# see if input is an integer
digits = "0123456789"
inp = raw_input("Type your input: ")
#
# 1. ignore leading, training blankd
#
inp = inp.strip()
#
# 2. be sure something is there
#
length = len(inp)
if length == 0:
    isnum = "no"
else:
    #
    # 3 look for a leading "+" or "-" and skip over it
    #
    position = 0
    if inp[position] == "+" or inp[position] == '-':
        position = 1
    #
    # 4. now just check for digits; if there's a non-digit, say no
    #
    isnum = "yes"
    while position < length:
        if not (inp[position] in digits):
            isnum = "no"
        position = position + 1
#
# 5. announce the result
#
if isnum == "yes":
    print "The integer you typed is", int(inp)
else:
    print "You didn't type an integer"