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584 B

doppelganger

Instructions

You are given 2 strings. Find out if first string contains second string. If it does, return index of the first string where second string occurs last time. If it does not contain, return "-1"

Expected function

package main

func DoppelGanger(s, substr string) int {

}
package main

import "fmt"

func main() {
	var result int

	result = DoppelGanger("aaaaaaa", "a")
	fmt.Println(result) // 6

	result = DoppelGanger("qwerty", "t")
	fmt.Println(result) // 4

	result = DoppelGanger("a", "b")
	fmt.Println(result) // -1
}