const fs = require("fs");

const filename = "input";

async function main() {
  const file = await fs.promises.readFile(filename, "utf-8");
  const expenses = file.split("\n").map((num) => parseInt(num));
  console.log(expenses);

  for (let i = 0; i < expenses.length; i++) {
    const a = expenses[i];
    const counterpart = 2020 - a;
    for (let j = 0; j < expenses.length; j++) {
      const b = expenses[j];
      for (let k = 0; k < expenses.length; k++) {
        const c = expenses[k];
        if (a + b + c === 2020) {
          console.log(a, b, c, a * b * c);
        }
      }
    }
  }
}

main();