Array Partition Today Leena learnt about subarrays and partitions. Given an array $A$, a subarray of this array is a... |

Bi-Element Subsequence You are participating in a game show. In the final round, the host pulls up a large sequence of posi... |

Costly Array Oyler received a peculiar homework from his school. The teacher gave him a positive number $n$ and t...
Moderate
62/92/304 |

Count the Deliveries Lazim has recently decided to open a pizza restaurant. His restaurant’s speciality is that they can ...
Moderate
16/40/129 |

Create Some Walls! Mahdi has finally found some time to build his dream house. He had been looking for some cool design... |

Dividing the Gifts Today is a very good day in CSEmpur because Tuktuki has bought N gifts! Tuktuki wants to give these ... |

GCD and Sum Congratulations! You’ve been hired in “Buggy Software Ltd.” And you’ve been already given your first... |

GCD, Divisor, Count! I like short statements and you should too so here's the statement without further ado You are give... |

Give Me My Vector I am in a hurry. I have n 2D vectors. And I have created all possible subsets of these n vectors. Fo...
Moderate
3/5/42 |

Halting Assembly Oyler is learning about assembly programming in his class. To explain jump instruction easily, his t...
Moderate
11/12/34 |

How Do You Make a Problem? I am very busy these days. So when I was told, I have to create a problem for the contest, I was sli... |

Inversions and Goodbye It's time to say goodbye to CSEmpur, at least for today. And so you wanted to give the citizens of C... |

Maximize Mismatch You are given a permutation $P$ of number $1, \cdots , n$ (I.E. each number occurs exactly once). No...
Easy
23/25/51 |

Not Nim Alice and Bob recently learned about Nim. In a Nim game, two players play a game on several stacks o... |

Oyler's Geometric Jumps The road from Oyler’s home to his school has nsteps, where his home is at step 1 and his school is a...
Hard
6/7/34 |

Productive Employees Congratulations on becoming the new boss of "Horizontal Company, branch: Sylhet"! But now you have a... |

Pudding and Coins Pudding is playing a game that has n levels. There are a total of n(n+1)/2 coins spread out among th... |

Random Graphs This problem is very easy. There's a graph of $N$ nodes. Each edge $u-v$ ($u >= v ; u = v$ is possib... |

Rotation Dilemma Akash has two favorite convex polygons A and B. But one of his new year resolution for 2020 is to ha... |

Shortest Path, Yet Again? Mr O is teaching Algorithms 101 to his students. The class just finished learning BFS and now he wan... |

The Answer to Everything What is the answer to the ultimate question of Life, the universe, and everything? It is You will be... |

The Very Last Exam You have spent the last twenty years studying competitive programming. Now only one exam stands betw...
Moderate
1/2/26 |

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