logics

import random

def pretty_print(mas):
    print ('-'*10)
    for row in mas:
        print(*row)
    print ('-' * 10)

def get_number_from_index(i,j):
    return i*4+j+1

def get_index_from_number(num):
    num-=1
    x, y = num//4, num%4
    return x, y

def insert_2_or_4(mas, x, y):
    if random.random()<=0.75:
        mas[x] [y] = 2
    else:
        mas[x][y] = 4
    return mas

def get_empty_list(mas):
    empty = []
    for i in range(4):
        for j in range(4):
            if mas[i] [j]==0:
                num = get_number_from_index(i, j)
                empty.append(num)
    return empty

def is_zero_in_mas(mas):
    for row in mas:
        if 0 in row:
            return True
    return False

def move_left(mas):
    for row in mas:
        while 0 in row:
            row.remove(0)
        while len(row)!=4:
            row.append(0)
    for i in range(4):
        for j in range(3):
            if mas[i][j] == mas[i][j+1] and mas [i] [j] !=0:
                mas[i][j] *=2
                mas[i].pop(j+1)
                mas[i].append(0)
    return mas

def move_right(mas):
    for row in mas:
        while 0 in row:
            row.remove(0)
        while len(row)!=4:
            row.insert(0)
    for i in range(4):
        for j in range(3,0,-1):
            if mas[i][j] == mas[i][j - 1] and mas[i][j] != 0:
                mas[i][j] *= 2
                mas[i].pop(j - 1)
                mas[i].insert(0,0)
    return mas