Problem A
Array of Discord
Eris must be careful not to be discovered while performing her sabotage, so she decides to only change a single digit in one of the numbers in Zeus’ answer. The resulting number may not have any leading zeros (unless it becomes equal to zero in which case a single zero digit is allowed). Eris can only replace a digit with another digit – adding or removing digits is not allowed.
Input
The first line of input contains $n$ ($2 \leq n \leq 100$), the length of Zeus’ answer. The second line contains $n$ integers $a_1, a_2, \ldots , a_ n$ ($0 \leq a_1 \le a_2 \le \ldots \le a_ n \leq 10^{15}$), Zeus’ answer.
Output
If Eris can make the list not be sorted by changing a single digit of one of the numbers, then output $n$ integers $b_1, \ldots , b_ n$, the resulting list of numbers after making the change. Otherwise, output “impossible”. If there are many valid solutions, any one will be accepted.
| Sample Input 1 | Sample Output 1 |
|---|---|
3 2020 2020 2020 |
2021 2020 2020 |
| Sample Input 2 | Sample Output 2 |
|---|---|
2 1 9999999 |
impossible |
| Sample Input 3 | Sample Output 3 |
|---|---|
4 1 42 4711 9876 |
1 42 4711 3876 |
