Leetcode - 135. Candy

/**
 * @param {number[]} ratings
 * @return {number}
 */
var candy = function(ratings) {

    const candies =  new Array(ratings.length).fill(1);

    for(let i = 1 ; i < ratings.length  ;i++){
        if(ratings[i] > ratings[i-1]){
            candies[i] = candies[i-1] + 1
        }
    }
    for(let i = ratings.length-1 ; i >= 0 ;i--){
        if(ratings[i] >ratings[i+1] && candies[i] <= candies[i+1]){
            candies[i] = candies[i+1] + 1
        }
    }
    return candies.reduce((sum,candy)=> sum+candy , 0 )
};