Strange Counter

Bob has a strange counter. At the first second, , it displays the number . At each subsequent second, the number displayed by the counter decrements by . The counter counts down in cycles. In the second after the counter counts down to , the number becomes  the initial...

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Almost Sorted

Given an array with  elements, can you sort this array in ascending order using only one of the following operations? Swap two elements. Reverse one sub-segment. Input Format The first line contains a single integer, , which indicates the size of the array. The next line contains  integers separated by spaces. n d1 d2 ... dn Constraints     All  are...

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Bigger is Greater

In this problem i will explain the following problem taken from hackerrank.com Lexicographically greater means that suppose if we were to arrange these words on a dictionary than s should come just after w. We will use the word "mekhfa" in our example. m e k h ...

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Kangaroo

There are two kangaroos on an x-axis ready to jump in the positive direction (i.e, toward positive infinity). The first kangaroo starts at location  and moves at a rate of  meters per jump. The second kangaroo starts at location  and moves at a rate of  meters...

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