diff --git a/Ring.java b/Ring.java
deleted file mode 100644
index 5a29b91..0000000
--- a/Ring.java
+++ /dev/null
@@ -1,89 +0,0 @@
-import java.util.ArrayList;
-
-public class Ring {
-    int n;
-    ArrayList<Integer> odwracalne;
-    ArrayList<Integer> dzielniki;
-    ArrayList<Integer> nilpotentne;
-    ArrayList<Integer> idempotentne;
-
-    public Ring(int n) {
-        this.n = n;
-        odwracalne = new ArrayList<>();
-        dzielniki = new ArrayList<>();
-        nilpotentne = new ArrayList<>();
-        idempotentne = new ArrayList<>();
-    }
-    private int nwd(int a, int b){
-        while (a != b){
-            if (a > b) a -=b;
-            else b -= a;
-        }
-        return a;
-    }
-
-    private int phi(int a){
-        float result = a;
-        for (int p = 2; p * p <= a; ++p) {
-            if (a % p == 0) {
-                while (a % p == 0)
-                    a /= p;
-                result *= (1.0 - (1.0 / (float)p));
-            }
-        }
-        if (a > 1)
-            result *= (1.0 - (1.0 / (float)a));
-
-        return (int)result;
-    }
-
-    static int modularPower(int x, int y, int p){
-        int res = 1;
-        x = x % p;
-
-        while (y > 0){
-            if((y & 1)==1) res = (res * x) % p;
-            y = y >> 1;
-            x = (x * x) % p;
-        }
-        return res;
-    }
-
-    void wyznaczOdwracalne(){
-        for (int i = 1; i < n; ++i){
-            if (nwd(i, n) == 1) odwracalne.add(i);
-        }
-    }
-
-    void wyznaczDzielniki(){
-        for (int i = 1; i < n; ++i){
-            for (int j = 1; j < n; ++j){
-                if(((i * j) % n) == 0){
-                    dzielniki.add(i);
-                    break;
-                }
-            }
-        }
-    }
-
-    void wyznaczNil(){
-        for (int i = 1; i < n; ++i){
-            for (int j = 1; j <= phi(n); ++j){
-                if (modularPower(i, j, n) == 0){
-                    nilpotentne.add(i);
-                    break;
-                }
-            }
-        }
-    }
-
-    void wyznaczId(){
-        int pow;
-        for (int i = 0; i < n; ++i){
-            pow = (i * i) % n;
-            if (pow == i){
-                idempotentne.add(i);
-            }
-        }
-    }
-}