Tutorial
Solution
Tutorial
Solution
1836C - k-th equality / 1835A - k-th equality
Tutorial
Solution
1836D - Lottery / 1835B - Lottery
Tutorial
Solution
1836E - Twin Clusters / 1835C - Twin Clusters
Tutorial
Solution
1836F - Doctor's Brown Hypothesis / 1835D - Doctor's Brown Hypothesis
Tutorial
Solution
Tutorial
Solution
Tutorial
Solution