1.js

const a = [
1825,
1944,
1802,
1676,
1921,
1652,
1710,
1952,
1932,
1934,
1823,
1732,
1795,
1681,
1706,
1697,
1919,
1695,
2007,
1889,
1942,
961,
1868,
1878,
1723,
416,
1875,
1831,
1890,
1654,
1956,
1827,
973,
1947,
1688,
1680,
1808,
1998,
1794,
1552,
1935,
1693,
1824,
1711,
1766,
1668,
1968,
1884,
217,
2003,
1869,
1658,
1953,
1829,
1984,
2005,
1973,
428,
1957,
1925,
1719,
1797,
321,
1804,
1971,
922,
1976,
1863,
2008,
1806,
1833,
1809,
1707,
1954,
1811,
1815,
1915,
1799,
1917,
1664,
1937,
1775,
1685,
1756,
1940,
1660,
1859,
1916,
1989,
1763,
1994,
1716,
1689,
1866,
1708,
1670,
1982,
1870,
1847,
1627,
1819,
1786,
1828,
1640,
1699,
1722,
1737,
1882,
1666,
1871,
1703,
1770,
1623,
1837,
1636,
1655,
1930,
1739,
1810,
1805,
1861,
1922,
1993,
1896,
1760,
2002,
1779,
1633,
1972,
1856,
1641,
1718,
2004,
1730,
1826,
1923,
1753,
1735,
660,
1988,
1796,
1990,
1720,
1626,
1788,
1700,
942,
1902,
1943,
1758,
1839,
1924,
938,
1634,
1724,
1983,
1683,
1687,
1904,
1907,
1757,
2001,
1910,
1849,
1781,
1981,
1743,
1851,
2009,
619,
1898,
1891,
1751,
1765,
1959,
1888,
1894,
1759,
389,
1964,
1900,
1742,
1672,
1969,
1978,
1933,
1906,
1807,
1867,
1838,
1960,
1814,
1950,
1918,
1726,
1986,
1746,
2006,
1949,
1784,
]

function findSum(to_find) {
  for (const n of a) {
    const complement = to_find - n
    if (a.includes(complement)) {
      return [n, complement]
    }
  }
}


for (const n of a) {
  const complement = 2020 - n
  const sum = findSum(complement)
  if (sum) {
    console.log(n, sum[0], sum[1], n + sum[0] + sum[1], n *  sum[0] * sum[1])
    return
  }
}