204 KB Output is correct
9 Correct 2 ms 5076 KB Output is correct
10 Correct 2 ms 5076 KB Output is correct
11 Correct 2 ms 5204 KB Output is correct
12 Correct 3 ms 5204 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5076 KB Output is correct
2 Correct 2 ms 5076 KB Output is correct
3 Correct 3 ms 5204 KB Output is correct
4 Correct 3 ms 5204 KB Output is correct
5 Correct 3 ms 5076 KB Output is correct
6 Correct 2 ms 5076 KB Output is correct
7 Correct 3 ms 5204 KB Output is correct
8 Correct 2 ms 5204 KB Output is correct
9 Correct 2 ms 5076 KB Output is correct
10 Correct 2 ms 5076 KB Output is correct
11 Correct 2 ms 5204 KB Output is correct
12 Correct 3 ms 5204 KB Output is correct
13 Correct 4 ms 5716 KB Output is correct
14 Correct 6 ms 6288 KB Output is correct
15 Correct 6 ms 6540 KB Output is correct
16 Correct 7 ms 7692 KB Output is correct
17 Correct 3 ms 5716 KB Output is correct
18 Correct 5 ms 6288 KB Output is correct
19 Correct 4 ms 6412 KB Output is correct
20 Correct 5 ms 6796 KB Output is correct
21 Correct 3 ms 5588 KB Output is correct
22 Correct 4 ms 6288 KB Output is correct
23 Correct 5 ms 6412 KB Output is correct
24 Correct 6 ms 6824 KB Output is correct

Subtask #3
0 / 33.0

# Verdict Execution time Memory Grader output
1 Incorrect 202 ms 48644 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5076 KB Output is correct
2 Correct 2 ms 5076 KB Output is correct
3 Correct 3 ms 5204 KB Output is correct
4 Correct 3 ms 5204 KB Output is correct
5 Correct 3 ms 5076 KB Output is correct
6 Correct 2 ms 5076 KB Output is correct
7 Correct 3 ms 5204 KB Output is correct
8 Correct 2 ms 5204 KB Output is correct
9 Correct 2 ms 5076 KB Output is correct
10 Correct 2 ms 5076 KB Output is correct
11 Correct 2 ms 5204 KB Output is correct
12 Correct 3 ms 5204 KB Output is correct
13 Correct 4 ms 5716 KB Output is correct
14 Correct 6 ms 6288 KB Output is correct
15 Correct 6 ms 6540 KB Output is correct
16 Correct 7 ms 7692 KB Output is correct
17 Correct 3 ms 5716 KB Output is correct
18 Correct 5 ms 6288 KB Output is correct
19 Correct 4 ms 6412 KB Output is correct
20 Correct 5 ms 6796 KB Output is correct
21 Correct 3 ms 5588 KB Output is correct
22 Correct 4 ms 6288 KB Output is correct
23 Correct 5 ms 6412 KB Output is correct
24 Correct 6 ms 6824 KB Output is correct
25 Incorrect 202 ms 48644 KB Output isn't correct
26 Halted 0 ms 0 KB -