meetforever/GRPO_CL huggingface dataset:
user: Given an array A of integers, return the length of the longest arithmetic subsequence in A.
Recall that a subsequence of A is a list A[i_1], A[i_2], ..., A[i_k] with 0 <= i_1 < i_2 < ... < i_k <= A.length - 1, and that a sequence B is arithmetic if B[i+1] - B[i] are all the same value (for 0 <= i < B.length - 1).
 
Example 1:
Input: A = [3,6,9,12]
Output: 4
Explanation: 
The whole array is an arithmetic sequence with steps of length = 3.

Example 2:
Input: A = [9,4,7,2,10]
Output: 3
Explanation: 
The longest arithmetic subsequence is [4,7,10].

Example 3:
Input: A = [20,1,15,3,10,5,8]
Output: 4
Explanation: 
The longest arithmetic subsequence is [20,15,10,5].

 
Constraints:

2 <= A.length <= 1000
0 <= A[i] <= 500

Answer: {"fn_name": "longestArithSeqLength", "inputs": [[[3, 6, 9, 12]]], "outputs": [4]}
user: Given a non-negative integer N, find the largest number that is less than or equal to N with monotone increasing digits.

(Recall that an integer has monotone increasing digits if and only if each pair of adjacent digits x and y satisfy x .)


Example 1:

Input: N = 10
Output: 9



Example 2:

Input: N = 1234
Output: 1234



Example 3:

Input: N = 332
Output: 299



Note:
N is an integer in the range [0, 10^9].

Answer: {"fn_name": "monotoneIncreasingDigits", "inputs": [[10]], "outputs": [9]}
user: There are N children standing in a line. Each child is assigned a rating value.

You are giving candies to these children subjected to the following requirements:


       Each child must have at least one candy.
       Children with a higher rating get more candies than their neighbors.


What is the minimum candies you must give?

Example 1:


Input: [1,0,2]
Output: 5
Explanation: You can allocate to the first, second and third child with 2, 1, 2 candies respectively.


Example 2:


Input: [1,2,2]
Output: 4
Explanation: You can allocate to the first, second and third child with 1, 2, 1 candies respectively.
             The third child gets 1 candy because it satisfies the above two conditions.

Answer: {"fn_name": "candy", "inputs": [[[1, 0, 2]]], "outputs": [5]}
user: Return the length of the shortest, non-empty, contiguous subarray of A with sum at least K.
If there is no non-empty subarray with sum at least K, return -1.
 



Example 1:
Input: A = [1], K = 1
Output: 1


Example 2:
Input: A = [1,2], K = 4
Output: -1


Example 3:
Input: A = [2,-1,2], K = 3
Output: 3

 
Note:

1 <= A.length <= 50000
-10 ^ 5 <= A[i] <= 10 ^ 5
1 <= K <= 10 ^ 9

Answer: {"fn_name": "shortestSubarray", "inputs": [[[1], 1]], "outputs": [1]}
user: Given an integer array bloomDay, an integer m and an integer k.
We need to make m bouquets. To make a bouquet, you need to use k adjacent flowers from the garden.
The garden consists of n flowers, the ith flower will bloom in the bloomDay[i] and then can be used in exactly one bouquet.
Return the minimum number of days you need to wait to be able to make m bouquets from the garden. If it is impossible to make m bouquets return -1.
 
Example 1:
Input: bloomDay = [1,10,3,10,2], m = 3, k = 1
Output: 3
Explanation: Let's see what happened in the first three days. x means flower bloomed and _ means flower didn't bloom in the garden.
We need 3 bouquets each should contain 1 flower.
After day 1: [x, _, _, _, _]   // we can only make one bouquet.
After day 2: [x, _, _, _, x]   // we can only make two bouquets.
After day 3: [x, _, x, _, x]   // we can make 3 bouquets. The answer is 3.

