# lessons

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A string S consisting of N characters is considered to be properly nested if any of the following conditions is true:S is empty;S has the form "(U)" o

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An array A consisting of N integers is given. A triplet (P, Q, R) is triangular if 0 ≤ P < Q < R < N and:AP + AQ > AR,AQ + AR > AP,AR + AP >

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A non-empty array A consisting of N integers is given. The product of triplet (P, Q, R) equates to AP AQ AR (0 ≤ P < Q < R < N). For exampl

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Write a functionclass Solution { public int solution(int\[] A); }that, given an array A consisting of N integers, returns the number of distinct value

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A non-empty array A consisting of N integers is given. The consecutive elements of array A represent consecutive cars on a road.Array A contains only

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A small frog wants to get to the other side of a river. The frog is initially located on one bank of the river (position 0) and wants to get to the op

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A non-empty array A consisting of N integers is given.A permutation is a sequence containing each element from 1 to N once, and only once.For example,

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An array A consisting of N different integers is given. The array contains integers in the range 1..(N + 1), which means that exactly one element is m

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A small frog wants to get to the other side of the road. The frog is currently located at position X and wants to get to a position greater than or eq

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A non-empty array A consisting of N integers is given. The array contains an odd number of elements, and each element of the array can be paired with

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An array A consisting of N integers is given. Rotation of the array means that each element is shifted right by one index, and the last element of the

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A binary gap within a positive integer N is any maximal sequence of consecutive zeros that is surrounded by ones at both ends in the binary representa