src/bin/maximize-number-of-subsequences-in-a-string.rs

Author: bestgopher

src/bin/maximize-number-of-subsequences-in-a-string.rs

@@ -0,0 +1,31 @@
+#![allow(dead_code, unused, unused_variables, non_snake_case)]
+
+fn main() {}
+
+struct Solution;
+
+impl Solution {
+    pub fn maximum_subsequence_count(text: String, pattern: String) -> i64 {
+        let mut pattern = pattern.bytes();
+        let a = pattern.next().unwrap();
+        let b = pattern.next().unwrap();
+
+        let mut count = [0; 2];
+
+        let mut result = 0;
+
+        for i in text.bytes() {
+            if i == a {
+                count[0] += 1;
+            } else if i == b {
+                result += count[0];
+                count[1] += 1;
+            }
+        }
+        if a != b {
+            result + count[0].max(count[1])
+        } else {
+            count[0] * (count[0] + 1) / 2
+        }
+    }
+}