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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:
What is the minimum candies you must give?
public class Solution { public int candy(int[] ratings) { int[] candies = new int[ratings.length]; Arrays.fill(candies, 1);//每人先发一个糖果 for (int i = 1; i < ratings.length; i++) { if (ratings[i] > ratings[i - 1]) { candies[i] = candies[i - 1] + 1;//从左向右遍历,确保相邻的两个孩子,如果右侧孩子比左侧孩子评分高,则右侧孩子的比左侧的孩子手中的果多一个 } } for (int i = ratings.length - 2; i >= 0; i--) { if (ratings[i] > ratings[i + 1]) { candies[i] = Math.max(candies[i], candies[i + 1] + 1);//从右向左遍历,确保相邻的两个孩子,如果左侧孩子比右侧孩子评分高,则左侧孩子应该 //保证比右侧评分低的孩子多一个糖果。 } } int sum = 0; for (int candy : candies) { sum += candy; } return sum; } }
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