feat: Use generic for pigeonholesort and max min Int (#565)

Author: VUHAILAM

math/max/max.go

@@ -1,7 +1,9 @@
 package max
 
+import "github.com/TheAlgorithms/Go/constraints"
+
 // Int is a function which returns the maximum of all the integers provided as arguments.
-func Int(values ...int) int {
+func Int[T constraints.Integer](values ...T) T {
 	max := values[0]
 	for _, value := range values {
 		if value > max {

math/min/min.go

@@ -1,7 +1,9 @@
 package min
 
+import "github.com/TheAlgorithms/Go/constraints"
+
 // Int is a function which returns the minimum of all the integers provided as arguments.
-func Int(values ...int) int {
+func Int[T constraints.Integer](values ...T) T {
 	min := values[0]
 	for _, value := range values {
 		if value < min {

sort/pigeonholesort.go

@@ -4,12 +4,15 @@
 package sort
 
 import (
+	"github.com/TheAlgorithms/Go/constraints"
 	"github.com/TheAlgorithms/Go/math/max"
 	"github.com/TheAlgorithms/Go/math/min"
 )
 
 // Pigeonhole sorts a slice using pigeonhole sorting algorithm.
-func Pigeonhole(arr []int) []int {
+// NOTE: To maintain time complexity O(n + N), this is the reason for having
+// only Integer constraint instead of Ordered.
+func Pigeonhole[T constraints.Integer](arr []T) []T {
 	if len(arr) == 0 {
 		return arr
 	}
@@ -19,15 +22,15 @@ func Pigeonhole(arr []int) []int {
 
 	size := max - min + 1
 
-	holes := make([]int, size)
+	holes := make([]T, size)
 
 	for _, element := range arr {
 		holes[element-min]++
 	}
 
 	i := 0
 
-	for j := 0; j < size; j++ {
+	for j := T(0); j < size; j++ {
 		for holes[j] > 0 {
 			holes[j]--
 			arr[i] = j + min

sort/sorts_test.go

@@ -132,7 +132,7 @@ func TestComb(t *testing.T) {
 }
 
 func TestPigeonhole(t *testing.T) {
-	testFramework(t, sort.Pigeonhole)
+	testFramework(t, sort.Pigeonhole[int])
 }
 
 func TestPatience(t *testing.T) {
@@ -238,7 +238,7 @@ func BenchmarkComb(b *testing.B) {
 }
 
 func BenchmarkPigeonhole(b *testing.B) {
-	benchmarkFramework(b, sort.Pigeonhole)
+	benchmarkFramework(b, sort.Pigeonhole[int])
 }
 
 func BenchmarkPatience(b *testing.B) {