login.md

```flow

st=>start: Start|past:>http://www.google.com[blank]

e=>end: End:>http://www.google.com

op1=>operation: My Operation|past

op2=>operation: Stuff|current

sub1=>subroutine: My Subroutine|invalid

cond=>condition: Yes

or No?|approved:>http://www.baidu.com

c2=>condition: Good idea|rejected

io=>inputoutput: catch something...|request

st->op1(right)->cond

cond(yes, right)->c2

cond(no)->sub1(left)->op1

c2(yes)->io->e

c2(no)->op2->e

```

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