func shellSort(unsorted []int, n int) {
var i, j, gap int
var temp int
for gap = n/2; gap > 0; gap /= 2 {
for i = gap; i < n; i++ {
for j = i - gap; j>=0 && unsorted[j]>unsorted[j+gap]; j-=gap {
temp = unsourted[j]
unsorted[j] = unsorted[j+gap]
unsorted[j+gap] = temp
}
}
}
}