From 8fbb97134651287dbe1bb3dfe395052ce2404088 Mon Sep 17 00:00:00 2001
From: Sean-HL-Lin <hongshenglin92@gmail.com>
Date: Wed, 9 Oct 2019 12:11:29 -0700
Subject: [PATCH] add solution for sum_square_difference

---
 Solutions/sum_square_difference.js | 33 ++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 Solutions/sum_square_difference.js

diff --git a/Solutions/sum_square_difference.js b/Solutions/sum_square_difference.js
new file mode 100644
index 0000000..67dbd72
--- /dev/null
+++ b/Solutions/sum_square_difference.js
@@ -0,0 +1,33 @@
+const readline = require('readline');
+
+const rl = readline.createInterface({
+  input: process.stdin,
+  output: process.stdout
+});
+
+let numbers
+let testcases = []
+let count = 1
+rl.on('line', (input) => {
+  if (!numbers) {
+    numbers = parseInt(input);
+  } else {
+    if (count < numbers) {
+      testcases.push(parseInt(input));
+      count ++;
+    } else if (count === numbers) {
+      testcases.push(parseInt(input));
+      // here comes the logic
+      for (let top of testcases) {
+        let squareSums = 0
+        let sum = 0 
+        for (let i = 1; i <= top; i ++) {
+          squareSums += i*i
+          sum += i
+        }
+        console.log(sum*sum - squareSums)
+      }
+      rl.close()
+    }
+  };
+});