Blue Bridge Cup algorithm training ALGO-139 S01 String

Algorithm Training S01 String
Time limit: 1.0s memory limit: 256.0MB
Problem description
S01 string is initially "0"
Transform as follows
0 Change to 01
Input format
1 integers (0~19)
Output format
S01 string after n-Times transformation
Sample input
3
Sample output
101
Data size and conventions
0~19

Example code:

1 ImportJava.util.Scanner;2 3  Public classMain {4     StaticStringBuffer SB =NewStringBuffer ();5      Public Static voidMain (string[] args) {6Scanner sc =NewScanner (system.in);7         intn =sc.nextint ();8 9         if(n = = 0){TenSystem.out.println ("0"); One}Else{ AF (N, "0"); -         } - System.out.println (SB); the     } -  -     Private Static voidFintN, String s) { -String str= ""; +  -         if(N < 0) +             return; An--; at          for(inti = 0; I < s.length (); i++){ -str = s.substring (i, i+1); -             if(Str.equals ("0")){ -str = "1"; -}Else if(Str.equals ("1")){ -str = "01"; in             } -  to f (n, str); +  -             if(n = = 0 ){ the sb.append (str); *             } $         }Panax Notoginseng     } -}

Blue Bridge Cup algorithm training ALGO-139 S01 String