- Time limit: 1.00 s
- Memory limit: 512 MB
You are given an array of n integers, and your task is to find four values (at distinct positions) whose sum is x.
Input
The first input line has two integers n and x: the array size and the target sum.
The second line has n integers a_1,a_2,\dots,a_n: the array values.
Output
Print four integers: the positions of the values. If there are several solutions, you may print any of them. If there are no solutions, print IMPOSSIBLE
.
Constraints
- 1 \le n \le 1000
- 1 \le x,a_i \le 10^9
Example
Input:
8 15 3 2 5 8 1 3 2 3
Output:
2 4 6 7