Leetcode 135 Solution

This article provides solution to leetcode question 135 (candy)
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https://leetcode.com/problems/candy

Solution

class Solution {
public:
    int candy(vector<int>& ratings) {
        int n = ratings.size();
        int candies[n];
        candies[0] = 1;

        for (int i = 1; i < n; i++)
            if (ratings[i] > ratings[i - 1])
                candies[i] = candies[i - 1] + 1;
            else
                candies[i] = 1;

        for (int i = n - 2; i >= 0; i--)
            if (ratings[i] > ratings[i + 1])
                candies[i] = max(candies[i + 1] + 1, candies[i]);

        return accumulate(&candies[0], &candies[n], 0);
    }
};