Data commit

Task/Modular-inverse/Pascal/modular-inverse.pas

@@ -0,0 +1,24 @@
+// increments e step times until bal is greater than t
+// repeats until bal = 1 (mod = 1) and returns count
+// bal will not be greater than t + e
+
+function modInv(e, t : integer) : integer;
+  var
+    d : integer;
+    bal, count, step : integer;
+  begin
+    d := 0;
+    if e < t then
+      begin
+        count := 1;
+        bal := e;
+        repeat
+          step := ((t-bal) DIV e)+1;
+          bal := bal + step * e;
+          count := count + step;
+          bal := bal - t;
+        until bal = 1;
+        d := count;
+      end;
+    modInv := d;
+  end;