救基友記2

Problem Description

Input

每組測試資料包括包括一個字串s

Output

Example Input

2
abjbjhcRazYdcRazYCraZy
bbbnnnbbn

Example Output

abjbjhCrAZydCrAZycRAzY
bbbnnnbbn

正確答案：

import java.util.Scanner;

public class Main {
	
	public static void main(String args[]) {
		Scanner in = new Scanner(System.in);
		String str;
		int t = in.nextInt();
		while( t-->0 ){
			str = in.next();
			char []c = str.toCharArray(); 
			if( c.length>4 ){
				for( int i=4; i<c.length; i++ ){  
		            if( c[i]=='y' && c[i-1]=='Z' && c[i-2]=='a' && c[i-3]=='r' && c[i-4]=='C' )  {
		                c[i-4] = 'c';
		                c[i-3] = 'R';
		                c[i-2] = 'A';
		                c[i-1] = 'z';
		                c[i] = 'Y';  
		            }
		            if( c[i]=='Y' && c[i-1]=='z' && c[i-2]=='a' && c[i-3]=='R' && c[i-4]=='c' ){
		            	c[i-4] = 'C';
		            	c[i-3] = 'r';
		            	c[i-2] = 'A';
		            	c[i-1] = 'Z';
		            	c[i] = 'y';  
		            }
		        }  
			}
			for( int i=0; i<c.length; i++ )
				System.out.print(c[i]);
			System.out.println();		
		}
	}
}
 

錯誤答案（有哪位朋友可以指教一下嗎）：

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {		
		Scanner in = new Scanner (System.in);
		int n = in.nextInt();
		while( n-->0 ){
			String s;
			s = in.next();
			StringBuffer s1 = new StringBuffer();
			int i, j;
			for( i=0; i<s.length(); i++ ){
				if( s.charAt(i)=='c' && s.charAt(i+1)=='R' && s.charAt(i+2)=='a' && s.charAt(i+3)=='z' && s.charAt(i+4)=='Y' ){
					for( j=i; j<=i+4; j++ ){
						
						if(Character.isUpperCase(s.charAt(j))){  
				        	 s1.append(Character.toLowerCase(s.charAt(j)));                
				         }else if(Character.isLowerCase(s.charAt(j))) 
				             s1.append(Character.toUpperCase(s.charAt(j)));
					}
					i += 4;
				}
				else if( s.charAt(i)=='C' && s.charAt(i+1)=='r' && s.charAt(i+2)=='a' && s.charAt(i+3)=='Z' && s.charAt(i+4)=='y' ){
					for( j=i; j<=i+4; j++ ){
						if( Character.isUpperCase( s.charAt(j) ) ){  
				        	 s1.append(Character.toLowerCase(s.charAt(j)));                
				         }else if(Character.isLowerCase(s.charAt(j))) 
				             s1.append(Character.toUpperCase(s.charAt(j)));
					}
					i += 4;
				}
				else
					s1.append( s.charAt(i));
			}
			System.out.println(s1);
		}
		in.close();
	}
}