Example 2:
Input: bloomDay = [1,10,3,10,2], m = 3, k = 2
Output: -1
Explanation: We need 3 bouquets each has 2 flowers, that means we need 6 flowers. We only have 5 flowers so it is impossible to get the needed bouquets and we return -1.

Example 3:
Input: bloomDay = [7,7,7,7,12,7,7], m = 2, k = 3
Output: 12
Explanation: We need 2 bouquets each should have 3 flowers.
Here's the garden after the 7 and 12 days:
After day 7: [x, x, x, x, _, x, x]
We can make one bouquet of the first three flowers that bloomed. We cannot make another bouquet from the last three flowers that bloomed because they are not adjacent.
After day 12: [x, x, x, x, x, x, x]
It is obvious that we can make two bouquets in different ways.

Example 4:
Input: bloomDay = [1000000000,1000000000], m = 1, k = 1
Output: 1000000000
Explanation: You need to wait 1000000000 days to have a flower ready for a bouquet.

Example 5:
Input: bloomDay = [1,10,2,9,3,8,4,7,5,6], m = 4, k = 2
Output: 9

 
Constraints:

bloomDay.length == n
1 <= n <= 10^5
1 <= bloomDay[i] <= 10^9
1 <= m <= 10^6
1 <= k <= n

Answer: {"fn_name": "minDays", "inputs": [[[1, 10, 3, 10, 2], 3, 1]], "outputs": [3]}
user: Given a binary string s (a string consisting only of '0' and '1's).
Return the number of substrings with all characters 1's.
Since the answer may be too large, return it modulo 10^9 + 7.
 
Example 1:
Input: s = "0110111"
Output: 9
Explanation: There are 9 substring in total with only 1's characters.
"1" -> 5 times.
"11" -> 3 times.
"111" -> 1 time.
Example 2:
Input: s = "101"
Output: 2
Explanation: Substring "1" is shown 2 times in s.

Example 3:
Input: s = "111111"
Output: 21
Explanation: Each substring contains only 1's characters.

Example 4:
Input: s = "000"
Output: 0

 
Constraints:

s[i] == '0' or s[i] == '1'
1 <= s.length <= 10^5

Answer: {"fn_name": "numSub", "inputs": [["\"0110111\""]], "outputs": [9]}
user: You are given two strings s1 and s2 of equal length consisting of letters "x" and "y" only. Your task is to make these two strings equal to each other. You can swap any two characters that belong to different strings, which means: swap s1[i] and s2[j].
Return the minimum number of swaps required to make s1 and s2 equal, or return -1 if it is impossible to do so.
 
Example 1:
Input: s1 = "xx", s2 = "yy"
Output: 1
Explanation: 
Swap s1[0] and s2[1], s1 = "yx", s2 = "yx".
Example 2: 
Input: s1 = "xy", s2 = "yx"
Output: 2
Explanation: 
Swap s1[0] and s2[0], s1 = "yy", s2 = "xx".
Swap s1[0] and s2[1], s1 = "xy", s2 = "xy".
Note that you can't swap s1[0] and s1[1] to make s1 equal to "yx", cause we can only swap chars in different strings.
Example 3:
Input: s1 = "xx", s2 = "xy"
Output: -1

Example 4:
Input: s1 = "xxyyxyxyxx", s2 = "xyyxyxxxyx"
Output: 4

 
Constraints:

1 <= s1.length, s2.length <= 1000
s1, s2 only contain 'x' or 'y'.

Answer: {"fn_name": "minimumSwap", "inputs": [["\"xx\"", "\"yy\""]], "outputs": [1]}
user: A string is called a happy prefix if is a non-empty prefix which is also a suffix (excluding itself).
Given a string s. Return the longest happy prefix of s .
Return an empty string if no such prefix exists.
 
Example 1:
Input: s = "level"
Output: "l"
Explanation: s contains 4 prefix excluding itself ("l", "le", "lev", "leve"), and suffix ("l", "el", "vel", "evel"). The largest prefix which is also suffix is given by "l".

