Leetcode Problem #1299: Greatest Element To The Right (#29)

Author: vivekv96

easy/1299-greatest-element-right/main.go

@@ -0,0 +1,20 @@
+// Problem: https://leetcode.com/problems/replace-elements-with-greatest-element-on-right-side/
+package main
+
+func replaceElements(arr []int) []int {
+	max := 0
+
+	for i := len(arr) - 1; i >= 0; i-- {
+		temp := max
+
+		if arr[i] > max {
+			max = arr[i]
+		}
+
+		arr[i] = temp
+	}
+
+	arr[len(arr)-1] = -1
+
+	return arr
+}

easy/1299-greatest-element-right/main_test.go

@@ -0,0 +1,32 @@
+package main
+
+import (
+	"reflect"
+	"testing"
+)
+
+func Test_replaceElements(t *testing.T) {
+	type args struct {
+		arr []int
+	}
+
+	tests := []struct {
+		name string
+		args args
+		want []int
+	}{
+		{
+			name: "first case",
+			args: args{arr: []int{17, 18, 5, 4, 6, 1}},
+			want: []int{18, 6, 6, 6, 1, -1},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := replaceElements(tt.args.arr); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("replaceElements() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}