#include <bits/stdc++.h>
#ifndef getchar_unlocked
#define getchar_unlocked getchar
#endif // getchar_unlocked
inline int readint() {
	char zn;
	bool m = false;
	while (1) {
		zn = getchar_unlocked();
		if(zn == '-') m = true;
		if (zn >= '0' && zn <= '9') break;
	}
	int x = 0;
	while (1) {
		x = (x << 1) + (x << 3) + zn - '0';
		zn = getchar_unlocked();
		if (zn < '0' || zn > '9') return m? -x : x;
	}
}
using namespace std;
int main()
{
    int n = readint();
    n = 1<<n;
    int* tab = new int[n];
    int t = readint();
    for(int i = 0; i < n; i++)
    {
        tab[i] = readint();
    }
    if(t % 2)
    {
        for(int i = n-1; i >= 0; i--)
        {
            printf("%d ", tab[i]);
        }
    }else
    {
        for(int i = 0; i < n; i++)
        {
            printf("%d ", tab[i]);
        }
    }
}
        | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 | #include <bits/stdc++.h> #ifndef getchar_unlocked #define getchar_unlocked getchar #endif // getchar_unlocked inline int readint() { char zn; bool m = false; while (1) { zn = getchar_unlocked(); if(zn == '-') m = true; if (zn >= '0' && zn <= '9') break; } int x = 0; while (1) { x = (x << 1) + (x << 3) + zn - '0'; zn = getchar_unlocked(); if (zn < '0' || zn > '9') return m? -x : x; } } using namespace std; int main() { int n = readint(); n = 1<<n; int* tab = new int[n]; int t = readint(); for(int i = 0; i < n; i++) { tab[i] = readint(); } if(t % 2) { for(int i = n-1; i >= 0; i--) { printf("%d ", tab[i]); } }else { for(int i = 0; i < n; i++) { printf("%d ", tab[i]); } } } | 
 
            
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