첫번째 방법

def solution(sides):
answer = 0
min_num, max_num=0,0
if sides[0]<sides[1]:
min_num, max_num = sides[0], sides[1]
else :
max_num, min_num = sides[0], sides[1]

for i in range(max_num-min_num+1, max_num+1):
    answer+=1
    
for i in range(max_num+1, max_num+min_num):
    answer+=1

return answer

두번째 방법

def solution(sides):
return sum(sides) - max(sides) + min(sides) - 1