** Probleme: 'biomech':problema/biomech, 'euclid':problema/euclid, 'matrice3':problema/matrice3, 'zodiac':http://varena.ro/problema/zodiac
* 'Sqrt Trick':blog/square-root-trick
** 'Sqrt Trick Lecture':http://acm.math.spbu.ru/~sk1/mm/lections/mipt2016-sqrt/mipt-2016-burunduk1-sqrt.en.pdf

** Algoritmul lui Mo: 'rangemode':problema/rangemode, 'infinitywar':problema/infinitywar

** 'Algoritmul lui Mo:':http://codeforces.com/blog/entry/7383 'rangemode':problema/rangemode, 'infinitywar':problema/infinitywar

*** 'Pe arbore:':http://codeforces.com/blog/entry/43230 'egal':problema/egal, 'DISTNUM3':https://www.codechef.com/FEB17/problems/DISTNUM3
*** 'Update-uri':http://codeforces.com/blog/entry/44711?#comment-292040
** Probleme: 'CF 702 F':http://codeforces.com/problemset/problem/702/F, 'CF 342 E':http://codeforces.com/problemset/problem/342/E, 'rafaela':problema/rafaela, 'Tree of Almost Clean Money':http://codeforces.com/gym/100818/attachments/download/3890/20152016-acmicpc-southeastern-european-regional-programming-contest-seerc-2015-en.pdf, 'rutier':problema/rutier

** 'Expected value':https://en.wikipedia.org/wiki/Expected_value: 'Tequila':problema/tequila, 'Sms':problema/sms, 'Expected Velea':problema/expected, 'Albume':problema/albume, 'Diapazon':problema/diapazon
** 'Ballot theorem':https://goo.gl/6kQZ8l
** Markov chains

*** Probleme: 'Humpty Dumpty':http://acm.timus.ru/problem.aspx?space=1&num=1766, 'Random Run':http://codeforces.com/problemset/gymProblem/101081/B

*** Probleme: 'Humpty Dumpty':http://acm.timus.ru/problem.aspx?space=1&num=1766, 'Random Run':http://codeforces.com/problemset/gymProblem/101081/B, 'Zombie March':https://www.hackerrank.com/challenges/zombie-march

* 'Principiul includerii si excluderii':principiul-includerii-si-excluderii
** Probleme: 'cowfood':problema/cowfood, 'indep':problema/indep, 'frac':problema/frac, 'CF 451E':http://codeforces.com/contest/451/problem/E, 'light2':problema/light2, 'trickortreat':http://varena.ro/problema/trickortreat
* 'Lema lui Abel':https://en.wikipedia.org/wiki/Summation_by_parts