Tên đăng nhập Điểm ▴ Bài tập Giới thiệu
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0

kk

2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0

m = int(input())
n = int(input())
print (2*(mn)-1)

2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0

no

2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0
2901 0 0