add cf ecr-188 ABCDE

storage/cf/rs/ecr-188-D.rs

@@ -0,0 +1,36 @@
+use std::io::{read_to_string, stdin};
+
+fn main() {
+    let temp = read_to_string(stdin()).unwrap();
+    let mut iter = temp
+        .split_ascii_whitespace()
+        .map(|x| x.parse::<usize>().unwrap());
+
+    let t = iter.next().unwrap();
+    (0..t).for_each(|_| {
+        let (n, m) = (iter.next().unwrap(), iter.next().unwrap());
+        let mut res = 0;
+        if m == 0 {
+            res = n;
+        } else {
+            let mut edges = vec![vec![]; n];
+            let mut vis = vec![false; n];
+            for _ in 0..m {
+                let (u, v) = (iter.next().unwrap() - 1, iter.next().unwrap() - 1);
+                edges[u].push(v);
+                edges[v].push(u);
+            }
+
+            let mut deq = vec![];
+            for i in 0..n {
+                deq.push(i);
+            }
+
+            while !deq.is_empty() {
+                let ()
+            }
+
+
+        }
+    });
+}