print("Draw a grid of any size, up to 32 cells in each direction!")

def checknum(d):
    msg = "Please enter a whole number between 1 and 32."
    while True:
        fin = input("Enter the number of cells " + d + ": ")
        try:
            fin = float(fin)
        except ValueError:
            print(msg)
            continue
        if fin < 1 or fin > 32:
            print(msg)
            continue
        fout = int(fin)
        if fin != fout:
            print(msg)
            continue
        break
    return fout

x = checknum("across")
y = checknum("down")
lines = []

#top border
lines.append("╔═")
for i in range(x-1):
    lines[0] += "╤═"
lines[0] += "╗"

#first row of cells
lines.append("║")
for i in range(x-1):
    lines[1] += " │"
lines[1] += " ║"

#rest of the rows and inner horizontal lines
for i in range(2,2*y,2):
    lines.append("╟")
    rowline=""
    for j in range (x-1):
        rowline += "─┼"
    lines[i] += rowline + "─╢"
    lines.append(lines[1])

#bottom border
lines.append("╚═")
for i in range(x-1):
    lines[len(lines)-1] += "╧═"
lines[len(lines)-1] += "╝"

for i in range(len(lines)):
    print(lines[i])