Create 1688-count-of-matches-in-tournament.js

Author: chetannada

javascript/1688-count-of-matches-in-tournament.js

@@ -0,0 +1,24 @@
+/**
+ * @param {number} n
+ * @return {number}
+ */
+var numberOfMatches = function (n) {
+    let matches = 0; // initialize matches to zero
+    let num = n; // initialize num equal to n
+    for (let i = 0; i < n; i++) { // loop through the number n
+        if (num == 1) { // if num is equal to 1 then break the for loop
+            break;
+        } else { // else
+            if (num % 2 == 0) { // if num is even
+                let divide = num / 2; // divide num by 2
+                matches += divide; // add divide to matches
+                num -= divide; // subtract divide to num
+            } else { // else
+                let divide = (num - 1) / 2; // subtract num by 1 and then divide it by 2
+                matches += divide; // add divide to matches
+                num -= divide; // subtract divide to num
+            }
+        }
+    }
+    return matches; // return number matches
+};