Problem:
Swapping Two Numbers

Write a program which reads two integers x and y, and prints them in ascending order.

Input

The input consists of multiple datasets. Each dataset consists of two integers x and y separated by a single space.

The input ends with two 0 (when both x and y are zero). Your program should not process for these terminal symbols.

Output

For each dataset, print x and y in ascending order in a line. Put a single space between x and y.

Constraints

0 ≤ x, y ≤ 10000

the number of datasets ≤ 3000

Sample Input

3 2
2 2
5 3
0 0

Sample Output

2 3
2 2
3 5

Solution in C (judge verdict: Time Limit Exceeded)

#include <stdio.h>

int main(void){
    int a,b;
    scanf("%d%d",&a,&b);
    while (1) {

    if(a>b)
        printf("%d %d\n",a,b);
    if(a==0&&b==0) break;

    else printf("%d %d\n",b,a);
}
    return 0;
}