Algorithm Analysis

Read the input string and replace all the characters a with b and vice versa.

Algorithm Implementation

Declare a character array to store the string.

char s[200];

Read the input string.

gets(s);

Iterate through the string characters. Change every letter ‘a’ to ‘b’. Change every letter ‘b’ to ‘a’.

for (int i = 0; i < strlen(s); i++)
    if (s[i] == 'a') s[i] = 'b';
    else if (s[i] == 'b') s[i] = 'a';

Print the resulting string.

puts(s);

Algorithm Implementation – C++

Read the input string.

getline(cin, s);

Iterate through the string characters. Change every letter ‘a’ to ‘b’. Change every letter ‘b’ to ‘a’.

for (int i = 0; i < s.size(); i++)
    if (s[i] == 'a') s[i] = 'b';
    else if (s[i] == 'b') s[i] = 'a';

Print the resulting string.

cout << s << endl;

Java Implementation

import java.util.*;

public class Main
{
    public static void main(String[] args)
    {
        Scanner con = new Scanner(System.in);
        String s = con.nextLine();
        s = s.replace('a', '0');
        s = s.replace('b', 'a');
        s = s.replace('0', 'b');
        System.out.println(s);    
        con.close();
    }
}

Python Implementation

s = input()
s = s.replace('a', '0')
s = s.replace('b', 'a')
s = s.replace('0', 'b')
print(s)