Data update

Task/Non-continuous-subsequences/Rust/non-continuous-subsequences.rs

@@ -0,0 +1,39 @@
+const M: usize = 0;
+const C: usize = 1;
+const CM: usize = 2;
+const CMC: usize = 3;
+static SKIP: [usize; 4] = [M, CM, CM, CMC];
+static INCL: [usize; 4] = [C, C, CMC, CMC];
+
+fn ncs(s: &Vec<i32>) -> Vec<Vec<i32>> {
+    if s.len() < 3 {
+        return vec![];
+    }
+    let mut v1 = n2([].to_vec(), s[1..].to_vec(), M);
+    let mut v2 = n2([s[0]].to_vec(), s[1..].to_vec(), C);
+    v1.append(&mut v2);
+    return v1;
+}
+
+fn n2(ss: Vec<i32>, tail: Vec<i32>, seq: usize) -> Vec<Vec<i32>> {
+    if tail.len() == 0 {
+        if seq != CMC as usize {
+            return vec![];
+        }
+        return [ss].to_vec();
+    }
+    let mut v1 = n2(ss.clone(), tail[1..].to_vec(), SKIP[seq]);
+    let mut v2 = ss.clone();
+    v2.push(tail[0]);
+    let mut v3 = n2(v2, tail[1..].to_vec(), INCL[seq]);
+    v1.append(&mut v3);
+    return v1;
+}
+
+fn main() {
+    let ss = ncs(&[1, 2, 3, 4].to_vec());
+    println!("{} non-continuous subsequences:", ss.len());
+    for s in ss {
+        println!("  {:?}", s);
+    }
+}