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advent of code day 01

master
Dan Ballard 1 year ago
commit
dd87be81ed
  1. 3
      .gitignore
  2. 9
      Cargo.toml
  3. 200
      inputs/01-01.txt
  4. 39
      src/lib.rs
  5. 8
      src/main.rs

3
.gitignore

@ -0,0 +1,3 @@
/target
.idea
Cargo.lock

9
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]

200
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

39
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(());
}

8
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");
}
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