Submission #761455

#	Time	Username	Problem	Language	Result	Execution time	Memory
761455		ksu2009en	Brperm (RMI20_brperm)	C++17	100 / 100	2323 ms	51488 KiB

brperm

#include "brperm.h"
#include <iostream>
#include <vector>
#include <string>
#include <math.h>
#include <cmath>
#include <iomanip>
#include <cstdio>
#include <algorithm>
#include <numeric>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <deque>
#include <bitset>
#include <cstring>
#include <unordered_map>
 
using namespace std;
typedef int ll;
 
ll inv(ll n, ll sz){
    string a;
    
    for(int i = sz - 1; i >= 0; i--){
        if((n >> i) % 2 != 0)
            a += "1";
        else
            a += "0";
    }
        
    reverse(a.begin(), a.end());
    ll c = sz - a.size();
    
    for(int i = 0; i < c; i++)
        a += "0";
    
    ll n2 = 0, j = 0;
    
    for(int i = sz - 1; i >= 0; i--){
        if(a[j] == '1')
            n2 += (1 << i);
        
        j++;
    }
    
    return n2;
}
 
vector<pair<ll, ll>> d[20];
string a;
ll mp[500007][20];
 
ll N;
 
void init(int n, const char s[]) {
    N = n;
    for(int sz = 0; sz <= 19; sz++){
        for(int i = 0; i < (1 << sz); i++){
            if(inv(i, sz) > i){
                d[sz].push_back({i, inv(i, sz)});
            }
        }
        
        for(int i = 0; i <= n; i++)
            mp[i][sz] = -1;
    }
    
    for(int i = 0; i < n; i++)
        a.push_back(s[i]);
    
    return;
}
 
 
int query(int l, int k) {
    if(l + (1 << k) - 1 > N)
        return 0;
    
    if(mp[l][k] != -1)
        return mp[l][k];
    
    for(auto i: d[k]){
        if(a[l + i.first] != a[l + i.second])
            return mp[l][k] = 0;
    }
    
    return mp[l][k] = 1;
}

• Subtask 1: 13 / 13
• Subtask 2: 37 / 37
• Subtask 3: 17 / 17
• Subtask 4: 33 / 33