自己的代码，第五题40%，求a了的大佬指导下。。 m = int(input()) a = int(input()) b = int(input()) n = int(input()) bb = [] for i in range(n):     bb.append(int(input())) num = [] for i in range(m+1):     num.append(0) for i in range(a):     # num.append(0)     num[i] = 0 for i in range(a, b+1):     num[i] = 1 for i in range(a+1, m+1):     if i in bb:         num[i] = 0     else:         for j in range(i-b, i-a+1):                 num[i] += (num[j] % (pow(10, 9)+7)) print(num[m])