let graph;

​

const numOfNodes = 7;

let visited = new Array(numOfNodes);

​

const dfs = (node) => {

  const stack = [];

  stack.push(node);

​

  while (stack.length) {

    node = stack.pop();

​

    if (!visited[node]) {

      visited[node] = true;

​

      console.log(`visiting ${node}`);

      for (let j = 0; j < graph[node].length; j++) {

        if (graph[node][j] === 1) {

          stack.push(j);

        }

      }

    }

  }

};

​

// helper methods

​

const createGraph = (numOfNodes) => {

  graph = new Array(numOfNodes);