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339.NestedListWeightSum.js
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48 lines (44 loc) · 1.27 KB
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/**
* // This is the interface that allows for creating nested lists.
* // You should not implement it, or speculate about its implementation
* function NestedInteger() {
*
* Return true if this NestedInteger holds a single integer, rather than a nested list.
* @return {boolean}
* this.isInteger = function() {
* ...
* };
*
* Return the single integer that this NestedInteger holds, if it holds a single integer
* Return null if this NestedInteger holds a nested list
* @return {integer}
* this.getInteger = function() {
* ...
* };
*
* Return the nested list that this NestedInteger holds, if it holds a nested list
* Return null if this NestedInteger holds a single integer
* @return {NestedInteger[]}
* this.getList = function() {
* ...
* };
* };
*/
/**
* @param {NestedInteger[]} nestedList
* @return {number}
*/
var depthSum = function(nestedList) {
return helper(nestedList, 1);
};
var helper = function(list, depth)
{
let sum = 0;
let ll = list.length;
for (let i=0; i<ll; i=i+1)
{
if (list[i].isInteger() === true) { sum = sum + depth*list[i].getInteger(); }
else { sum = sum + helper(list[i].getList(), (depth+1)); }
}
return sum;
}