Create 1904-the-number-of-full-rounds-you-have-played.js

Author: everthis

1904-the-number-of-full-rounds-you-have-played.js

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+/**
+ * @param {string} startTime
+ * @param {string} finishTime
+ * @return {number}
+ */
+const numberOfRounds = function(startTime, finishTime) {
+  let start = 60 * parseInt(startTime.slice(0, 2)) + parseInt(startTime.slice(3))
+  let finish = 60 * parseInt(finishTime.slice(0, 2)) + parseInt(finishTime.slice(3));
+  if (start > finish) finish += 60 * 24; // If `finishTime` is earlier than `startTime`, add 24 hours to `finishTime`.
+  return Math.floor(finish / 15) - Math.ceil(start / 15); // floor(finish / 15) - ceil(start / 15)
+};