a037. 我也愛偶數 (swap 版) | From: [192.168.120.33] | Post Date : 2025-05-27 19:00

a = list(map(int,input().split(" ")))
b = 0
for i in range(min(a),max(a)+1):
    if i%2==0:
        b+=i
print(b)