Create 1726-tuple-with-same-product.js

Author: everthis

1726-tuple-with-same-product.js

@@ -0,0 +1,21 @@
+/**
+ * @param {number[]} nums
+ * @return {number}
+ */
+const tupleSameProduct = function(nums) {
+  const m = {}
+  const len = nums.length
+  for(let i = 0; i < len - 1; i++) {
+    for(let j = i + 1; j < len; j++) {
+      const tmp = nums[i] * nums[j]
+      if(m[tmp] == null) m[tmp] = 0
+      m[tmp]++
+    } 
+  }
+  let res = 0
+  Object.keys(m).forEach(e => {
+    if(m[e] > 1) res += m[e] * (m[e] - 1)  * 4
+  })
+  
+  return res
+};