Submission #494512

#	Time	Username	Problem	Language	Result	Execution time	Memory
494512		leaked	Brperm (RMI20_brperm)	C++14	0 / 100	811 ms	135320 KiB

brperm

#include <bits/stdc++.h>
#include "brperm.h"
#define f first
#define s second
#define m_p make_pair
#define vec vector
#define sz(x) (int)(x).size()
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
#define fast_rmi ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);

using namespace std;
const int N=(1<<19);
int pref[N][26];
int work[N][20];

int answ[N][20];
string s;
void init(int n,const char t[]){
    for(int i=0;i<n;i++){
        s+=t[i];
        for(int j=0;j<26;j++){
            pref[i][j]=(i?pref[i-1][j]:0);
        }
        pref[i][s[i]-'a']++;
    }
    for(int j=1;j<20;j++){
        for(int i=0;i<(1<<j);i++){
            ///TODO
            for(int k=0;k<j;k++){
                if((1<<k)&i)
                    work[i][j]+=(1<<(j-k-1));
            }
            answ[i][j]=-1;
        }
    }
}
int query(int i,int k){
    if(k>20 || i+(1<<(k))-1>=sz(s))
        return 0;
    if(answ[i][k]!=-1)
        return answ[i][k];
    int l=i,r=i+(1<<(k))-1;
    for(int j=0;j<26;j++){
        if((pref[r][j]-(l?pref[l-1][j]:0))==(r-l+1))
            return 1;
    }
    int ok=1;
    for(int i=l;i<=r;i++){
        int id=l+work[(i-l)][k];
        if(s[i]!=s[id]){
            ok=0;
            break;
        }
    }
    answ[i][k]=ok;
    return ok;
}
//char * a;

• Subtask 1: 0 / 13
• Subtask 2: 0 / 37
• Subtask 3: 0 / 17
• Subtask 4: 0 / 33