Problem of The Day 13 December 2016 — Army Game

Luke is daydreaming in Math class. He has a sheet of graph paper with n rows and m columns, and he imagines that there is an army base in each cell for a total n.m of bases. He wants to drop supplies at strategic points on the sheet, marking each…

Problem of The Day 11 December 2016 — Sock Merchant

John’s clothing store has a pile of n loose socks where each sock i is labeled with an integer,denoting its color. He wants to sell as many socks as possible, but his customers will only buy them in matching pairs. Two socks, i and j,are a…

Problem of The Day 27 December — Monk and his Friends

Monk and his Friends

Monk is standing at the door of his classroom. There are currently N students in the class, i’th student got Aicandies.
There are still M more students to come. At every…

Problem of The Day 29 December — The Football Fest

The Football Fest

The very famous football club Manchester United decided to popularize football in India by organizing a football fest. The fest had many events for different sections of people.
For the…

Problem of The Day 21 December — Tailor Shop

Jaime the Tailor’s new customer wants to add n distinct clusters of buttons to her dress, where each cluster is filled with a distinct number of buttons of a certain color.

Problem of The Day 14 December 2016 — Best Divisor

Kristen loves playing with and comparing numbers. She thinks that if she takes two different positive numbers, the one whose digits sum to a larger number is better than the other. If the sum of digits is equal for both numbers, then she…

Problem of The Day 8 December 2016 — Monk and Divisor Conundrum

Here is another task for you, prepared by Monk himself. So, this is how it goes :

Given an integer array A of size N, Monk needs you to answer T queries for him. In each query, he gives you 2…

Problem of The Day 15 December 2016 — Twins

Lia is fascinated by anything she considers to be a twin. She calls a pair of positive integers, i and j, twins if:

• They are both prime. A prime number is an integer greater than 1 that has no positive divisors other than 1 and…