import random

def func(x, A, B):
    if x > A:
        return B
    elif 0 <= x <= A:
        return (2 * B * x / A) - (B * x**2 / A**2)
    elif -A <= x < 0:
        return (2 * B * x / A) + (B * x**2 / A**2)
    else:
        return -B

x_values = [random.uniform(-5, 12) for _ in range(100)]

params = [(5, 7), (3, 4), (8, 12)]

with open('test.txt', 'w', encoding='utf-8') as f:
    for A, B in params:
        f.write(f'\nПараметры: A = {A}, B = {B}\n')
        f.write('xi           yi\n')
        f.write('----------------\n')
        
        for x in x_values:
            y = func(x, A, B)
            f.write(f'{x:10.5f}   {y:10.5f}\n')