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 C (judge verdict: Time Limit Exceeded)

#include<stdio.h>
#include<ctype.h>

int main()
{
	char c[1200];
	int i,n;
	n=0;
	char a[1200];
	
	while(1){
	scanf("%c",&a[n]);
		if(a[n] == '/n'){
			break;
		}
		c[n] = a[n];
		
	if('A' <= a[n] && a[n] <= 'Z') {
      c[n] = a[n] + 32;
    } else if(a[n] >= 'a' && a[n] <= 'z') {
      c[n] = a[n] - 32;
  
    }
      
      
    n=n+1;;
      
  }
    
  for(i=0; i<n ; i++) {
    printf("%c" ,c[i]);
  }
  printf("\n"); 
  return 0;
    
}