## Absolute ValueYou will be given an integer x. The absolute value of x will be within 100. You have to add 1 to x's... |

## Anne's DiaryOn 12 June 1942, Anne received a diary as a gift. She started writing on it. Later, her diary had be... Hard
55/75/281 |

## Are You Coding Me?In the year 1992 AD, little Pranoti started to learn how to write. She already figured out that her ... Moderate
123/146/255 |

## Arshiya's First CodeArshiya is just three and she already started programming. She has learned how to write loops. Recen... |

## Arunima CityAfter the big decentralization process, where Dhaka city's population were relocated, a new city cal... |

## Bad Boy EkhlasEkhlas is a bad boy, not the type of bad that you generally admire. When he was little, his primary ... |

## Bad NeighborsIn the strange neighborhood of Nocu, a lot of people lives pretty happily, or so they think. Like mo... |

## Bad Neighbors 2As some of you already know, Nocu City has a history of having bad neighbors. These bad ones, take a... |

## Be Like HasibHasib, the famous programmer, uses a little game when he teaches Binary Search to his students. He r... |

## Brain PleasedLike most of the other teenage girls, Shabnam loves to generate strings. But recently, she discovere... |

## Byang of InterestByang is the most famous detective of Dhaka City. He has just received a secret document regarding h... Hard
2/7/46 |

## Byang's Day Out!Byang and his little brother Kuno loves Cricket. But they never went to the stadium to watch a match... |

## Count the ChaosImagine, you have an array of integers of size NNN. At each index of this array is a unique integer ... |

## Count the OddsSometimes, contestants tend to look for patterns in problem descriptions. They try to figure out the... |

## Data StructureThe operations that are performed in a data structure can be categorized into two types: query and u... |

## Digits of PiLet’s talk about one fascinating fact about circles. For that, let’s perform the following experimen... Moderate
57/62/88 |

## Elementary Arithmetic - 2Long ago, after learning how to add two numbers, Shakib came to know about multiplication. Multiplic... |

## Expected Values From Bubble SortBubble sort is a sorting algorithm that can sort an array of numbers in increasing order. In each of... |

## Exponential GrowthYou will be given two integers X and N, you have to calculate XN modulo 1000000007. |

## Find LCMThe Least Common Multiple of two integers aaa and bbb is the smallest integer xxx, such that xxx is ... Moderate
167/177/307 |

## Flower GardenTrisha and her little sister Rafa loves gardening. They plant trees and water them everyday. When th... Hard
5/21/54 |

## Geometry ForeverFear no more, this is a problem of geometry! When Moyna was little, he had a math teacher named Shuk... |

## Ghosh vs DattaAbout two hundred years ago, a serious dispute evoked between the two neighboring colonies of Khulna... |

## How Many Pairs of LCM?A Common Multiple of two integers a and b is an integer X, such that both a and b divides X. A numbe... |

## InterviewYou have been called to an interview at Jifatsum, a company you’ve never heard of and who supposedly... Hard
13/26/82 |

## Jewel the MagicianJewel is a promising magician. Recently, he has learned a technique to mesmerize his audience. Let's... Moderate
139/208/664 |

## Kingdom of CrisisIn a kingdom far away, NNN people live in a circle of harmony. Literally, they have constructed a ci... Moderate
99/117/249 |

## Kingdom of Crisis ContinuesThe economic crisis continues in our beloved kingdom. The king has asked the data scientists to coll... |

## Legacy of _sunnyTasnim Imran Sunny is the fifth Bangladeshi red coder from Topcoder. This problem is to pay tribute ... Hard
29/49/178 |

## Life of DecimalsGiven any circle, if you divide the circumference of that circle with its diameter, you would always... |

## Life of PhiThe Great Khami is learning Number Theory. He is very excited to know that Euler's Totient Function ... |

## Metro Rail BlocksThe city of Dhaka is experiencing the construction of metro rails. Imagine one such metro rail spans... |

## Minimize the OddsRidoy is a world class programmer. He writes his programs with a lot of care so that the odds of a b... Moderate
70/77/135 |

## Minimum ExcludedIn a given set of integers, the "mex" or the minimum excluded value is the smallest non-ne... Moderate
22/39/163 |

## Monk in the JungleThe Great Monk Maruf is planning to visit the jungle of Amazon. He loves to prepare himself rigorous... |

## Mystery of FibonacciFibonacci sequence is a recursive sequence that depends on the following definition: Fib(N) = Fib(N-... |

## Nearest Co-PrimeTwo numbers are relatively prime or co-prime if their greatest common divisor is 111. In this proble... Moderate
275/290/436 |

## Partition MagicThe Great Researcher Dr. Bari loves to do research. Once he was doing research on VLSI Circuit Desig... Moderate
1/3/14 |

## Perplexity of PermutationsA permutation of N integers from 1 to N is an array where each number has appeared exactly once in t... |

## Prisoners of MusabadIn the city of Musabad, criminals are punished heavily. Once an enemy is caught, he is kept in the j... |

## Shhh! Don't Tell!The Bad guys are using the social media to spread their malicious messages to the mass. They have co... Hard
35/61/341 |

## Sofdor Ali's Black and White TreeSofdor Ali loves Computer Science. He prefers hexadecimal number system to decimals, just because it... |

## Sofdor Ali's Magical Blackboard!Sofdor Ali found interest in mathematics very early in his life. And now, he wants to spread this in... |

## Sofdor Ali's RestaurantOne of Sofdor Ali’s greatest accomplishment was his Biriyani restaurant! Unlike the traditional rest... |

## Sweeper's DillemmaMinesweeper is a popular single-player puzzle video game from the 60's. It still enjoys the privileg... Hard
5/5/45 |

## The Best Gift EverIn the world of computing, giving gifts like arrays are completely acceptable. Instead of exchanging... |

## XOR MasterImam has been participating in online programming contests for years. His goal is to become a "... |

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