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You are given an integer array
stations that represents the positions of the gas stations on the x-axis. You are also given an integer
You should add
k new gas stations. You can add the stations anywhere on the x-axis, and not necessarily on an integer position.
penalty() be the maximum distance between adjacent gas stations after adding the
k new stations.
Return the smallest possible value of
penalty(). Answers within
10-6 of the actual answer will be accepted.
Given an integer array
nums, return the number of all the arithmetic subsequences of
A sequence of numbers is called arithmetic if it consists of at least three elements and if the difference between any two consecutive elements is the same.
[1, 3, 5, 7, 9],
[7, 7, 7, 7], and
[3, -1, -5, -9]are arithmetic sequences.
[1, 1, 2, 5, 7]is not an arithmetic sequence.
A subsequence of an array is a sequence that can be formed by removing some elements (possibly none) of the array.
[2,5,10]is a subsequence of
The test cases are generated so that the answer fits in 32-bit integer.
You are given an integer
n. You have an
n x n binary grid
grid with all values initially
1‘s except for some indices given in the array
ith element of the array
mines is defined as
mines[i] = [xi, yi] where
grid[xi][yi] == 0.
Return the order of the largest axis-aligned plus sign of 1*’s contained in*
grid. If there is none, return
An axis-aligned plus sign of
1‘s of order
k has some center
grid[r][c] == 1 along with four arms of length
k - 1 going up, down, left, and right, and made of
1‘s. Note that there could be
1‘s beyond the arms of the plus sign, only the relevant area of the plus sign is checked for
You are given a string
s of lowercase English letters and an integer array
shifts of the same length.
shift() of a letter, the next letter in the alphabet, (wrapping around so that
shift('a') = 'b',
shift('t') = 'u', and
shift('z') = 'a'.
Now for each
shifts[i] = x, we want to shift the first
i + 1 letters of
Return the final string after all such shifts to s are applied.
Design a data structure that follows the constraints of a Least Recently Used (LRU) cache.
LRUCache(int capacity)Initialize the LRU cache with positive size
int get(int key)Return the value of the
keyif the key exists, otherwise return
void put(int key, int value)Update the value of the
keyexists. Otherwise, add the
key-valuepair to the cache. If the number of keys exceeds the
capacityfrom this operation, evict the least recently used key.
put must each run in
O(1) average time complexity.