Solve 2020/01

2020/01/input

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+1757
+1890
+1750
+1440
+1822
+1957
+2005
+1979
+1405
+2003
+1997
+1741
+1494
+1780
+1774
+1813
+447
+1429
+1990
+1767
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+1787
+1944
+1863
+1778
+2004
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+1754
+1748
+1756
+1977
+611
+1934
+1818
+1924
+528
+1753
+1867
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+1799
+1743
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+1972
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+1960
+1817
+1837
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+1839
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+1786
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+1985
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+1801
+1926
+1523
+1886
+1492
+1737
+1909
+1766
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+1773
+1749
+1781
+1760
+1849
+1833
+1854
+1814
+1820
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+1834
+1851
+1779
+1825
+1885
+1882
+1912
+962
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+302
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+1751
+1764
+1844
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+1933
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+714
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+1824
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+1906
+1735
+1876
+873
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+1917
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+1789
+1782
+1848
+1828
+1826
+1929
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+1928
+1856
+1903
+1871
+1836
+1847
+1956
+1915
+1870
+1875
+1892
+276
+1896
+1945
+1821
+1947
+1898
+1802
+1853
+1895
+1790
+1819
+1980
+1832
+1673
+1964
+1800
+1971
+1842
+2002
+1921
+1940
+1845
+1527
+1428
+1932
+1893
+1908
+1889
+1974
+1981
+1791
+1975

2020/01/solution1.js

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+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();