aa
Merge branch 'master' of https://github.com/CodingYue/acm-icpc

Conflicts:
	acm-summary/tex/Train0818.tex
	acm-summary/tex/Wuhan-Reginal-09.tex
Merge branch 'master' of https://github.com/CodingYue/acm-icpc

Conflicts:
	acm-summary/tex/Train0818.tex
some solutions on 8-19