Create 1534-count-good-triplets.js

Author: everthis

1534-count-good-triplets.js

@@ -0,0 +1,23 @@
+/**
+ * @param {number[]} arr
+ * @param {number} a
+ * @param {number} b
+ * @param {number} c
+ * @return {number}
+ */
+const countGoodTriplets = function(arr, a, b, c) {
+  const  n = arr.length, { abs } = Math
+  let res = 0
+  
+  for(let i = 0; i < n - 2; i++) {
+    for(let j = i + 1; j < n - 1; j++) {
+      if(abs(arr[i] - arr[j]) > a) continue
+      for(let k = j + 1; k < n; k++) {
+        if(abs(arr[j] - arr[k]) <= b && abs(arr[i] - arr[k]) <= c) res++
+      }
+    }
+  }
+  
+  return res
+  
+};