20240418 Finished

src/problem/mod.rs

@@ -104,4 +104,5 @@ mod p45_jump_game_ii;
 mod p274_h_index;
 mod p380_insert_delete_getrandom_o1;
 mod p238_product_of_array_except_self;
-mod p134_gas_station;
+mod p134_gas_station;
+mod p135_candy;

src/problem/p135_candy.rs

@@ -0,0 +1,40 @@
+/**
+ * [135] Candy
+ */
+pub struct Solution {}
+
+// submission codes start here
+
+impl Solution {
+    pub fn candy(ratings: Vec<i32>) -> i32 {
+        let n = ratings.len();
+        let mut children = vec![1; n];
+
+        for i in 1..n {
+            if ratings[i] > ratings[i - 1] {
+                children[i] = children[i].max(children[i - 1] + 1);
+            }
+        }
+
+        for i in (0..n - 1).rev() {
+            if ratings[i] > ratings[i + 1] {
+                children[i] = children[i].max(children[i + 1] + 1);
+            }
+        }
+
+        children.iter().sum()
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_135() {
+        assert_eq!(5, Solution::candy(vec![1, 0, 2]));
+        assert_eq!(4, Solution::candy(vec![1, 2, 2]));
+    }
+}