slom

#include <iostream>

using namespace std;

int t[1010][30];
char v[1010];
string s;
int main(){
    int X;
    cin >> X >> s;
    int n=s.size();
    for(int i=0; i<n; i+=2){
        t[i][0]=i/2;
    }for(int i=1; i<n; i+=2){
        t[i][0]=n-i/2-1;
    }
    for(int j=1; j<30; ++j){
        for(int i=0; i<n; ++i){
            t[i][j]=t[t[i][j-1]][j-1];
        }
    }

    for(int i=0; i<n; ++i){
        int a=i;
        int x=X;
        for(int b=29; b>=0; --b){
            while((1<<b) <= x){
                a=t[a][b];
                x-=(1<<b);
            }
        }
        v[a]=s[i];
    }
    for(int i=0; i<n; ++i) cout << v[i];
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED