package main import . "fmt" func main(){ var n int var s string Scan(&n,&s) if n%2==1 { Println("No") return } bs:=[]byte(s) x,y:=0,0 for i,c:=range bs { if c=='(' { x++ } else if x>0 { x-- } else { y++ } for i>=0&&y>0&&bs[i]==')'&&i+1