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一、题目叙述:
Given a string?s?consists of upper/lower-case alphabets and empty space characters?' '
, return the length of last word in the string.
If the last word does not exist, return 0.
Note:?A word is defined as a character sequence consists of non-space characters only.
For example,?
Given?s?=?"Hello World"
,
return?5
.
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