oj.uz

Submission #770152

# Submission time Handle Problem Language Result Execution time Memory
770152 2023-06-30T20:47:30 Z YassineBenYounes Klasika (COCI20_klasika) C++17
33 / 110
 1342 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*30];

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 141 ms 286928 KB Output is correct
2 Correct 119 ms 286980 KB Output is correct
3 Correct 142 ms 287192 KB Output is correct
4 Correct 120 ms 287184 KB Output is correct
5 Correct 121 ms 286928 KB Output is correct
6 Correct 118 ms 287000 KB Output is correct
7 Correct 118 ms 287156 KB Output is correct
8 Correct 124 ms 287224 KB Output is correct
9 Correct 119 ms 286900 KB Output is correct
10 Correct 120 ms 287084 KB Output is correct
11 Correct 139 ms 287180 KB Output is correct
12 Correct 120 ms 287204 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 141 ms 286928 KB Output is correct
2 Correct 119 ms 286980 KB Output is correct
3 Correct 142 ms 287192 KB Output is correct
4 Correct 120 ms 287184 KB Output is correct
5 Correct 121 ms 286928 KB Output is correct
6 Correct 118 ms 287000 KB Output is correct
7 Correct 118 ms 287156 KB Output is correct
8 Correct 124 ms 287224 KB Output is correct
9 Correct 119 ms 286900 KB Output is correct
10 Correct 120 ms 287084 KB Output is correct
11 Correct 139 ms 287180 KB Output is correct
12 Correct 120 ms 287204 KB Output is correct
13 Correct 125 ms 288124 KB Output is correct
14 Correct 125 ms 289344 KB Output is correct
15 Correct 136 ms 290228 KB Output is correct
16 Correct 127 ms 291972 KB Output is correct
17 Correct 126 ms 288064 KB Output is correct
18 Correct 126 ms 289312 KB Output is correct
19 Correct 129 ms 290104 KB Output is correct
20 Correct 136 ms 291072 KB Output is correct
21 Correct 148 ms 288128 KB Output is correct
22 Correct 125 ms 289408 KB Output is correct
23 Correct 128 ms 290084 KB Output is correct
24 Correct 129 ms 291164 KB Output is correct

Subtask #3
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 799 ms 397436 KB Output is correct
2 Correct 1342 ms 493072 KB Output is correct
3 Runtime error 1155 ms 524288 KB Execution killed with signal 9
4 Halted 0 ms 0 KB -

Subtask #4
0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 141 ms 286928 KB Output is correct
2 Correct 119 ms 286980 KB Output is correct
3 Correct 142 ms 287192 KB Output is correct
4 Correct 120 ms 287184 KB Output is correct
5 Correct 121 ms 286928 KB Output is correct
6 Correct 118 ms 287000 KB Output is correct
7 Correct 118 ms 287156 KB Output is correct
8 Correct 124 ms 287224 KB Output is correct
9 Correct 119 ms 286900 KB Output is correct
10 Correct 120 ms 287084 KB Output is correct
11 Correct 139 ms 287180 KB Output is correct
12 Correct 120 ms 287204 KB Output is correct
13 Correct 125 ms 288124 KB Output is correct
14 Correct 125 ms 289344 KB Output is correct
15 Correct 136 ms 290228 KB Output is correct
16 Correct 127 ms 291972 KB Output is correct
17 Correct 126 ms 288064 KB Output is correct
18 Correct 126 ms 289312 KB Output is correct
19 Correct 129 ms 290104 KB Output is correct
20 Correct 136 ms 291072 KB Output is correct
21 Correct 148 ms 288128 KB Output is correct
22 Correct 125 ms 289408 KB Output is correct
23 Correct 128 ms 290084 KB Output is correct
24 Correct 129 ms 291164 KB Output is correct
25 Correct 799 ms 397436 KB Output is correct
26 Correct 1342 ms 493072 KB Output is correct
27 Runtime error 1155 ms 524288 KB Execution killed with signal 9
28 Halted 0 ms 0 KB -