2 files changed, 19 insertions, 0 deletions
diff --git a/matrix-diagonal-sum/Cargo.toml b/matrix-diagonal-sum/Cargo.toml
new file mode 100644
index 0000000..b0abc38
--- /dev/null
+++ b/matrix-diagonal-sum/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "matrix-diagonal-sum"
+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/matrix-diagonal-sum/src/main.rs b/matrix-diagonal-sum/src/main.rs
new file mode 100644
index 0000000..8ee95a0
--- /dev/null
+++ b/matrix-diagonal-sum/src/main.rs
@@ -0,0 +1,11 @@
+fn main() {
+    println!("Hello, world!");
+}
+
+struct Solution {}
+impl Solution {
+    pub fn diagonal_sum(mat: Vec<Vec<i32>>) -> i32 {
+        mat.iter().enumerate()
+            .fold(0, |acc, (i, row)| acc + row[i] + if i != row.len()-1 -i {row[row.len()-1 -i]} else {0})
+    }
+}