sum=0
for i in range(101):
    sum=sum+i
print("1+2......+99+100={}".format(sum))

import random
num=random.randint(1,100)

_input=1
while(_input!=0):
    _input=eval(input("input a num (1-100),if you want to exit,press 0:"))
    if(_input>num):
        print("too big")
    elif(_input<num):
        print("too small")
    else:
        print("right")