y1l=[]
y2l=[]
y3l=[]
ml=[]


xs = float(input('Введите начальное значение: '))
xst = float(input('Введите шаг:              '))
xe = float(input('Введите конечено значение: '))
x=xs
maxy1=0
mixy1=(x**3) - 14.5*(x**2) + 60.7*x - 71

print('┌────────┬────────┬────────┬────────┐')
print('│   X    │   Y1   │   Y2   │   Y3   │')
print('├────────┼────────┼────────┼────────┤')

while round(x, 8)<=xe:
    y1l.append( (x**3) - 14.5*(x**2) + 60.7*x - 71 )
    y2l.append( x - 1.4**x )
    y3l.append( y1l[-1]+y2l[-1] )

    if y1l[-1] > maxy1:
        maxy1=y1l[-1]
    elif y1l[-1] < mixy1:
        mixy1=y1l[-1]

    print('│{:8.4f}│{:8.4f}│{:8.4f}│{:8.4f}│'.format(x,y1l[-1],y2l[-1],y3l[-1]))
    x+=xst

print ('└────────┴────────┴────────┴────────┘')

rz = maxy1 - mixy1


print('Разность между максимальным и минимальным значением y1: {:4.4f}'\
      .format(rz))
print('График функции y1')
x=0
my=80
middle = round( (my/2)*((abs(mixy1) - mixy1)/(rz) ))
print('       xxx         xxx         xxx         xxx         xxx         xxx         xxx         xxx')
y=0
print('       ',end='')
styy=round((rz/7)+1.686)
yy=-140
while y < my:
     if (middle-abs(y))%12==0:
            print('{2.4f}',end='')
            yy+=styy
     else:
            print(' ',end='')
     y+=1
print()
if xs>0 and xe>0:
    print('       ',end='')
    y=0
    while y < my:
        if y == my-1:
            print('─→Y',end='')
        elif y==middle:
            print('┼',end='')
        elif (middle-abs(y))%12==0 :
            print('┴',end='')
        else:
            print('─',end='')
        y+=1
print()
while x < len(y1l):
    y=0
    rx = (x*xst)+xs
    curm = (my*( y1l[x] - mixy1)/( maxy1 - mixy1 ))
    print('{:7.2f}'.format(rx),end='')
    while y <= my:
        if round(curm) < middle and rx!=0 and x!=len(y1l)-2 and x!=len(y1l)-1:
            print(' '*round(curm) + '*' + ' '*round(middle-curm-1)+'│',end='')
            break
        elif round(curm) > middle and rx!=0 and x!=len(y1l)-2 and x!=len(y1l)-1:
            print(' '*middle+'│'+' '*round((curm-middle)-1)+'*',end='')
            break
        elif round(curm) == middle and rx != 0 and x!=len(y1l)-2 and x!=len(y1l)-1:
            print(' '*middle+'*',end='')
            break
        if y == round(curm):
            print('*',end='')
        elif rx == 0 and y == middle:
            print('┼',end='')
        elif rx == 0 and y == my:
            print('→Y',end='')
        elif x == len(y1l)-2 and y == middle:
            print('↓',end='')
        elif x == len(y1l)-1 and y == middle:
            print('X',end='')
        elif round(rx,2) == 0 and (middle-abs(y))%12==0:
            print('┴',end='')
        elif y == middle:
            print('│',end='')
        elif rx ==0:
            print('─',end='')
        else:
            print(' ',end='')
        y+=1
    x+=1
    print()
if xs<0 and xe<0:
    print('       ',end='')
    y=0
    while y < my:
        if y == my-1:
            print('─→Y',end='')
        elif y==middle:
            print('┼',end='')
        elif (middle-abs(y))%12==0:
            print('┴',end='')
        else:
            print('─',end='')
        y+=1
print()