advent_of_code_day1.java

package com.company;

import java.util.*;

public class Bani {
    public static void main(String[] args) {

        var input = List.of(1891,
                1975,
                1987,
                1923,
                1928,
                1993,
                1946,
                1947,
                2005,
                1897,
                1971,
                1929,
                1875,
                1945,
                1680,
                811,
                1901,
                1396,
                1942,
                1282,
                1941,
                1978,
                1884,
                1879,
                1230,
                2010,
                1881,
                1979,
                1996,
                1904,
                1934,
                1865,
                2003,
                2006,
                1966,
                1860,
                1259,
                1959,
                1931,
                1963,
                1878,
                1880,
                151,
                1925,
                1663,
                1908,
                1863,
                1391,
                1922,
                1968,
                1998,
                1084,
                1982,
                1960,
                1938,
                1876,
                1937,
                1882,
                1873,
                1926,
                1986,
                1416,
                1864,
                1862,
                1969,
                1913,
                532,
                1866,
                1242,
                1933,
                1903,
                965,
                1927,
                1890,
                1991,
                1388,
                1992,
                1902,
                1907,
                1964,
                1394,
                2009,
                1920,
                630,
                1932,
                1854,
                1951,
                1852,
                1983,
                1314,
                1855,
                1954,
                1921,
                1989,
                1871,
                1995,
                1885,
                1974,
                1915,
                1872,
                1251,
                1899,
                1985,
                1889,
                1935,
                1912,
                946,
                1965,
                1739,
                1973,
                1911,
                1910,
                1917,
                1918,
                1900,
                1886,
                1477,
                2000,
                1916,
                1077,
                2004,
                1456,
                1867,
                1970,
                1999,
                1919,
                1726,
                706,
                1930,
                1994,
                1988,
                1997,
                1870,
                1953,
                652,
                1893,
                1898,
                1883,
                1957,
                1972,
                1874,
                1977,
                1955,
                2001,
                1906,
                1389,
                1848,
                1940,
                1877,
                1962,
                1948,
                1887,
                1924,
                1403,
                1408,
                1861,
                1892,
                1990,
                1222,
                677,
                1392,
                1113,
                1085,
                1894,
                1106,
                1939,
                1961,
                1944,
                1952,
                1643,
                1404,
                1895,
                1958,
                1976,
                1206,
                1905,
                1076,
                1888,
                1896,
                1943,
                1950,
                2008,
                1967,
                164,
                1981,
                1868,
                1914,
                1909,
                1956,
                341,
                1379,
                2007,
                1563,
                1980,
                1072,
                1949,
                1250,
                1258,
                1092,
                2002);
        for (int i = 0; i < input.size(); i++) {
            for (int j = i + 1; j < input.size(); j++) {
                if (input.get(i) + input.get(j) == 2020) {
                    var message = """
                            Number that sums up to 2020 are: %d %d
                            Their product is  %d
                            """.formatted(input.get(i), input.get(j), input.get(i) * input.get(j));
                    System.out.println(message);

                }
            }
        }
    }
}