complete 5920.rs 21966.rs

storage/zeta/rs/completed/21966.rs

@@ -0,0 +1,40 @@
+use std::io::stdin;
+
+fn main() {
+    let mut s = String::new();
+    stdin().read_line(&mut s).unwrap();
+    s.clear();
+    stdin().read_line(&mut s).unwrap();
+    s = s.trim().to_string();
+    let n = s.len();
+    let mut sentence_map = vec![0; n];
+
+    let mut curr_sentence = 0;
+    for (i, c) in s.char_indices() {
+        if c == '.' {
+            sentence_map[i] = curr_sentence;
+            curr_sentence += 1;
+        } else {
+            sentence_map[i] = curr_sentence;
+        }
+    }
+    if n <= 25 {
+        println!("{}", s);
+    } else if sentence_map[11] == sentence_map[n - 12] {
+        let first = &s[0..11];
+        let last = &s[(n - 11)..n];
+        let mut res = String::new();
+        res.push_str(first);
+        res.push_str("...");
+        res.push_str(last);
+        println!("{}", res);
+    } else {
+        let first = &s[0..9];
+        let last = &s[(n - 10)..n];
+        let mut res = String::new();
+        res.push_str(first);
+        res.push_str("......");
+        res.push_str(last);
+        println!("{}", res);
+    }
+}