complete 2600.cpp 6906.cpp 4881.rs 24753.rs 34423.rs

storage/zeta/rs/completed/24753.rs

@@ -0,0 +1,33 @@
+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 s = iter.next().unwrap();
+    let n = iter.next().unwrap();
+
+    let arr = (0..n).map(|_| iter.next().unwrap());
+
+    let mut seat_stat = vec![false; s];
+
+    for i in arr {
+        seat_stat[i - 1] = true;
+    }
+
+    let mut cnt = 0;
+    for i in 0..s {
+        if !seat_stat[i] {
+            let left = if i == 0 { s - 1 } else { i - 1 };
+            let right = (i + 1) % s;
+
+            if !seat_stat[left] && !seat_stat[right] {
+                seat_stat[i] = true;
+                cnt += 1;
+            }
+        }
+    }
+    println!("{}", cnt);
+}