Initial commitHEADmain

1 files changed, 32 insertions, 0 deletions

diff --git a/pascals-triangle/src/main.rs b/pascals-triangle/src/main.rs
new file mode 100644
index 0000000..7755650
--- /dev/null
+++ b/pascals-triangle/src/main.rs
@@ -0,0 +1,32 @@
+fn main() {
+    println!("Hello, world!");
+    let tests = vec![
+        (5, vec![
+         vec![1],vec![1,1],vec![1,2,1],vec![1,3,3,1],vec![1,4,6,4,1]
+        ]),
+        (1, vec![vec![1]])
+    ];
+
+    for test in tests {
+        println!("{} is {:?} should be {:?}", test.0, Solution::generate(test.0), test.1);
+    }
+}
+
+struct Solution {}
+impl Solution {
+    pub fn generate(num_rows: i32) -> Vec<Vec<i32>> {
+        let mut rows = Vec::with_capacity(num_rows as usize);
+        rows.push(vec![1]);
+        for i in 1..num_rows {
+            let mut row: Vec<i32> = Vec::with_capacity((i+1) as usize);
+            for ii in 0..=i {
+                let above = &rows[(i-1) as usize];
+                row.push(if ii == 0 || i == ii {1} else {above[(ii-1) as usize] + above[ii as usize]});
+            }
+            rows.push(row);
+        }
+
+        rows
+    }
+}
+