p78

Author: ian-hon

src/p78.rs

@@ -0,0 +1,12 @@
+pub fn run() {
+    for i in [
+        [1,2,3].to_vec(),
+        [0].to_vec()
+    ] {
+        println!("{:?}", subsets(i));
+    }
+}
+
+pub fn subsets(nums: Vec<i32>) -> Vec<Vec<i32>> {
+    (0..((2f32.powi(nums.len() as i32) as i32))).into_iter().map(|i| nums.iter().enumerate().filter(|(index, _)| ((i >> index) & 1) == 1).map(|x| *x.1).collect::<Vec<i32>>()).collect()
+}