Submission #411873

#	Time	Username	Problem	Language	Result	Execution time	Memory
411873		Killer2501	Secret (JOI14_secret)	C++14	0 / 100	553 ms	4788 KiB

secret

#include<bits/stdc++.h>
#include "secret.h"
#define pll pair<ll, ll>
#define fi first
#define se second
#define pb push_back
#define task "hopscotch"
#define pii pair<ll, pll>
using namespace std;
using ll = long long;
const int  N = 1e4+55;
const ll mod = 998244353;
const ll base = 350;
const ll cs = 331;
ll m, n, t, k, a[N], ans, tong, b[N], c[N], d[N], P[N][22];
vector<ll> adj[N], kq;
ll pw(ll k, ll n)
{
    ll total = 1;
    for(; n; n >>= 1)
    {
        if(n & 1)total = total * k % mod;
        k = k * k % mod;
    }
    return total;
}

void build(int l, int r, int lv)
{
    if(l == r)return;
    ll mid = (l + r)  / 2;
    P[mid][lv] = b[mid];
    P[mid+1][lv] = b[mid+1];
    for(int i = mid-1; i >= l; i --)P[i][lv] = Secret(b[i], P[i+1][lv]);
    a[mid+1] ^= (1<<lv);
    for(int i = mid+2; i <= r; i ++)
    {
        P[i][lv] = Secret(b[i], P[i-1][lv]);
        a[i] ^= (1<<lv);
    }
    build(l, mid, lv+1);
    build(mid+1, r, lv+1);
}

void Init(int n, int A[])
{
    m = n;
    for(int i = 0; i < m; i ++)b[i] = A[i];
    build(0, m-1, 0);
}
int Query(int l, int r)
{
    if(l == r)return b[l];
    int id = __builtin_ctz(a[l]^a[r]);
    return Secret(P[l][id], P[r][id]);
}

• Subtask 1: 0 / 100