JavaScript DFS Clean Solution

  • 0
    var hasPathSum = function(root, sum) {
        if(!root) return false;
        var result = false;
        function add(root, amount){
            amount += root.val;
            if(!root.left && !root.right){
                if(amount === sum) result = true;
            if(root.left) add(root.left, amount);
            if(root.right) add(root.right, amount);
        add(root, 0);
        return result;

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