Added Course Schedule Structure

Author: ryanoneill

src/course_schedule.rs

@@ -0,0 +1,41 @@
+/// There are a total of `numCourses` courses you have to take, labeled from
+/// `0` to `numCourses - 1`. You are given an array `prerequisites` where
+/// `prerequisites[i] = [ai, bi]` indicates that you must take course `bi`
+/// first if you want to take course `ai`.
+///
+/// * For example, the pair `[0, 1]`, indicates that to take a course `0` you
+/// have to first take course `1`.
+///
+/// Return `true` if you can finish all courses. Otherwise, return `false`.
+struct Solution;
+
+impl Solution {
+
+    // TODO: Implement
+    pub fn can_finish(_num_courses: i32, _prerequisites: Vec<Vec<i32>>) -> bool {
+        false
+    }
+
+}
+
+#[cfg(test)]
+mod tests {
+    use super::Solution;
+
+    #[test]
+    fn example_1() {
+        let num_courses = 2;
+        let prerequisites = vec![vec![1,0]];
+        let result = Solution::can_finish(num_courses, prerequisites);
+        assert!(result);
+    }
+
+    #[test]
+    fn example_2() {
+        let num_courses = 2;
+        let prerequisites = vec![vec![1,0], vec![0,1]];
+        let result = Solution::can_finish(num_courses, prerequisites);
+        assert!(!result);
+    }
+
+}