alarsyo/advent-of-code
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

2020: day01: linear part 1

Browse source
This commit is contained in:
Antoine Martin 2020-12-01 17:54:44 +01:00
parent 14756db40a
commit c09ce94f6a
1 changed files with 8 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
aoc2020/src/day01.rs
View file

@ -37,14 +37,15 @@ fn part2(input: &str) -> Result<i64> {
}
fn find_2020_2_sum(entries: &[i64]) -> Result<(i64, i64)> {
let set: HashSet<i64> = entries.iter().copied().collect();
for i in 0..entries.len() {
for j in 0..entries.len() {
if i == j {
continue;
}
if entries[i] + entries[j] == 2020 {
return Ok((entries[i], entries[j]));
}
let a = entries[i];
let b = 2020 - a;
if set.contains(&b) {
return Ok((a, b));
}
}