Series37. An integer K and K sets of nonzero integers are given. Each set contains at least two elements, the sign of its completion is the number 0. Find the number of sets whose elements increase or decrease.

Solution in Python 3:

import random

K = random.randrange(1,9)

print("K = ",K)

N = 10
count_inc = 0
count_dec = 0
for i in range(0,K):
    x_prev = random.randrange(1,N)
    print(x_prev,end="; ")
    x = random.randrange(1,N)
    print(x,end="; ")
    
    if x > x_prev:
        flag_inc = True
    else:
        flag_inc = False
    if x < x_prev:
        flag_dec = True
    else:
        flag_dec = False
        
    while True:
        x_prev = x
        x = random.randrange(0,N)
        print(x,end="; ")
        if x == 0:
            break
        if not (flag_inc and x > x_prev):
            flag_inc = False
        if not (flag_dec and x < x_prev):
            flag_dec = False
    print()
    if flag_inc:
        count_inc += 1
    if flag_dec:
        count_dec += 1
print("Number of increasing series: ",count_inc)
print("Number of decreasing series: ",count_dec)
print("Number of increasing or decreasing series: ",count_inc + count_dec)