Write the definition of a subprogram `interschimba` that receives through two parameters, `a` and `b`, two pointers to integer values and swaps the values stored at the received addresses (so after the call, the value at address `a` is the original value from `b` and vice versa). Then write a main program that reads from standard input a non-zero natural number `n` and then `n` integers separated by spaces or newlines. The program prints the numbers sorted in ascending order, separated by single spaces, on a single line. **The sorting must be performed using exclusively calls to the subprogram `interschimba`** to swap elements of the array.