complete 1725.rs

storage/zeta/rs/completed/1725.rs

@@ -0,0 +1,42 @@
+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 n = iter.next().unwrap();
+    let mut arr = (0..n).map(|_| iter.next().unwrap()).collect::<Vec<_>>();
+
+    let mut stack = vec![(0, 0)];
+    let mut res = 0;
+    for i in 1..=n {
+        let e = arr[i - 1];
+        let (mut top_i, mut top_e) = *stack.last().unwrap();
+
+        while top_e >= e {
+            let (p_i, p_e) = stack.pop().unwrap();
+            if stack.is_empty() {
+                break;
+            }
+            (top_i, top_e) = *stack.last().unwrap();
+            res = res.max((i - top_i - 1) * p_e);
+            
+        }
+        if stack.is_empty() {
+            stack.push((i, e));
+            continue;
+        }
+        stack.push((i, e));
+        res = res.max((i - top_i) * e);
+    }
+    while stack.len() > 1 {
+        let (ti, te) = stack.pop().unwrap();
+        let (top_i, top_e) = stack.last().unwrap();
+        res = res.max((n - top_i) * te);
+        
+    }
+
+    println!("{}", res);
+}