Merge pull request #24 from jtr109/jump-game-ii

Jump game ii

Author: jtr109

Cargo.lock

@@ -16,4 +16,5 @@ members = [
     "course_schedule_iii",
     "prefix_and_suffix_search",
     "non_decreasing_array",
+    "jump_game_ii",
 ]

Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "jump_game_ii"
+version = "0.1.0"
+authors = ["Ryan Li <conbas2019@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

jump_game_ii/Cargo.toml

@@ -0,0 +1,38 @@
+pub struct Solution {}
+
+impl Solution {
+    pub fn jump(nums: Vec<i32>) -> i32 {
+        let mut target = nums.len() - 1;
+        let mut jumps = 0;
+        'target_loop: loop {
+            if target == 0 {
+                break;
+            }
+            for cursor in 0..target {
+                if cursor + nums[cursor] as usize >= target {
+                    jumps += 1;
+                    target = cursor;
+                    continue 'target_loop;
+                }
+            }
+        }
+        jumps
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn example_1() {
+        let nums = vec![2, 3, 1, 1, 4];
+        assert_eq!(Solution::jump(nums), 2);
+    }
+
+    #[test]
+    fn example_2() {
+        let nums = vec![2, 3, 0, 1, 4];
+        assert_eq!(Solution::jump(nums), 2);
+    }
+}