rs: add “1347. Minimum Number of Steps to Make Two Strings Anagram”

Signed-off-by: Matej Focko <mfocko@redhat.com>

rs/minimum-number-of-steps-to-make-two-strings-anagram.rs

@@ -0,0 +1,20 @@
+use std::cmp;
+use std::collections::HashMap;
+
+impl Solution {
+    pub fn min_steps(s: String, t: String) -> i32 {
+        let mut counters: HashMap<char, i32> = HashMap::new();
+
+        // needed
+        for c in s.chars() {
+            *counters.entry(c).or_insert(0) += 1;
+        }
+
+        // found
+        for c in t.chars() {
+            *counters.entry(c).or_insert(0) -= 1;
+        }
+
+        counters.values().map(|count| cmp::max(0, *count)).sum()
+    }
+}