http://codeforces.com/blog/entry/7770
http://blog.watashi.ws/623/andrew-stankevich-1-solutio/
http://blog.watashi.ws/816/andrew-stankevich-2-solution/
http://blog.watashi.ws/970/andrew-stankevich-3-solution/
http://blog.watashi.ws/764/andrew-stankevich-4-solution/
http://blog.watashi.ws/705/andrew-stankevich-5-solution/
http://blog.watashi.ws/1213/andrew-stankevich-6-solution/
http://blog.watashi.ws/2330/stankevich07/
http://blog.watashi.ws/640/andrew-stankevich-8-solution/
http://blog.watashi.ws/833/andrew-stankevich-9-solution/
http://blog.watashi.ws/584/andrew-stankevich-10-solution/
http://blog.watashi.ws/1322/andrew-stankevich-11-solution/
