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author | Orangerot <purple@orangerot.dev> | 2024-06-27 11:30:16 +0200 |
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committer | Orangerot <purple@orangerot.dev> | 2024-06-27 11:30:16 +0200 |
commit | 4b0a6a01b051a4ebfbc17661d14cb23fe4f275fb (patch) | |
tree | 0072cca328fe5adb2ed61004010228ff85e2164d /number-of-equivalent-domino-pairs |
Diffstat (limited to 'number-of-equivalent-domino-pairs')
-rw-r--r-- | number-of-equivalent-domino-pairs/Cargo.toml | 8 | ||||
-rw-r--r-- | number-of-equivalent-domino-pairs/src/main.rs | 17 |
2 files changed, 25 insertions, 0 deletions
diff --git a/number-of-equivalent-domino-pairs/Cargo.toml b/number-of-equivalent-domino-pairs/Cargo.toml new file mode 100644 index 0000000..b0cfcd7 --- /dev/null +++ b/number-of-equivalent-domino-pairs/Cargo.toml @@ -0,0 +1,8 @@ +[package] +name = "number-of-equivalent-domino-pairs" +version = "0.1.0" +edition = "2021" + +# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html + +[dependencies] diff --git a/number-of-equivalent-domino-pairs/src/main.rs b/number-of-equivalent-domino-pairs/src/main.rs new file mode 100644 index 0000000..ff16907 --- /dev/null +++ b/number-of-equivalent-domino-pairs/src/main.rs @@ -0,0 +1,17 @@ +fn main() { + println!("Hello, world!"); +} + +struct Solution; + +impl Solution { + pub fn num_equiv_domino_pairs(dominoes: Vec<Vec<i32>>) -> i32 { + let mut map = [0;100]; + for d in dominoes { + if let [i,j] = d[..] { + map[(i.max(j) * 10 + i.min(j)) as usize] += 1; + } + } + map.iter().filter(|&&x| x > 1).map(|&x| (x *(x-1))/2).sum::<i32>() + } +} |