Largest Prime A positive integer number n is called a prime number, if it is only divisible by 1 and n itself, whe... |

Easy Prime! There are N numbers in an array. You will have Q queries. In each query, you can make 2 operations. ... |

Challenging Lover Greetings to all of you. You must have heard about our star programmer Rafat bhai. One day he went o... |

Zootopia Judy Hopps , a rookie officer joined Zootopia Police Department. She was fond of working sincerely f... |

Prime Range Prime Numbers are such numbers which are only divided by 1 and the number itself. 2, 3, 5, 7, 11, 13... |

Half Measures The numbers 1,2,3,⋯n (each integer from 1 to n once) are written on a board. In one operation, Jesse... |

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

Lucky Shirt Marjokes is a very famous comedy personality in Byteland. He is a poet, a writer, a singer and an ac... |

Chowdhury Saheb & the Numbers You like short description of problems? Me too! Let's go to an easy problem. You are given an array ... |

Oh Functions Let’s define functions f and g as: f(x) = 2 * ( f(x-1) + g(x-1) - 1 ) * ( f(x-1) + g(x-1) - 3 ) + 12... |

I Did Not Do the Assignment Professor Petr is very angry over some of his students now-a-days for not doing assignment. He wants... |

Left Prime Prime numbers are the ones which can only be divided by 1 and the number itself. 2, 3, 5, 7, 11, 13 ... |

Secret Meeting The world is terrified by Pandas! After a miraculous chemical explosion, they became smarter; and ev... |

Love Letters! Lately Fahim is getting a lot of love letters. A LOT of love letters. Since he is confused about whi... |

Equation Equals Hazards You are given the equation, GCD(A,M) = 1. You have to determine whether there exists at least one in... |

Zacob the Batsman It's known that Zacob is a reliable batsman of LU CSE Cricket Team. Also as long as he is on the cre... |

Laali Vs Bessie One day Raju discovered USACO and from that day he would spend all his time solving problems. Laali ... |

Sofdor Ali and the Puzzle of Weights Sofdor Ali is one of the most famous scientists of Bangladesh. He is also well known for his puzzle ... |

Meena O Dosto Sele Dosto sele Dipu and his friends used to disturb Rita Apu everyday on her way to school singing , " র... |

Fast Co-Prime Two numbers A and B are called co-prime if the only common positive factor of the two numbers is 1. ... |

Correct the Sieve Sieve of Eratosthenes is a fast algorithm for finding prime numbers in larger ranges. According to W... |

Trick or Trees One day, Raju was out roaming in the woods,when he suddenly stumbled upon a large garden. There were... |

Switches Technology is going ahead very fast. How can we know what will we get in future? One day you met a g... |

Find the primes? For a positive integer n, let’s define a function f: f(n) = sum of positive integers less than n whi... |

Meera and Solo Chocolates Meera bought candies from the store. She is now going to distribute those among her N friends. She m... |

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