advent of code day 01

.gitignore

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+/target
+.idea
+Cargo.lock

Cargo.toml

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+[package]
+name = "advent_of_code"
+version = "0.1.0"
+authors = ["Dan Ballard <dan@mindstab.net>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

inputs/01-01.txt

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+1956
+1994
+457
+1654
+2003
+1902
+1741
+1494
+1597
+1129
+1146
+1589
+1989
+1093
+1881
+1288
+1848
+1371
+1508
+1035
+1813
+1335
+1634
+1102
+1262
+1637
+1048
+1807
+1270
+1528
+1670
+1803
+1202
+1294
+1570
+1640
+1484
+1872
+1140
+1207
+1485
+1781
+1778
+1772
+1334
+1267
+1045
+1194
+1873
+1441
+1557
+1414
+1123
+1980
+1527
+1591
+1665
+1916
+1662
+1139
+1973
+1258
+1041
+1134
+1609
+1554
+1455
+1124
+1478
+1938
+1759
+1281
+1410
+1511
+930
+1319
+1302
+1827
+1216
+1404
+1460
+2002
+1590
+1817
+1341
+1631
+1608
+1382
+1158
+1594
+1049
+1804
+1555
+1753
+447
+1021
+1079
+609
+1766
+1327
+1851
+1052
+1737
+1175
+1043
+1945
+1573
+1113
+1724
+1203
+1856
+1682
+1623
+1135
+1015
+1423
+1412
+1315
+1375
+1895
+1351
+1530
+1758
+1445
+1518
+1819
+1567
+1305
+1919
+1952
+1432
+1099
+1476
+1883
+1871
+1900
+1442
+1393
+1214
+1283
+1538
+1391
+1008
+1109
+1621
+1876
+1998
+1032
+1324
+1927
+481
+1732
+1370
+1683
+1199
+1465
+1882
+1293
+1671
+1456
+1197
+1506
+1381
+1469
+1830
+1957
+1850
+1184
+1564
+1170
+1943
+1131
+1867
+1208
+1788
+1337
+1722
+1760
+1651
+1069
+1574
+1959
+1770
+66
+1190
+1606
+1899
+1054
+980
+1693
+1173
+1479
+1333
+1579
+1720
+1782
+1971
+1438
+1178
+1306

src/lib.rs

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+
+use std::fs::File;
+use std::io::{prelude::*, BufReader, Error};
+
+
+
+pub fn aoc_01_01(filename: &str) -> Result<(), Error> {
+
+    let file = File::open(filename).expect("No file");
+    let br = BufReader::new(file);
+    let mut v: Vec<i64> = vec![];
+
+    for line in br.lines() {
+        v.push(line?
+            .trim()
+            .parse().unwrap());
+    }
+
+    for i in 0..v.len()-2 {
+        for j in i+1..v.len()-1 {
+            if v[i] + v[j] == 2020 {
+                println!("aoc_01_01 result: {}", v[i]*v[j]);
+            }
+        }
+    }
+
+    for i in 0..v.len()-3 {
+        for j in i+1..v.len()-2 {
+            for k in j+1..v.len()-1 {
+                if v[i] + v[j] + v[k] == 2020 {
+                    println!("aoc_01_02 result: {}", v[i] * v[j] * v[k]);
+                }
+            }
+        }
+    }
+
+    return Ok(());
+
+}

src/main.rs

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+
+
+
+fn main() {
+    //let filename = env::args().nth(1).expect("input filename required");
+
+    advent_of_code::aoc_01_01("./inputs/01-01.txt");
+}