oj.uz

Submission #770153

# Submission time Handle Problem Language Result Execution time Memory
770153 2023-06-30T20:49:32 Z YassineBenYounes Klasika (COCI20_klasika) C++17
33 / 110
 1784 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*20];

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 84 ms 193044 KB Output is correct
2 Correct 86 ms 193088 KB Output is correct
3 Correct 85 ms 193192 KB Output is correct
4 Correct 85 ms 193340 KB Output is correct
5 Correct 85 ms 192908 KB Output is correct
6 Correct 84 ms 193064 KB Output is correct
7 Correct 86 ms 193100 KB Output is correct
8 Correct 87 ms 193300 KB Output is correct
9 Correct 85 ms 192968 KB Output is correct
10 Correct 83 ms 193108 KB Output is correct
11 Correct 88 ms 193144 KB Output is correct
12 Correct 91 ms 193228 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 84 ms 193044 KB Output is correct
2 Correct 86 ms 193088 KB Output is correct
3 Correct 85 ms 193192 KB Output is correct
4 Correct 85 ms 193340 KB Output is correct
5 Correct 85 ms 192908 KB Output is correct
6 Correct 84 ms 193064 KB Output is correct
7 Correct 86 ms 193100 KB Output is correct
8 Correct 87 ms 193300 KB Output is correct
9 Correct 85 ms 192968 KB Output is correct
10 Correct 83 ms 193108 KB Output is correct
11 Correct 88 ms 193144 KB Output is correct
12 Correct 91 ms 193228 KB Output is correct
13 Correct 94 ms 194192 KB Output is correct
14 Correct 88 ms 195412 KB Output is correct
15 Correct 90 ms 196372 KB Output is correct
16 Correct 92 ms 198080 KB Output is correct
17 Correct 88 ms 194224 KB Output is correct
18 Correct 90 ms 195440 KB Output is correct
19 Correct 94 ms 196260 KB Output is correct
20 Correct 106 ms 197164 KB Output is correct
21 Correct 88 ms 194200 KB Output is correct
22 Correct 92 ms 195376 KB Output is correct
23 Correct 92 ms 196188 KB Output is correct
24 Correct 97 ms 197224 KB Output is correct

Subtask #3
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 715 ms 303412 KB Output is correct
2 Correct 1280 ms 399168 KB Output is correct
3 Correct 1784 ms 488204 KB Output is correct
4 Runtime error 1534 ms 524288 KB Execution killed with signal 9
5 Halted 0 ms 0 KB -

Subtask #4
0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 84 ms 193044 KB Output is correct
2 Correct 86 ms 193088 KB Output is correct
3 Correct 85 ms 193192 KB Output is correct
4 Correct 85 ms 193340 KB Output is correct
5 Correct 85 ms 192908 KB Output is correct
6 Correct 84 ms 193064 KB Output is correct
7 Correct 86 ms 193100 KB Output is correct
8 Correct 87 ms 193300 KB Output is correct
9 Correct 85 ms 192968 KB Output is correct
10 Correct 83 ms 193108 KB Output is correct
11 Correct 88 ms 193144 KB Output is correct
12 Correct 91 ms 193228 KB Output is correct
13 Correct 94 ms 194192 KB Output is correct
14 Correct 88 ms 195412 KB Output is correct
15 Correct 90 ms 196372 KB Output is correct
16 Correct 92 ms 198080 KB Output is correct
17 Correct 88 ms 194224 KB Output is correct
18 Correct 90 ms 195440 KB Output is correct
19 Correct 94 ms 196260 KB Output is correct
20 Correct 106 ms 197164 KB Output is correct
21 Correct 88 ms 194200 KB Output is correct
22 Correct 92 ms 195376 KB Output is correct
23 Correct 92 ms 196188 KB Output is correct
24 Correct 97 ms 197224 KB Output is correct
25 Correct 715 ms 303412 KB Output is correct
26 Correct 1280 ms 399168 KB Output is correct
27 Correct 1784 ms 488204 KB Output is correct
28 Runtime error 1534 ms 524288 KB Execution killed with signal 9
29 Halted 0 ms 0 KB -