Example 2:
Input: s = "ababab"
Output: "abab"
Explanation: "abab" is the largest prefix which is also suffix. They can overlap in the original string.

Example 3:
Input: s = "leetcodeleet"
Output: "leet"

Example 4:
Input: s = "a"
Output: ""

 
Constraints:

1 <= s.length <= 10^5
s contains only lowercase English letters.

Answer: {"fn_name": "longestPrefix", "inputs": [["\"level\""]], "outputs": ["\""]}
user: We are given S, a length n string of characters from the set {'D', 'I'}. (These letters stand for "decreasing" and "increasing".)
A valid permutation is a permutation P[0], P[1], ..., P[n] of integers {0, 1, ..., n}, such that for all i:

If S[i] == 'D', then P[i] > P[i+1], and;
If S[i] == 'I', then P[i] < P[i+1].

How many valid permutations are there?  Since the answer may be large, return your answer modulo 10^9 + 7.
 
Example 1:
Input: "DID"
Output: 5
Explanation: 
The 5 valid permutations of (0, 1, 2, 3) are:
(1, 0, 3, 2)
(2, 0, 3, 1)
(2, 1, 3, 0)
(3, 0, 2, 1)
(3, 1, 2, 0)

 
Note:

1 <= S.length <= 200
S consists only of characters from the set {'D', 'I'}.

Answer: {"fn_name": "numPermsDISequence", "inputs": [["\"DID\""]], "outputs": [61]}
user: There is a pizza with 3n slices of varying size, you and your friends will take slices of pizza as follows:

You will pick any pizza slice.
Your friend Alice will pick next slice in anti clockwise direction of your pick. 
Your friend Bob will pick next slice in clockwise direction of your pick.
Repeat until there are no more slices of pizzas.

Sizes of Pizza slices is represented by circular array slices in clockwise direction.
Return the maximum possible sum of slice sizes which you can have.
 
Example 1:

Input: slices = [1,2,3,4,5,6]
Output: 10
Explanation: Pick pizza slice of size 4, Alice and Bob will pick slices with size 3 and 5 respectively. Then Pick slices with size 6, finally Alice and Bob will pick slice of size 2 and 1 respectively. Total = 4 + 6.

Example 2:

Input: slices = [8,9,8,6,1,1]
Output: 16
Output: Pick pizza slice of size 8 in each turn. If you pick slice with size 9 your partners will pick slices of size 8.

Example 3:
Input: slices = [4,1,2,5,8,3,1,9,7]
Output: 21

Example 4:
Input: slices = [3,1,2]
Output: 3

 
Constraints:

1 <= slices.length <= 500
slices.length % 3 == 0
1 <= slices[i] <= 1000

Answer: {"fn_name": "maxSizeSlices", "inputs": [[[1, 2, 3, 4, 5, 6]]], "outputs": [10]}
user: Alice and Bob continue their games with piles of stones. There are several stones arranged in a row, and each stone has an associated value which is an integer given in the array stoneValue.
Alice and Bob take turns, with Alice starting first. On each player's turn, that player can take 1, 2 or 3 stones from the first remaining stones in the row.
The score of each player is the sum of values of the stones taken. The score of each player is 0 initially.
The objective of the game is to end with the highest score, and the winner is the player with the highest score and there could be a tie. The game continues until all the stones have been taken.
Assume Alice and Bob play optimally.
Return "Alice" if Alice will win, "Bob" if Bob will win or "Tie" if they end the game with the same score.
 
Example 1:
Input: values = [1,2,3,7]
Output: "Bob"
Explanation: Alice will always lose. Her best move will be to take three piles and the score become 6. Now the score of Bob is 7 and Bob wins.

