chore: add sherlock and squares problem

implementation/sherlock_and_squares.go

@@ -0,0 +1,27 @@
+package implementation
+
+import "math"
+
+// https://www.hackerrank.com/challenges/sherlock-and-squares/problem?isFullScreen=false
+
+func squares(a int32, b int32) int32 {
+	var counter int32 = 0
+	var first int32 = 0
+
+	for i := a; i <= b; i++ {
+		sqrt := math.Sqrt(float64(i))
+
+		if math.Ceil(sqrt) == math.Floor(sqrt) {
+			first = int32(sqrt)
+			break
+		}
+	}
+
+	if first != 0 {
+		for i := first; i*i <= b; i++ {
+			counter++
+		}
+	}
+
+	return counter
+}

implementation/sherlock_and_squares_test.go

@@ -0,0 +1,43 @@
+package implementation
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+type SherlockAndSquaresTestCase struct {
+	a      int32
+	b      int32
+	result int32
+}
+
+func TestSherlockAndSquares(t *testing.T) {
+	tests := []SherlockAndSquaresTestCase{
+		{
+			a:      3,
+			b:      9,
+			result: 2,
+		},
+		{
+			a:      17,
+			b:      24,
+			result: 0,
+		},
+		{
+			a:      465868129,
+			b:      988379794,
+			result: 9855,
+		},
+		{
+
+			a:      181510012,
+			b:      293922871,
+			result: 3672,
+		},
+	}
+
+	for _, test := range tests {
+		assert.Equal(t, test.result, squares(test.a, test.b))
+	}
+}