A Boring Game Alice and Bob are playing a game with a tree with n nodes. Alice always plays first, and the two pla... |

Bad XOR 2 (Hard) So after successfully becoming many people's nightmare, XOR has struck again, this time to haunt you... |

Brush Drawing Arav is a curious young boy. He is learning to draw circles. He only got one color but a lot of brus... |

Convex Hull Generator You have to generate a convex polygon which has N points each Xi is distinct and is between 1 and N... |

No GCD You are given N integers. Each integer is square free (i.e. it has no divisor which is a square numb... |

Number, Segment, Prefix - All In One (Hard) Xiao Po is building a validation framework for his current project. He is now stuck with this proble...
Moderate
3/5/6 |

Sequence Query You are given N integer numbers (A1,A2,A3…AN). You will also be given some query. Each query wil...
Moderate
13/20/93 |

Shopping There are two gift shops in the city. They are going to merge together to create a bigger company. Y... |

Village Fair 2 There are N houses in a village far away from here. They are numbered from 1 to N. For this problem ... |

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