Example 2:
Input: values = [1,2,3,-9]
Output: "Alice"
Explanation: Alice must choose all the three piles at the first move to win and leave Bob with negative score.
If Alice chooses one pile her score will be 1 and the next move Bob's score becomes 5. The next move Alice will take the pile with value = -9 and lose.
If Alice chooses two piles her score will be 3 and the next move Bob's score becomes 3. The next move Alice will take the pile with value = -9 and also lose.
Remember that both play optimally so here Alice will choose the scenario that makes her win.

Example 3:
Input: values = [1,2,3,6]
Output: "Tie"
Explanation: Alice cannot win this game. She can end the game in a draw if she decided to choose all the first three piles, otherwise she will lose.

Example 4:
Input: values = [1,2,3,-1,-2,-3,7]
Output: "Alice"

Example 5:
Input: values = [-1,-2,-3]
Output: "Tie"

 
Constraints:

1 <= values.length <= 50000
-1000 <= values[i] <= 1000

Answer: {"fn_name": "stoneGameIII", "inputs": [[[1, 2, 3, 7]]], "outputs": ["Bob"]}
user: Your task is to form an integer array nums from an initial array of zeros arr that is the same size as nums.
Return the minimum number of function calls to make nums from arr.
The answer is guaranteed to fit in a 32-bit signed integer.
 
Example 1:
Input: nums = [1,5]
Output: 5
Explanation: Increment by 1 (second element): [0, 0] to get [0, 1] (1 operation).
Double all the elements: [0, 1] -> [0, 2] -> [0, 4] (2 operations).
Increment by 1 (both elements)  [0, 4] -> [1, 4] -> [1, 5] (2 operations).
Total of operations: 1 + 2 + 2 = 5.

Example 2:
Input: nums = [2,2]
Output: 3
Explanation: Increment by 1 (both elements) [0, 0] -> [0, 1] -> [1, 1] (2 operations).
Double all the elements: [1, 1] -> [2, 2] (1 operation).
Total of operations: 2 + 1 = 3.

Example 3:
Input: nums = [4,2,5]
Output: 6
Explanation: (initial)[0,0,0] -> [1,0,0] -> [1,0,1] -> [2,0,2] -> [2,1,2] -> [4,2,4] -> [4,2,5](nums).

Example 4:
Input: nums = [3,2,2,4]
Output: 7

Example 5:
Input: nums = [2,4,8,16]
Output: 8

 
Constraints:

1 <= nums.length <= 10^5
0 <= nums[i] <= 10^9

Answer: {"fn_name": "minOperations", "inputs": [[[1, 5]]], "outputs": [5]}
user: Given two strings: s1 and s2 with the same size, check if some permutation of string s1 can break some permutation of string s2 or vice-versa (in other words s2 can break s1).
A string x can break string y (both of size n) if x[i] >= y[i] (in alphabetical order) for all i between 0 and n-1.
 
Example 1:
Input: s1 = "abc", s2 = "xya"
Output: true
Explanation: "ayx" is a permutation of s2="xya" which can break to string "abc" which is a permutation of s1="abc".

Example 2:
Input: s1 = "abe", s2 = "acd"
Output: false 
Explanation: All permutations for s1="abe" are: "abe", "aeb", "bae", "bea", "eab" and "eba" and all permutation for s2="acd" are: "acd", "adc", "cad", "cda", "dac" and "dca". However, there is not any permutation from s1 which can break some permutation from s2 and vice-versa.

Example 3:
Input: s1 = "leetcodee", s2 = "interview"
Output: true

 
Constraints:

s1.length == n
s2.length == n
1 <= n <= 10^5
All strings consist of lowercase English letters.

Answer: {"fn_name": "checkIfCanBreak", "inputs": [["\"abc\"", "\"xya\""]], "outputs": [true]}
user: Given a sorted positive integer array nums and an integer n, add/patch elements to the array such that any number in range [1, n] inclusive can be formed by the sum of some elements in the array. Return the minimum number of patches required.

