#1490 def split_fraction(k): results = [] for x in range(k + 1, 2 * k+1): if k * x % (x - k) == 0: # 确保y是整数 y = k * x // (x-k) if x <= y: # 确保x <= y results.append((x, y)) return results def print_fractions(k): for x, y in split_fraction(k): print("1 / {} = 1 / {} + 1 / {}".format(k,x,y)) # 1 / 5 = 1 / 6 + 1 / 30 # 1 / 5 = 1 / 10 + 1 / 10 # 输入 k = int(input()) # 输出 print_fractions(k)