https://school.programmers.co.kr/learn/courses/30/lessons/12935
python
def solution(arr):
if len(arr) == 1:
return [-1]
else:
idx = arr.index(min(arr))
return arr[:idx] + arr[idx + 1:]
if __name__ == "__main__":
result = solution([4, 3, 2, 1])
print(result)
[4, 3, 2]