topo1

let toposort = require("toposort");

let graph = [ [3, 2], [4, 3], [4, 2], [5, 2], [5, 3], [5, 6], [6, 1], [7, 1], [7, 2], [8, 2], [8, 7], [9, 8], [10, 1], [10, 2], [10, 3], [10, 5], [10, 8], [10, 9], [11, 10], [11, 15], [12, 15], [13, 1], [13, 2], [13, 3], [13, 4], [13, 5], [13, 6], [13, 7], [13, 10], [14, 1], [14, 2], [14, 3], [14, 4], [15, 14], [15, 13], [16, 15], ]; toposort(graph);