value=int(raw_input("Enter a positive integer: "))
if value < 1:
    print "You must enter a number greater than zero"
else:
    sum=0
    sumstr=""
    for x in range(1,value+1):
        if len(sumstr) > 0:
            sumstr=sumstr + " + "
        sumstr=sumstr+str(x)
        sum += x
    print "Output = "+str(sum)+" ("+sumstr+")"