ABC 049, abc done, d is too slow and incorrect, need to learn more about union find

atcoder/beginner_contests/abc049/src/bin/b.rs

@@ -0,0 +1,14 @@
+use proconio::input;
+
+fn main(){
+    input!{
+        h: u32,
+        _w: u32,
+        c: [String; h],
+    };
+
+    for s in c {
+        println!("{}", s);
+        println!("{}", s);
+    }
+}