day1 solved

2020/day_1/input1

@@ -0,0 +1,200 @@
+2004
+1671
+1678
+1304
+1242
+1882
+1605
+1034
+1883
+1589
+1881
+1546
+1713
+1218
+1982
+1395
+1277
+1417
+1497
+1499
+1847
+1989
+1172
+1684
+1243
+1843
+1661
+1662
+1421
+1790
+1344
+1458
+1074
+1809
+1990
+1369
+1386
+1736
+1972
+1634
+1229
+1123
+1870
+1595
+1934
+1399
+1732
+1545
+1208
+368
+1907
+1143
+443
+1929
+1965
+1872
+1738
+1967
+997
+1473
+1041
+1991
+1868
+1180
+1409
+1379
+1568
+1163
+1869
+1391
+1956
+1249
+1505
+351
+2001
+462
+1219
+1731
+1802
+1798
+1626
+1438
+1099
+1477
+1980
+1708
+1666
+1066
+1121
+1359
+1426
+1734
+1768
+1836
+1453
+923
+1660
+1878
+1522
+1024
+1429
+232
+1952
+1730
+1763
+1981
+1388
+1337
+1317
+1922
+1044
+1999
+1341
+1178
+1524
+1185
+1257
+1256
+1061
+1262
+1022
+1778
+1917
+1205
+1272
+1842
+1533
+1194
+1746
+1691
+1617
+1667
+1940
+1171
+1792
+1773
+1411
+1902
+1859
+1978
+1764
+1482
+1276
+735
+1716
+1915
+1675
+1126
+1830
+1227
+1299
+1535
+1700
+1658
+1771
+1823
+1055
+1602
+1590
+1983
+1885
+1735
+103
+1766
+14
+1486
+1939
+1525
+1916
+1279
+544
+1406
+1674
+1948
+1971
+1651
+1715
+1943
+1784
+2008
+1800
+1720
+1557
+1467
+1371
+1637
+1345
+1924
+1565
+1976
+1827
+1890
+1848
+1465
+1573
+1231
+1310
+1754
+1569
+1532

2020/day_1/src/main.rs

@@ -1,3 +1,33 @@
+use std::io::Read;
 fn main() {
-    println!("Hello, world!");
+    let mut file = std::fs::File::open("input1").unwrap();
+    let mut contents = String::new();
+    file.read_to_string(&mut contents).unwrap();
+    let mut v: Vec<i32> = Vec::new();
+    for s in contents.lines() {
+        v.push(s.parse::<i32>().unwrap());
+    }
+    v.sort();
+    let v2 = v.to_vec();
+    for n in v.iter() {
+        for n2 in v2.iter() {
+            let val = n + n2;
+            if val == 2020 {
+                print!("{} + {} = {}\n", n, n2, val);
+                print!("{} * {} = {}\n", n, n2, n * n2);
+            }
+        }
+    }
+    let v3 = v.to_vec();
+    for n in v.iter() {
+        for n2 in v2.iter() {
+            for n3 in v3.iter() {
+                let val = n + n2 + n3;
+                if val == 2020 {
+                    print!("{} + {} + {} = {}\n", n, n2, n3, val);
+                    print!("{} * {} * {} = {}\n", n, n2, n3, n * n2 * n3);
+                }
+            }
+        }
+    }
 }