In [Course Schedule I](https://leetcode.com/problems/course-schedule/)\nSome courses may have prerequisites, for example to take course 0 you have to first take course 1, which is expressed as a pair: `[0,1]`\n\nIn [Course Schedule II](https://leetcode.com/problems/course-schedule-ii/)\nSome courses may have prerequisites, for example to take course 0 you have to first take course 1, which is expressed as a pair: `[0,1]`\n\nIn[ Course Schedule VI](https://leetcode.com/problems/course-schedule-iv/)\nSome courses may have direct prerequisites, for example, to take course 0 you have first to take course 1, which is expressed as a pair: `[1,0]`\n\n\nIn the first two questions, `[0,1]` but in the last one it is `[1,0]`.\nIs it an inconsistency or a typo?\n\n

In Course Schedule I\nSome courses may have prerequisites, for example to take course 0 you have to first take course 1, which is expressed as a pair: [0,1]\n\n