g0801_0900.s0881_boats_to_save_people

Class Solution

java.lang.Object

g0801_0900.s0881_boats_to_save_people.Solution

public class Solution
extends Object

881 - Boats to Save People.

Medium

You are given an array people where people[i] is the weight of the ith person, and an infinite number of boats where each boat can carry a maximum weight of limit. Each boat carries at most two people at the same time, provided the sum of the weight of those people is at most limit.

Return the minimum number of boats to carry every given person.

Example 1:

Input: people = [1,2], limit = 3

Output: 1

Explanation: 1 boat (1, 2)

Example 2:

Input: people = [3,2,2,1], limit = 3

Output: 3

Explanation: 3 boats (1, 2), (2) and (3)

Example 3:

Input: people = [3,5,3,4], limit = 5

Output: 4

Explanation: 4 boats (3), (3), (4), (5)

Constraints:

• 1 <= people.length <= 5 * 104
• 1 <= people[i] <= limit <= 3 * 104

Constructor Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and Description
int	numRescueBoats(int[] people, int limit)

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

numRescueBoats

public int numRescueBoats(int[] people,
                          int limit)