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authorJune McEnroe <programble@gmail.com>2017-12-05 00:17:39 -0500
committerJune McEnroe <programble@gmail.com>2017-12-05 00:17:39 -0500
commit625eaa034aacfb3209fb97efb3ecf664c1827e3a (patch)
treeba29b42f90a8b0ac3185c0b74561a23ad7a68193 /2017/src
parentDay 4, part 2 (diff)
downloadaoc-625eaa034aacfb3209fb97efb3ecf664c1827e3a.tar.gz
aoc-625eaa034aacfb3209fb97efb3ecf664c1827e3a.zip
Day 5
Diffstat (limited to '2017/src')
-rw-r--r--2017/src/bin/day05.rs31
1 files changed, 31 insertions, 0 deletions
diff --git a/2017/src/bin/day05.rs b/2017/src/bin/day05.rs
new file mode 100644
index 0000000..b8e21d9
--- /dev/null
+++ b/2017/src/bin/day05.rs
@@ -0,0 +1,31 @@
+use std::io::{self, Read};
+
+fn solve1(input: &str) -> u32 {
+    let mut jumps: Vec<isize> = input.lines()
+        .map(str::parse)
+        .map(Result::unwrap)
+        .collect();
+
+    let mut index = 0isize;
+    for step in 0.. {
+        if index < 0 || index >= jumps.len() as isize {
+            return step;
+        }
+        let jump = &mut jumps[index as usize];
+        index += *jump;
+        *jump += 1;
+    }
+    unreachable!()
+}
+
+fn main() {
+    let mut input = String::new();
+    io::stdin().read_to_string(&mut input).unwrap();
+
+    println!("Part 1: {}", solve1(&input));
+}
+
+#[test]
+fn part1() {
+    assert_eq!(5, solve1("0\n3\n0\n1\n-3\n"));
+}