Function buildGraph

javascript/0261-graph-valid-tree.js:24–33

(n, edges)

});

var buildGraph = (n, edges) => {
    const { graph, visited } = initGraph(n);

    for (const [src, dst] of edges) {
        graph[src].push(dst);
        graph[dst].push(src);
    }

    return { graph, visited };
};

const dfs = (node, graph, visited) => {
    if (visited.has(node)) return;