1 files changed, 9 insertions, 0 deletions
diff --git a/progs/a599.py b/progs/a599.py
new file mode 100644
index 0000000..789a533
--- /dev/null
+++ b/progs/a599.py
@@ -0,0 +1,9 @@
+def No_of_Triangle(N,K):
+    if (N < K):
+        return -1;
+    else:
+        Tri_up = 0;
+        Tri_up = ((N - K + 1) *(N - K + 2)) // 2;
+        Tri_down = 0;
+        Tri_down = ((N - 2 * K + 1) *(N - 2 * K + 2)) // 2;
+        return Tri_up + Tri_down;
+\ No newline at end of file