Example 1:


Input: nums = [1,3], n = 6
Output: 1 
Explanation:
Combinations of nums are [1], [3], [1,3], which form possible sums of: 1, 3, 4.
Now if we add/patch 2 to nums, the combinations are: [1], [2], [3], [1,3], [2,3], [1,2,3].
Possible sums are 1, 2, 3, 4, 5, 6, which now covers the range [1, 6].
So we only need 1 patch.

Example 2:


Input: nums = [1,5,10], n = 20
Output: 2
Explanation: The two patches can be [2, 4].


Example 3:


Input: nums = [1,2,2], n = 5
Output: 0

Answer: {"fn_name": "minPatches", "inputs": [[[1, 3], 6]], "outputs": [1]}
user: Given s1, s2, s3, find whether s3 is formed by the interleaving of s1 and s2.

Example 1:


Input: s1 = "aabcc", s2 = "dbbca", s3 = "aadbbcbcac"
Output: true


Example 2:


Input: s1 = "aabcc", s2 = "dbbca", s3 = "aadbbbaccc"
Output: false

Answer: {"fn_name": "isInterleave", "inputs": [["\"aabcc\"", "\"dbbca\"", "\"aadbbcbcac\""]], "outputs": [false]}
user: Given a positive 32-bit integer n, you need to find the smallest 32-bit integer which has exactly the same digits existing in the integer n and is greater in value than n. If no such positive 32-bit integer exists, you need to return -1.

Example 1:


Input: 12
Output: 21


 

Example 2:


Input: 21
Output: -1

Answer: {"fn_name": "nextGreaterElement", "inputs": [[12]], "outputs": [21]}
user: Given an N x N grid containing only values 0 and 1, where 0 represents water and 1 represents land, find a water cell such that its distance to the nearest land cell is maximized and return the distance.
The distance used in this problem is the Manhattan distance: the distance between two cells (x0, y0) and (x1, y1) is |x0 - x1| + |y0 - y1|.
If no land or water exists in the grid, return -1.
 
Example 1:

Input: [[1,0,1],[0,0,0],[1,0,1]]
Output: 2
Explanation: 
The cell (1, 1) is as far as possible from all the land with distance 2.

Example 2:

Input: [[1,0,0],[0,0,0],[0,0,0]]
Output: 4
Explanation: 
The cell (2, 2) is as far as possible from all the land with distance 4.

 
Note:

1 <= grid.length == grid[0].length <= 100
grid[i][j] is 0 or 1

Answer: {"fn_name": "maxDistance", "inputs": [[[[1, 0, 1], [0, 0, 0], [1, 0, 1], [], []]]], "outputs": [3]}
user: The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility)


P   A   H   N
A P L S I I G
Y   I   R


And then read line by line: "PAHNAPLSIIGYIR"

Write the code that will take a string and make this conversion given a number of rows:


string convert(string s, int numRows);

Example 1:


Input: s = "PAYPALISHIRING", numRows = 3
Output: "PAHNAPLSIIGYIR"


Example 2:


Input: s = "PAYPALISHIRING", numRows = 4
Output: "PINALSIGYAHRPI"
Explanation:

P     I    N
A   L S  I G
Y A   H R
P     I

Answer: {"fn_name": "convert", "inputs": [["\"PAYPALISHIRING\"", 3]], "outputs": ["\"PSIPYAIHRN\"ALIG"]}
user: Given a string, find the length of the longest substring without repeating characters.

Examples:

Given "abcabcbb", the answer is "abc", which the length is 3.

Given "bbbbb", the answer is "b", with the length of 1.

Given "pwwkew", the answer is "wke", with the length of 3. Note that the answer must be a substring, "pwke" is a subsequence and not a substring.

