代码

#include <algorithm>

#define rg register

int bucket[2][100000];
void sort(unsigned *a, int n) {
	int base = 1 ,len = 1;
	for(rg int i = 1 ; i <= n ; ++i){
		while(a[i] >= base){
			len++;
			base <<= 1;
		}
	}
	
	base = 0;
	int arr[MX];
	while(len--){
		int cnt[12] = {0};
		for(rg int i = 1 ; i <= n ; ++i){
			int tmp = (a[i] >> base) & 1;
			bucket[tmp][++cnt[tmp]] = a[i];
		}
		for(rg int i = 0 ,k = 0 ; i < 2 ; ++i){
			for(rg int j = 1 ; j <= cnt[i] ; ++j){
				a[++k] = bucket[i][j];
			}
		}
		base++;
	}
}

评测结果