oj.uz

Submission #770151

# Submission time Handle Problem Language Result Execution time Memory
770151 2023-06-30T20:40:05 Z YassineBenYounes Klasika (COCI20_klasika) C++17
33 / 110
 1943 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;
vector<set<int>> after = {set<int>()};

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});
                after.push_back(set<int>());
            }
            node = nxt[node][1];
        }
        else{
            if(nxt[node][0] == 0){
                nxt[node][0] = ++cnt;
                nxt.push_back({0, 0});
                after.push_back(set<int>());
            }
            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});
                        after.push_back(set<int>());
                    }
                    node = nxt[node][1];
                }
                else{
                    if(nxt[node][0] == 0){
                        nxt[node][0] = ++cnt;
                        nxt.push_back({0, 0});
                        after.push_back(set<int>());
                    }
                    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 3 ms 5204 KB Output is correct
2 Correct 3 ms 5332 KB Output is correct
3 Correct 3 ms 5632 KB Output is correct
4 Correct 3 ms 5588 KB Output is correct
5 Correct 2 ms 5204 KB Output is correct
6 Correct 3 ms 5332 KB Output is correct
7 Correct 4 ms 5588 KB Output is correct
8 Correct 4 ms 5588 KB Output is correct
9 Correct 3 ms 5204 KB Output is correct
10 Correct 3 ms 5460 KB Output is correct
11 Correct 4 ms 5588 KB Output is correct
12 Correct 3 ms 5588 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 5332 KB Output is correct
3 Correct 3 ms 5632 KB Output is correct
4 Correct 3 ms 5588 KB Output is correct
5 Correct 2 ms 5204 KB Output is correct
6 Correct 3 ms 5332 KB Output is correct
7 Correct 4 ms 5588 KB Output is correct
8 Correct 4 ms 5588 KB Output is correct
9 Correct 3 ms 5204 KB Output is correct
10 Correct 3 ms 5460 KB Output is correct
11 Correct 4 ms 5588 KB Output is correct
12 Correct 3 ms 5588 KB Output is correct
13 Correct 8 ms 6860 KB Output is correct
14 Correct 8 ms 8772 KB Output is correct
15 Correct 10 ms 9664 KB Output is correct
16 Correct 12 ms 12476 KB Output is correct
17 Correct 6 ms 6852 KB Output is correct
18 Correct 10 ms 8772 KB Output is correct
19 Correct 10 ms 9588 KB Output is correct
20 Correct 11 ms 10816 KB Output is correct
21 Correct 6 ms 6860 KB Output is correct
22 Correct 8 ms 8772 KB Output is correct
23 Correct 11 ms 9536 KB Output is correct
24 Correct 12 ms 10908 KB Output is correct

Subtask #3
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 734 ms 147908 KB Output is correct
2 Correct 1290 ms 285132 KB Output is correct
3 Correct 1943 ms 380348 KB Output is correct
4 Runtime error 1850 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 3 ms 5204 KB Output is correct
2 Correct 3 ms 5332 KB Output is correct
3 Correct 3 ms 5632 KB Output is correct
4 Correct 3 ms 5588 KB Output is correct
5 Correct 2 ms 5204 KB Output is correct
6 Correct 3 ms 5332 KB Output is correct
7 Correct 4 ms 5588 KB Output is correct
8 Correct 4 ms 5588 KB Output is correct
9 Correct 3 ms 5204 KB Output is correct
10 Correct 3 ms 5460 KB Output is correct
11 Correct 4 ms 5588 KB Output is correct
12 Correct 3 ms 5588 KB Output is correct
13 Correct 8 ms 6860 KB Output is correct
14 Correct 8 ms 8772 KB Output is correct
15 Correct 10 ms 9664 KB Output is correct
16 Correct 12 ms 12476 KB Output is correct
17 Correct 6 ms 6852 KB Output is correct
18 Correct 10 ms 8772 KB Output is correct
19 Correct 10 ms 9588 KB Output is correct
20 Correct 11 ms 10816 KB Output is correct
21 Correct 6 ms 6860 KB Output is correct
22 Correct 8 ms 8772 KB Output is correct
23 Correct 11 ms 9536 KB Output is correct
24 Correct 12 ms 10908 KB Output is correct
25 Correct 734 ms 147908 KB Output is correct
26 Correct 1290 ms 285132 KB Output is correct
27 Correct 1943 ms 380348 KB Output is correct
28 Runtime error 1850 ms 524288 KB Execution killed with signal 9
29 Halted 0 ms 0 KB -