Answer: {"fn_name": "lengthOfLongestSubstring", "inputs": [["\"abcabcbb\""]], "outputs": [4]}
user: Given a sequence of n integers a1, a2, ..., an, a 132 pattern is a subsequence ai, aj, ak such
that i < j < k and ai < ak < aj. Design an algorithm that takes a list of n numbers as input and checks whether there is a 132 pattern in the list.

Note: n will be less than 15,000.

Example 1:

Input: [1, 2, 3, 4]

Output: False

Explanation: There is no 132 pattern in the sequence.



Example 2:

Input: [3, 1, 4, 2]

Output: True

Explanation: There is a 132 pattern in the sequence: [1, 4, 2].



Example 3:

Input: [-1, 3, 2, 0]

Output: True

Explanation: There are three 132 patterns in the sequence: [-1, 3, 2], [-1, 3, 0] and [-1, 2, 0].

Answer: {"fn_name": "find132pattern", "inputs": [[[1, 2, 3, 4]]], "outputs": [false]}
user: You are given a rows x cols matrix grid. Initially, you are located at the top-left corner (0, 0), and in each step, you can only move right or down in the matrix.
Among all possible paths starting from the top-left corner (0, 0) and ending in the bottom-right corner (rows - 1, cols - 1), find the path with the maximum non-negative product. The product of a path is the product of all integers in the grid cells visited along the path.
Return the maximum non-negative product modulo 109 + 7. If the maximum product is negative return -1.
Notice that the modulo is performed after getting the maximum product.
 
Example 1:
Input: grid = [[-1,-2,-3],
               [-2,-3,-3],
               [-3,-3,-2]]
Output: -1
Explanation: It's not possible to get non-negative product in the path from (0, 0) to (2, 2), so return -1.

Example 2:
Input: grid = [[1,-2,1],
               [1,-2,1],
               [3,-4,1]]
Output: 8
Explanation: Maximum non-negative product is in bold (1 * 1 * -2 * -4 * 1 = 8).

Example 3:
Input: grid = [[1, 3],
               [0,-4]]
Output: 0
Explanation: Maximum non-negative product is in bold (1 * 0 * -4 = 0).

Example 4:
Input: grid = [[ 1, 4,4,0],
               [-2, 0,0,1],
               [ 1,-1,1,1]]
Output: 2
Explanation: Maximum non-negative product is in bold (1 * -2 * 1 * -1 * 1 * 1 = 2).

 
Constraints:

1 <= rows, cols <= 15
-4 <= grid[i][j] <= 4

Answer: {"fn_name": "maxProductPath", "inputs": [[[[-1, -2, -3], [-2, -3, -3], [-3, -3, -2], [], []]]], "outputs": [-1]}
user: Validate if a given string is numeric.

Some examples:
"0" => true
" 0.1 " => true
"abc" => false
"1 a" => false
"2e10" => true

Note: It is intended for the problem statement to be ambiguous. You should gather all requirements up front before implementing one.

Update (2015-02-10):
The signature of the C++ function had been updated. If you still see your function signature accepts a const char * argument, please click the reload button to reset your code definition.

Answer: {"fn_name": "isNumber", "inputs": [["\"0\""]], "outputs": [false]}
user: Given two numbers, hour and minutes. Return the smaller angle (in degrees) formed between the hour and the minute hand.
 
Example 1:

Input: hour = 12, minutes = 30
Output: 165

Example 2:

Input: hour = 3, minutes = 30
Output: 75

Example 3:

Input: hour = 3, minutes = 15
Output: 7.5

Example 4:
Input: hour = 4, minutes = 50
Output: 155

Example 5:
Input: hour = 12, minutes = 0
Output: 0

 
Constraints:

1 <= hour <= 12
0 <= minutes <= 59
Answers within 10^-5 of the actual value will be accepted as correct.

Answer: {"fn_name": "angleClock", "inputs": [[12, 30]], "outputs": [165.0]}
user: Given a string, your task is to count how many palindromic substrings in this string.



The substrings with different start indexes or end indexes are counted as different substrings even they consist of same characters. 


