Submission #893156

#	Time	Username	Problem	Language	Result	Execution time	Memory
893156		Alora	Klasika (COCI20_klasika)	C++17	110 / 110	2348 ms	469952 KiB

klasika

#include <bits/stdc++.h>
#define Alora "cownav"
#define fi(i,a,b) for(int i = a; i <= b; i++)
#define fid(i,a,b) for(int i = a; i >= b; i--)
#define ll long long
#define f first
#define se second
#define pii pair<int, int>
#define getbit(i, j) ((i >> j) & 1)
#define all(v) v.begin(), v.end()
#define pb push_back
#define maxn 200005
const int M = 1e9 + 7;
using namespace std;
int Q, n, m, a[maxn];
vector <int> g[maxn];
struct dl{int x, y, time;}b[maxn];

int in[maxn], out[maxn], tmp;
void dfs(int u){
    in[u] = ++tmp;
    for(auto v: g[u]) dfs(v);
    out[u] = tmp;
}

int xd[maxn*20][3], cnt;
set <int> st[maxn*20];

void add(int num, int time){
    int tt = 0;
    fid(i, 30, 0){
        int c = getbit(num, i);
        if(xd[tt][c] == 0) xd[tt][c] = ++cnt;
        tt = xd[tt][c];
        st[tt].insert(time);
    }
}

bool check(int tt, int l, int r){
    if(tt == 0) return 0;
    auto it = st[tt].lower_bound(l);
    if(it == st[tt].end()) return 0;
    return (*it <= r) ;
}
int get(int l, int r, int num){
    int tt = 0, ans = 0;
    fid(i, 30, 0){
        int c = getbit(num, i);
        if(check(xd[tt][1 - c], l, r)){
            ans += (1 << i);
            tt = xd[tt][1 - c];
        }
        else tt = xd[tt][c];
    }
    return ans;
}
int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(NULL);
	if(fopen(Alora".inp", "r")){
    freopen(Alora".inp", "r", stdin);
    freopen(Alora".out", "w", stdout);}
    cin >> Q;
    n = 1;
    fi(i, 1, Q){
        string s; int x, y;
        cin >> s >> x >> y;
        if(s == "Add"){
            a[++n] = a[x] ^ y;
            g[x].pb(n);
            b[i] = {0, n, n};
        }
        else b[i] = {1, x, y};
    }
    dfs(1);
    add(0, 1);
    fi(i, 1, Q){
        auto[t, x, y] = b[i];
        if(t == 0) add(a[x], in[x]);
        else{
            cout << get(in[y], out[y], a[x]) << '\n';
        }
    }
    return 0;
}

Compilation message (stderr)

klasika.cpp: In function 'int main()':
klasika.cpp:61:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 |     freopen(Alora".inp", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
klasika.cpp:62:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   62 |     freopen(Alora".out", "w", stdout);}
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 11 / 11
• Subtask 2: 22 / 22
• Subtask 3: 33 / 33
• Subtask 4: 44 / 44