What is the most interesting problem you've seen in Codeforces? Send it in the comments. (If you send the link, write its name next to it).
What is the most interesting problem you've seen in Codeforces? Send it in the comments. (If you send the link, write its name next to it).
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1714F - Build a Tree and That Is It
its interesting
4A - Watermelon
Kyoya and Permutation
Is one of my favorites, it seems weird at first but after giving it some time and think, it turns into a beautiful adhoc problem. I just love it when seemingly complex problems dissolve into familiar patterns.
1879D - Sum of XOR Functions, also the same idea: 1957D - A BIT of an Inequality
Others: 1945G - Cook and Porridge, 888G - Xor-MST
Also the Name of this problem: 1983E - I Love Balls
Final Countdown
Sasha and the Casino