# -*- coding: utf-8 -*-
"""
Created on Wed May  5 16:11:11 2021
# a4-1 计算两个正整数间所有整数的和
@author: Admin
"""
#定义函数addab(a,b)
def addab(a,b):
    s=0
    for i in range(a,b+1):
        s=s+i
    return s
     
x = int(input("请输入第一个数："))
y = int(input("请输入第二个数："))
#调用函数
result = addab(x,y)
    
print('{}+...+{}={}'.format(x,y,result))