Absolute Value You 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 Diary On 12 June 1942, Anne received a diary as a gift. She started writing on it. Later, her diary had be...
Moderate
57/78/286 |

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

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

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

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

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

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

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

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

Byang of Interest Byang is the most famous detective of Dhaka City. He has just received a secret document regarding h...
Easy
6/12/53 |

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

Coin Collection Neema and Mouri loves to collect coins. When they get bored, they bring out all of their coins. Usua...
Moderate
41/52/99 |

Counting Friends Johnny uses a social network called Supernova. Unlike the other social networks, Supernova does not ... |

Count the Chaos Imagine, you have an array of integers of size N. At each index of this array is a unique integer fr... |

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

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

Digits of Pi Let’s talk about one fascinating fact about circles. For that, let’s perform the following experimen... |

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

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

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

Find LCM The Least Common Multiple of two integers a and b is the smallest integer x, such that x is divided ...
Moderate
180/190/329 |

Flower Garden Trisha and her little sister Rafa loves gardening. They plant trees and water them everyday. When th...
Moderate
7/23/56 |

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

Ghosh vs Datta About 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... |

Interview You have been called to an interview at Jifatsum, a company you’ve never heard of and who supposedly...
Moderate
14/27/83 |

Jewel the Magician Jewel is a promising magician. Recently, he has learned a technique to mesmerize his audience. Let's...
Moderate
183/280/965 |

Kingdom of Crisis In a kingdom far away, $N$ people live in a circle of harmony. Literally, they have constructed a ci...
Moderate
105/123/260 |

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

Legacy of _sunny Tasnim Imran Sunny is the fifth Bangladeshi red coder from Topcoder. This problem is to pay tribute ...
Moderate
31/51/180 |

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

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

Mental Change Anjan was feeling low for nearly a couple of months. To improve his condition, he decided to track h... |

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

Minimize the Odds Ridoy is a world class programmer. He writes his programs with a lot of care so that the odds of a b...
Moderate
72/79/137 |

Minimum Excluded In a given set of integers, the "mex" or the minimum excluded value is the smallest non-negative int...
Moderate
30/51/226 |

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

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

Nearest Co-Prime Two numbers are relatively prime or co-prime if their greatest common divisor is 1. In this problem,...
Moderate
286/304/459 |

Partition Magic The Great Researcher Dr. Bari loves to do research. Once he was doing research on VLSI Circuit Desig...
Moderate
3/5/16 |

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

Prisoners of Musabad In 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...
Moderate
36/63/343 |

Sofdor Ali's Black and White Tree Sofdor 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 Restaurant One of Sofdor Ali’s greatest accomplishment was his Biriyani restaurant! Unlike the traditional rest... |

Sweeper's Dillemma Minesweeper is a popular single-player puzzle video game from the 60's. It still enjoys the privileg...
Hard
7/7/48 |

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

XOR Master Imam has been participating in online programming contests for years. His goal is to become a "Maste... |

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