diff --git a/src/assets/fc.circom b/src/assets/fc.circom
index 8c75ef5..35e5d31 100644
--- a/src/assets/fc.circom
+++ b/src/assets/fc.circom
@@ -1,5 +1,20 @@
 pragma circom 2.0.0;
 
+template Switcher() {
+    signal input sel;
+    signal input L;
+    signal input R;
+    signal output outL;
+    signal output outR;
+
+    signal aux;
+
+    aux <== (R-L)*sel;    // We create aux in order to have only one multiplication
+    outL <==  aux + L;
+    outR <== -aux + R;
+}
+
+
 template fc (width, height) {
     signal input in[width];
     signal input weights[height][width];