solutions: 236A

solutions/rust/236A.rs

@@ -0,0 +1,16 @@
+use std::io;
+use std::collections::HashSet;
+
+fn main() {
+    let mut s = String::new();
+    io::stdin().read_line(&mut s).unwrap();
+
+    let mut seen = HashSet::new();
+    s.retain(|c| seen.insert(c));
+
+    if s.trim().len() % 2 != 0 {
+        println!("IGNORE HIM!");
+    } else {
+        println!("CHAT WITH HER!");
+    }
+}