From ae751f4ce89ffe2f249b6084f0097d7f089600c3 Mon Sep 17 00:00:00 2001
From: Abhishek Sharma <sharma.abhishek1282000@gmail.com>
Date: Thu, 1 Oct 2020 21:08:27 +0530
Subject: [PATCH] Create #1.cpp

---
 Project Euler - HackerRank/#1.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 Project Euler - HackerRank/#1.cpp

diff --git a/Project Euler - HackerRank/#1.cpp b/Project Euler - HackerRank/#1.cpp
new file mode 100644
index 000000000..5e038fda9
--- /dev/null
+++ b/Project Euler - HackerRank/#1.cpp	
@@ -0,0 +1,11 @@
+  
+t=int(input())
+def ar(x):
+    return x*(x+1);
+for i in range(t):
+    n =int(input())
+    n -=1;
+    a=int(n/3);
+    b=int(n/5);
+    c=int(n/15);
+    print(int(int(3*ar(a) + 5*ar(b) - 15*ar(c))>>1));