16-02-18 Probem 1 (A): https://www.urionlinejudge.com.br/judge/en/problems/view/1002 Probem 2 (A): https://www.urionlinejudge.com.br/judge/en/problems/view/1019 HW Probem 3 (A): https://www.urionlinejudge.com.br/judge/en/problems/view/1018 17-02-18 Probem 1 (A): http://codeforces.com/problemset/problem/427/A Problem 2 (A): http://codeforces.com/problemset/problem/934/A