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,"")
}