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>()
+    }
+}