aureooms/js-maximum-matching

import assert from 'assert';

export const statistics = (edges) => {
    const nedge = edges.length;
    let nvertex = 0;
    let maxweight = 0;

    let length = nedge;
    while (length--) {
        const i = edges[length][0];
        const j = edges[length][1];
        const w = edges[length][2];

        assert(i >= 0 && j >= 0 && i !== j);
        if (i >= nvertex) nvertex = i + 1;
        if (j >= nvertex) nvertex = j + 1;

        maxweight = Math.max(maxweight, w);
    }

    return [nvertex, nedge, maxweight];
};