multiply polynomials

Main.java

@@ -98,4 +98,41 @@ public class Main {
 		return result;
 	}
 
+	public static LinkedList<Integer> shiftList(LinkedList<Integer> p, int places){
+		
+		LinkedList<Integer> result = new LinkedList<Integer>(p);
+		
+		if(places == 0) {
+			return result;
+		}
+		
+		for(; places>0; places--) {
+			result.addFirst(0);
+		}
+		return result;
+	}
+
+
+	public static LinkedList<Integer> polynomialsMultiplication(LinkedList<Integer> p1, LinkedList<Integer> p2){
+		
+		// suma dlugosci
+		int amount = p1.size() + p2.size();
+		
+		// nowy wielomian bedzie dlugosci sumy poteg wyrazow wiodacych obu tablic -1
+		LinkedList<Integer> result = new LinkedList<Integer>();
+		
+		for(int i=0;i<amount-1;i++) {
+			result.add(0);
+		}
+		
+		// mnozenie
+		for(int i=0; i<p1.size(); i++) {
+			
+			for(int j=0; j<p2.size(); j++) {
+				result.set(i+j, (result.get(i+j) + p1.get(i) * p2.get(j)));
+			}
+		}
+		return result;
+	
+	}	
 }