m, n = map(int, input().split())
lst = []
for i in range(m, n + 1):
    if i % 2 != 0:
        lst.append(i)
print(sum(lst))

5cbbbb83e2853211f6cf88b0843d07e8a5406607
<mask token>

<mask token>
for i in range(m, n + 1):
    if i % 2 != 0:
        lst.append(i)
print(sum(lst))

m, n = map(int, input().split())
lst = []
for i in range(m, n + 1):
    if i % 2 != 0:
        lst.append(i)
print(sum(lst))
