String segment combination

describe

Get an input string s, Minus sign with character (-) Division s, Use the plus sign for the first and last paragraphs (+) Combined output .‪‬‪‬‪‬‪‬‪‬‮‬‭‬‫‬‪‬‪‬‪‬‪‬‪‬‮‬‫‬‪‬‪‬‪‬‪‬‪‬‪‬‮‬‫‬‭‬‪‬‪‬‪‬‪‬‪‬‮‬‭‬‫‬‪‬‪‬‪‬‪‬‪‬‮‬‫‬‭‬‪‬‪‬‪‬‪‬‪‬‮‬‫‬‪‬

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I / O example

Example Input Output

Example 1

Alice-Bob-Charis-David-Eric-Flurry

Alice+Flurry

s = input()
ls = s.split("-")
print("{}+{}".format(ls[0], ls[-1]))

 s.split(k) With k Split for tag s, Generate a list . Pass the title , master split() Use of methods , Be careful ：k It can be a single character , It could be a string .

It can also be in this form ：

a = input()
k=""
for i in a:
    if i == "-":
        break
    else:
        k +=i
j=""
a = a[::-1]
for i in a:
    if i == "-":
        break
    else:
        j +=i
j = j[::-1]
print(k+"+"+j)