Example 1:

Input: "abc"
Output: 3
Explanation: Three palindromic strings: "a", "b", "c".



Example 2:

Input: "aaa"
Output: 6
Explanation: Six palindromic strings: "a", "a", "a", "aa", "aa", "aaa".



Note:

The input string length won't exceed 1000.

Answer: {"fn_name": "countSubstrings", "inputs": [["\"abc\""]], "outputs": [5]}
user: Given an array of integers arr, you are initially positioned at the first index of the array.
In one step you can jump from index i to index:

i + 1 where: i + 1 < arr.length.
i - 1 where: i - 1 >= 0.
j where: arr[i] == arr[j] and i != j.

Return the minimum number of steps to reach the last index of the array.
Notice that you can not jump outside of the array at any time.
 
Example 1:
Input: arr = [100,-23,-23,404,100,23,23,23,3,404]
Output: 3
Explanation: You need three jumps from index 0 --> 4 --> 3 --> 9. Note that index 9 is the last index of the array.

Example 2:
Input: arr = [7]
Output: 0
Explanation: Start index is the last index. You don't need to jump.

Example 3:
Input: arr = [7,6,9,6,9,6,9,7]
Output: 1
Explanation: You can jump directly from index 0 to index 7 which is last index of the array.

Example 4:
Input: arr = [6,1,9]
Output: 2

Example 5:
Input: arr = [11,22,7,7,7,7,7,7,7,22,13]
Output: 3

 
Constraints:

1 <= arr.length <= 5 * 10^4
-10^8 <= arr[i] <= 10^8

Answer: {"fn_name": "minJumps", "inputs": [[[100, -23, -23, 404, 100, 23, 23, 23, 3, 404]]], "outputs": [3]}
user: Given a string s and an array of integers cost where cost[i] is the cost of deleting the ith character in s.
Return the minimum cost of deletions such that there are no two identical letters next to each other.
Notice that you will delete the chosen characters at the same time, in other words, after deleting a character, the costs of deleting other characters will not change.
 
Example 1:
Input: s = "abaac", cost = [1,2,3,4,5]
Output: 3
Explanation: Delete the letter "a" with cost 3 to get "abac" (String without two identical letters next to each other).

Example 2:
Input: s = "abc", cost = [1,2,3]
Output: 0
Explanation: You don't need to delete any character because there are no identical letters next to each other.

Example 3:
Input: s = "aabaa", cost = [1,2,3,4,1]
Output: 2
Explanation: Delete the first and the last character, getting the string ("aba").

 
Constraints:

s.length == cost.length
1 <= s.length, cost.length <= 10^5
1 <= cost[i] <= 10^4
s contains only lowercase English letters.

Answer: {"fn_name": "minCost", "inputs": [["\"abaac\"", [1, 2, 3, 4, 5]]], "outputs": [4]}
user: You are installing a billboard and want it to have the largest height.  The billboard will have two steel supports, one on each side.  Each steel support must be an equal height.
You have a collection of rods which can be welded together.  For example, if you have rods of lengths 1, 2, and 3, you can weld them together to make a support of length 6.
Return the largest possible height of your billboard installation.  If you cannot support the billboard, return 0.
 
Example 1:
Input: [1,2,3,6]
Output: 6
Explanation: We have two disjoint subsets {1,2,3} and {6}, which have the same sum = 6.


Example 2:
Input: [1,2,3,4,5,6]
Output: 10
Explanation: We have two disjoint subsets {2,3,5} and {4,6}, which have the same sum = 10.



Example 3:
Input: [1,2]
Output: 0
Explanation: The billboard cannot be supported, so we return 0.


 
Note:

0 <= rods.length <= 20
1 <= rods[i] <= 1000
The sum of rods is at most 5000.

Answer: {"fn_name": "tallestBillboard", "inputs": [[[1, 2, 3, 6]]], "outputs": [6]}