oj.uz

Submission #770039

# Submission time Handle Problem Language Result Execution time Memory
770039 2023-06-30T17:30:18 Z vjudge1 Klasika (COCI20_klasika) C++17
66 / 110
 718 ms 323272 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 <= 2000){
                ans = 0;
                dfs(b);
                cout << ans << endl;
            }
            else cout << solve(pf[a], -1, 1e9) << 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 3 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 4 ms 5408 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 5412 KB Output is correct
12 Correct 3 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 3 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 4 ms 5408 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 5412 KB Output is correct
12 Correct 3 ms 5460 KB Output is correct
13 Correct 5 ms 6340 KB Output is correct
14 Correct 7 ms 7472 KB Output is correct
15 Correct 7 ms 8132 KB Output is correct
16 Correct 8 ms 9700 KB Output is correct
17 Correct 4 ms 6288 KB Output is correct
18 Correct 5 ms 7372 KB Output is correct
19 Correct 6 ms 8044 KB Output is correct
20 Correct 7 ms 8792 KB Output is correct
21 Correct 4 ms 6288 KB Output is correct
22 Correct 5 ms 7372 KB Output is correct
23 Correct 6 ms 8004 KB Output is correct
24 Correct 7 ms 8868 KB Output is correct

Subtask #3
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 390 ms 93320 KB Output is correct
2 Correct 523 ms 169720 KB Output is correct
3 Correct 577 ms 222388 KB Output is correct
4 Correct 673 ms 323272 KB Output is correct
5 Correct 407 ms 91056 KB Output is correct
6 Correct 560 ms 164788 KB Output is correct
7 Correct 617 ms 215604 KB Output is correct
8 Correct 718 ms 313216 KB Output is correct
9 Correct 418 ms 91100 KB Output is correct
10 Correct 524 ms 165816 KB Output is correct
11 Correct 588 ms 217704 KB Output is correct
12 Correct 702 ms 315096 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 3 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 4 ms 5408 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 5412 KB Output is correct
12 Correct 3 ms 5460 KB Output is correct
13 Correct 5 ms 6340 KB Output is correct
14 Correct 7 ms 7472 KB Output is correct
15 Correct 7 ms 8132 KB Output is correct
16 Correct 8 ms 9700 KB Output is correct
17 Correct 4 ms 6288 KB Output is correct
18 Correct 5 ms 7372 KB Output is correct
19 Correct 6 ms 8044 KB Output is correct
20 Correct 7 ms 8792 KB Output is correct
21 Correct 4 ms 6288 KB Output is correct
22 Correct 5 ms 7372 KB Output is correct
23 Correct 6 ms 8004 KB Output is correct
24 Correct 7 ms 8868 KB Output is correct
25 Correct 390 ms 93320 KB Output is correct
26 Correct 523 ms 169720 KB Output is correct
27 Correct 577 ms 222388 KB Output is correct
28 Correct 673 ms 323272 KB Output is correct
29 Correct 407 ms 91056 KB Output is correct
30 Correct 560 ms 164788 KB Output is correct
31 Correct 617 ms 215604 KB Output is correct
32 Correct 718 ms 313216 KB Output is correct
33 Correct 418 ms 91100 KB Output is correct
34 Correct 524 ms 165816 KB Output is correct
35 Correct 588 ms 217704 KB Output is correct
36 Correct 702 ms 315096 KB Output is correct
37 Incorrect 394 ms 97104 KB Output isn't correct
38 Halted 0 ms 0 KB -