g1001_1100.s1049_last_stone_weight_ii

Class Solution

java.lang.Object

g1001_1100.s1049_last_stone_weight_ii.Solution

public class Solution
extends Object

1049 - Last Stone Weight II.

Medium

You are given an array of integers stones where stones[i] is the weight of the ith stone.

We are playing a game with the stones. On each turn, we choose any two stones and smash them together. Suppose the stones have weights x and y with x <= y. The result of this smash is:

• If x == y, both stones are destroyed, and
• If x != y, the stone of weight x is destroyed, and the stone of weight y has new weight y - x.

At the end of the game, there is at most one stone left.

Return the smallest possible weight of the left stone. If there are no stones left, return 0.

Example 1:

Input: stones = [2,7,4,1,8,1]

Output: 1

Explanation:

We can combine 2 and 4 to get 2, so the array converts to [2,7,1,8,1] then,

we can combine 7 and 8 to get 1, so the array converts to [2,1,1,1] then,

we can combine 2 and 1 to get 1, so the array converts to [1,1,1] then,

we can combine 1 and 1 to get 0, so the array converts to [1], then that’s the optimal value.

Example 2:

Input: stones = [31,26,33,21,40]

Output: 5

Constraints:

• 1 <= stones.length <= 30
• 1 <= stones[i] <= 100

Constructor Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and Description
int	lastStoneWeightII(int[] stones)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Solution

public Solution()

Method Detail

lastStoneWeightII

public int lastStoneWeightII(int[] stones)