init

problems/p15/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "p15"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

problems/p15/src/main.rs

@@ -0,0 +1,14 @@
+fn path(n: u16) {
+    let mut map: Vec<Vec<u64>> = vec![vec![1; n as usize]; n as usize];
+
+    for i in 1..n as usize {
+        for j in 1..n as usize {
+            map[i][j] = map[i - 1][j] + map[i][j - 1];
+        }
+    }
+    println!("{}", map[(n - 1) as usize][(n - 1) as usize]);
+}
+
+fn main() {
+    path(21);
+}