I make 3D lcs in javascript

lcs in javascript.

var crypto = require(`crypto`);
// var a = crypto.randomBytes(20).toString(`hex`);
// var b = crypto.randomBytes(20).toString(`hex`);
// var c = crypto.randomBytes(20).toString(`hex`);

var a = `acc3be0ffe08a5a37546ff6f31c8eab2ce11bd7e`;
var b = `0ded06494ff6017e86257f15f12db11e09ec2664`;
var c = `630fea9f3c2d173718a53d5488f3b53b22e35f88`;

const abc = Array.from({length: a.length + 1}, () =>
  Array.from({length: b.length + 1}, () =>
    Array(c.length + 1).fill(0),
  ),
);

for (let ai = 0; ai < a.length; ai++) {
  for (let bi = 0; bi < b.length; bi++) {
    for (let ci = 0; ci < c.length; ci++) {
      if (a[ai] == b[bi] && b[bi] == c[ci]) {
        abc[ai + 1][bi + 1][ci + 1] = abc[ai][bi][ci] + 1;
      } else {
        abc[ai + 1][bi + 1][ci + 1] = Math.max(
          abc[ai + 1][bi][ci],
          abc[ai][bi + 1][ci],
          abc[ai][bi][ci + 1],
          abc[ai + 1][bi + 1][ci],
          abc[ai][bi + 1][ci + 1],
          abc[ai + 1][bi][ci + 1],
        );
      }
    }
  }
}

let finalStr = ``;

let l = abc[a.length][b.length][c.length];

// console.log(abc);

let target = l - 1;

let temp = 0;
let ai = a.length;
let bi = b.length;
let ci = c.length;

for (let i = 0; i < l; i++) {
  /* eslint-disable no-empty */
  const curr = abc[ai][bi][ci];
  for (;abc[ai - 1][bi][ci] === curr; ai--) {}
  for (;abc[ai][bi - 1][ci] === curr; bi--) {}
  for (;abc[ai][bi][ci - 1] === curr; ci--) {}
  if (abc[ai - 1][bi - 1][ci - 1] === target) {
    target--;
    finalStr += a[ai - 1];
    ai--;
    bi--;
    ci--;
  }
}

console.log(a);
console.log(b);
console.log(c);
console.log(`Longest (${l}) = `, Array.from(finalStr).reverse().join(``));