Problems by ovis96

Circle Mystery
Here, $A$ is the center of the circle and $BCD$ is a tangent which intersects with the circle at th...
Moderate 96/105/118
Game of Guessing Her Password!
This is an interactive problem. Like everyone, Nubu the random coder girl, has a secret password. On...
Moderate 34/60/352
Holy Tree
What is a tree? A tree is a bidirectional connected graph with no cycle. In a tree, we can create ...
DP, Tree Moderate 24/41/140
Meena, Raju and Mango Tree
Clever girl Meena likes to climb trees. One day her brother Raju, after coming back from school, sai...
Very Easy 9/14/60
Meena Raju and Two Trees
Meena's father gifted Meena and Raju two trees. Since they may quarrel, these two trees are exactly ...
Moderate 3/7/42
Mr Makor And His Friends
Mr Makor has a set S of n integers. He calls a sequence of length k special if every element of the ...
Reduce Articulation Point
Given a tree. Tree is an undirected connected acyclic graph. Wiki You should add exactly one edge t...
Restore Magic Rectangle
Random coder boy Kiny once had a rectangle (2D grid) as quarantine gift. Every random people have so...
Moderate 5/16/38
Subarray Pyramid
An integer sequence $b_1, b_2, \ldots, b_m$ is a pyramid if it satisfies the following conditions: ...
Moderate 46/63/219
Trina Loves Mangoes
Trina loves mangoes. And she is a valuable member of the famous Mango Eaters Community. This communi...
Very Easy 8/13/57
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