From b6403b910fb4a7f2658027804dae3c01e1a473b4 Mon Sep 17 00:00:00 2001
From: Lucas Virgili <luvirgili@gmail.com>
Date: Sun, 20 May 2012 12:18:34 -0300
Subject: [PATCH] 91

---
 Lvl4/euler91.cpp | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 Lvl4/euler91.cpp

diff --git a/Lvl4/euler91.cpp b/Lvl4/euler91.cpp
new file mode 100644
index 0000000..1a5bf35
--- /dev/null
+++ b/Lvl4/euler91.cpp
@@ -0,0 +1,29 @@
+#include <iostream>
+using namespace std;
+
+int main() {
+     int L = 50;
+     unsigned cnt = 3*L*L;
+     for (int x1 = 2; x1 <= L; ++x1) {
+          for (int x2 = 1; x2 < x1; ++x2) {
+               for (int y = 1; y <= L; ++y) {
+                    if ((x2*x2 + y*y - x1*x2) == 0) {
+                         cnt += 2;
+                    }
+               }
+          }
+     }
+     for (int x1 = 2; x1 <= L; ++x1) {
+          for (int x2 = 1; x2 < x1; ++x2) {
+               for (int y2 = 2; y2 <= L; ++y2) {
+                    for (int y1 = 1; y1 < y2; ++y1) {
+                         if ((x1*x1 + y1*y1 - x1*x2 - y1*y2) == 0) {
+                              cnt += 2;
+                         }
+                    }
+               }
+          }
+     }
+     cout << cnt << endl;
+     return 0;
+}