import java.util.Scanner;

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
import java.util.Random;
import java.util.Scanner;
/**
 *
 * @author Dimitri
 */
public class Calculator {
    /*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
    public static void main(String[] args) {
         Scanner sc = new Scanner(System.in);
         System.out.println("Attacker troops: ");
         int a = sc.nextInt();
         System.out.println("Defender troops: ");
         int b = sc.nextInt();
         System.out.println("");
         System.out.println("Number of simulations: ");
         int c = sc.nextInt();
         System.out.println("");
         System.out.println("");

         System.out.println("Percent chance of victory: " + ((float)Simulate(a, b, c)/c));
    }

    public static long Simulate(int troopsA, int troopsB, long sims){
        int oTroopsA = troopsA;
        int oTroopsB = troopsB;
        int winCount = 0;
        long oSims = sims;
        while (sims > 0){
            //System.out.println(sims);
        while (troopsA != 0 && troopsB != 0){

        int diceA1 = 0;
        int diceA2 = 0;
        int diceA3 = 0;

        int diceB1 = 0;
        int diceB2 = 0;

        switch (troopsA){
            default:
            case 3:
                diceA3 = 6;
            case 2:
                diceA2 = 6;
            case 1:
                diceA1 = 6;
        }

        switch (troopsA){
            default:
            case 2:
                diceA3 = 6;
            case 1:
                diceA2 = 6;
        }

        int rollA1 = (int) (Math.random()*diceA1);
        int rollA2 = (int) (Math.random()*diceA2);
        int rollA3 = (int) (Math.random()*diceA3);

        int rollB1 = (int) (Math.random()*diceB1);
        int rollB2 = (int) (Math.random()*diceB2);

        int aMax = 0;
        int aMid = 0;
        int aMin = 0;

        int bMax = 0;
        int bMin = 0;

        if (rollA1 >= rollA2 && rollA1 >= rollA3){
            aMax = rollA1;
            if (rollA2 >= rollA3){
                aMid = rollA2;
                aMin = rollA3;
            } else{
                aMid = rollA3;
                aMin = rollA2;
            }
        } else if (rollA2 >= rollA3){
            aMax = rollA1;
            if (rollA1 >= rollA3){
                aMid = rollA1;
                aMin = rollA3;
            } else{
                aMid = rollA3;
                aMin = rollA1;
            }
        } else {
            aMax = rollA1;
            if (rollA2 >= rollA1){
                aMid = rollA2;
                aMin = rollA1;
            } else{
                aMid = rollA1;
                aMin = rollA2;
            }
        }

        if (rollA1 >= rollA2){
            bMax = rollB1;
            bMin = rollB2;
        }else{
            bMax = rollB2;
            bMin = rollB1;
        }

            if (aMax > bMax){
            troopsB --;
            }else{
            troopsA --;
            }

            if (aMid != 0 && bMin != 0){
            if (aMid > bMin){
            troopsB --;

            }else{
            troopsA --;

            }
            }
        }
        if (troopsB == 0){
            winCount ++;
        }
        sims --;

        troopsA = oTroopsA;
        troopsB = oTroopsB;
        }

        //System.out.println(winCount);
        double winPerc = (winCount / oSims);

        return winCount;
    }



}