test.js

acc = null;

savedPaths = [];

function dfs(node) {
  if (acc != null) {
    acc = acc + node.weight;
  }
  
  if (isLeaf(node)) {
    if (acc != null) {
      savedPaths.push(acc);
    }
    acc = 0;
  } else {
    for (child in node.children) {
      dfs(child);
    }
  }
  
  if (acc != null) {
    acc = acc + node.weight;
  }
}