1 files changed, 9 insertions, 0 deletions
diff --git a/math/modMulIterativ.cpp b/math/modMulIterativ.cpp
new file mode 100644
index 0000000..611f09a
--- /dev/null
+++ b/math/modMulIterativ.cpp
@@ -0,0 +1,9 @@
+ll mulMod(ll a, ll b, ll n) {
+	ll res = 0;
+	while (b > 0) {
+		if (b & 1) res = (a + res) % n;
+		a = (a * 2) % n;
+		b /= 2;
+	}
+	return res;
+}