add parallel algorithms
add parallel algorithms
Yexiaoxing/CUHKSZLib,alesiong/CUHKSZLib,cuhkshenzhen/CUHKSZLib,alesiong/CUHKSZLib,Yexiaoxing/CUHKSZLib,cuhkshenzhen/CUHKSZLib,cuhkshenzhen/CUHKSZLib,alesiong/CUHKSZLib,Yexiaoxing/CUHKSZLib