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Merge branch 'master' of github.com:suijinxin/programming

Conflicts:
	Clang/squares.c
Merge branch 'master' of github.com:suijinxin/programming
Merge branch 'master' of github.com:suijinxin/programming
Merge branch 'master' of github.com:suijinxin/programming
Merge branch 'master' of github.com:suijinxin/programming
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