Problem:
Toggling Cases

Write a program which converts uppercase/lowercase letters to lowercase/uppercase for a given string.

Input

A string is given in a line.

Output

Print the converted string in a line. Note that you do not need to convert any characters other than alphabetical letters.

Constraints

The length of the input string < 1200

Sample Input

fAIR, LATER, OCCASIONALLY CLOUDY.

Sample Output

Fair, later, occasionally cloudy.

Solution in JAVA (judge verdict: Accepted)

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

	public static void main(String[] args) throws IOException {
		// TODO ?????????????????????????????????????????????
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		String input = br.readLine();
		
		for(int i = 0; i < input.length() ; i++){
			char c = input.charAt(i);
			
			if(Character.isLowerCase(c)){
				System.out.print(Character.toUpperCase(c));
			}
			
			else if(Character.isUpperCase(c)){
				System.out.print(Character.toLowerCase(c));
			}
			else {
				System.out.print(c);
			}
		}
		System.out.println();
		
//		String[] tmpArray = br.readLine().split(" ");
//		int n = Integer.parseInt(tmpArray[0]);
//		int m = Integer.parseInt(tmpArray[1]);
//		int l = Integer.parseInt(tmpArray[2]);
//
//		long[][] a = new long[n][m];
//		long[][] b = new long[m][l];
//		long[][] c = new long[n][l];
//
//		for(int i = 0; i < n; i ++){
//			tmpArray = br.readLine().split(" ");
//			for(int j = 0; j < m; j++){
//				a[i][j] = Long.parseLong(tmpArray[j]);
//			}
//		}
//
//		for(int i = 0; i < m; i ++){
//			tmpArray = br.readLine().split(" ");
//			for(int j = 0; j < l; j++){
//				b[i][j] = Integer.parseInt(tmpArray[j]);
//			}
//		}
//
//		for(int i = 0; i < n; i++){
//			for(int j = 0; j < l; j++){
//				for(int k = 0; k < m; k++){
//					c[i][j] += a[i][k]*b[k][j];
//				}
//
//				if(j != 0 ){
//					System.out.print(" ");
//				}
//				System.out.print(c[i][j]);
//			}
//			System.out.println();
//		}


	}

}