4 files changed, 296 insertions, 0 deletions
diff --git a/01/Cargo.toml b/01/Cargo.toml
new file mode 100644
index 0000000..4534ef6
--- /dev/null
+++ b/01/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "advent_01"
+version = "0.1.0"
+authors = ["Irene Knapp <ireneista@gmail.com>"]
+edition = "2018"
+
+[dependencies]
+advent_lib = { path = "../lib" }
+
+[dev-dependencies]
+assert_cmd = "0.10"
diff --git a/01/input b/01/input
new file mode 100644
index 0000000..0cf9a7b
--- /dev/null
+++ b/01/input
@@ -0,0 +1,200 @@
+1130
+1897
+1850
+1218
+1198
+1761
+1082
+1742
+1821
+1464
+1834
+1413
+1917
+1746
+1954
+1942
+1560
+1227
+1852
+1976
+1773
+1404
+1824
+1011
+1532
+1306
+1819
+1739
+1540
+1973
+1436
+1196
+1176
+1856
+1332
+1617
+1895
+1749
+1718
+1536
+1811
+113
+1008
+1908
+1799
+1914
+1603
+1782
+1980
+1228
+1838
+2006
+1953
+1846
+1903
+1470
+1774
+1599
+1446
+1324
+1054
+1952
+1928
+1997
+1764
+1943
+1932
+1615
+1428
+1036
+721
+1097
+1998
+1033
+1892
+1904
+1803
+1825
+1370
+1836
+1853
+1963
+1469
+1385
+246
+1987
+1153
+178
+1790
+1927
+1139
+1865
+1804
+1974
+1235
+1681
+1185
+2009
+1894
+1141
+1203
+1808
+1867
+1274
+1891
+1779
+1342
+1920
+851
+1994
+1975
+1979
+1880
+1647
+1365
+448
+1119
+1256
+1212
+1268
+1878
+1805
+1889
+1870
+1906
+1959
+1898
+1305
+1559
+1088
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+1841
+1864
+1961
+1267
+1437
+1823
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+1745
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+1491
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+1945
+1702
+1900
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+1289
+1992
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+1967
+1966
+1283
+2002
+1195
+1066
+1924
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+1971
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+219
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diff --git a/01/src/main.rs b/01/src/main.rs
new file mode 100644
index 0000000..b7cdbbf
--- /dev/null
+++ b/01/src/main.rs
@@ -0,0 +1,68 @@
+use advent_lib::prelude::*;
+
+use std::collections::BTreeSet;
+
+
+fn main() -> Result<()> {
+  let mut args = std::env::args();
+  if args.len() != 2 {
+    eprintln!("Usage: advent input");
+  }
+  let _ = args.next();
+  let filename = args.next().unwrap();
+
+  let mut input = advent_lib::read_int_file(&filename)?;
+
+  input.sort();
+
+  let mut input_set = BTreeSet::new();
+  for item in &input {
+    input_set.insert(item);
+  }
+
+  for i in 0 .. input.len() {
+    let a = input[i];
+    if a > 2020 {
+      break;
+    }
+
+    let b = 2020 - a;
+    if input_set.contains(&b) {
+      let product = a * b;
+      println!("a: {:?}, b: {:?}, a*b: {:?}", a, b, product);
+      break;
+    }
+  }
+
+  let mut done = false;
+  for i in 0 .. input.len() {
+    if done {
+      break;
+    }
+
+    let a = input[i];
+    if a > 2020 {
+      break;
+    }
+
+    for j in i+1 .. input.len() {
+      let b = input[j];
+
+      if a + b > 2020 {
+        break;
+      }
+
+      let c = 2020 - a - b;
+      if input_set.contains(&c) {
+        let product = a * b * c;
+        println!("a: {:?}, b: {:?}, c: {:?}, a*b*c: {:?}", a, b, c, product);
+
+        done = true;
+        break;
+      }
+    }
+  }
+
+  Ok(())
+}
+
diff --git a/01/tests/main.rs b/01/tests/main.rs
new file mode 100644
index 0000000..b3d3cec
--- /dev/null
+++ b/01/tests/main.rs
@@ -0,0 +1,17 @@
+use assert_cmd::prelude::*;
+//use predicates::prelude::*;
+use std::process::Command;
+
+
+#[test]
+fn personal_input() -> Result<(), Box<dyn std::error::Error>> {
+  let mut command = Command::cargo_bin("advent_01")?;
+
+  command.arg("input");
+  command.assert().success().stdout(
+      "a: 246, b: 1774, a*b: 436404\n\
+      a: 448, b: 721, c: 851, a*b*c: 274879808\n");
+
+  Ok(())
+}
+