package main
import "strings"
/**
* 反转字符串
* @param str string字符串
* @return string字符串
*/
func solve( str string ) string {
// write code here
strs := strings.Split(str,"")
left,right := 0,len(strs)-1
for left < right {
strs[left],strs[right] = strs[right],strs[left]
left++
right--
}
return strings.Join(strs,"")
}