import java.util.ArrayList;

public class CorrectMultiplicationTwo {

	public int getMinimum(int a, int b, int c) {
		int ans = Integer.MAX_VALUE;
		for ( int i = -100 ; i < 100 ; i++ ) {
			if ( c+i <= 0 ) i = (c*-1)+2;
			ArrayList<Integer> factors = factor(c+i);
			int j = factors.size()/2;
			if ( factors.size()%2 != 0 ) j++;
			for ( int k = 0 ; k <= j ; k++ ) {
				int A = factors.get(k);
				int B = factors.get(factors.size()-k-1);
				ans = Math.min( ans, Math.abs( A-a ) + Math.abs( B-b ) + Math.abs( i ) );
				ans = Math.min( ans, Math.abs( B-a ) + Math.abs( A-b ) + Math.abs( i ) );
		//		System.out.println( A+"  "+B+"  "+c+"  "+C );
			}
		}
		System.out.println( ans );
		return ans;


	}
	ArrayList<Integer> factor( int num ) {
		ArrayList<Integer> ans = new ArrayList<Integer>();
		for ( int i = 1 ; i <= num ; i++ ) {
			if ( num%i == 0 ) {
				ans.add(i);
			}
		}
		return ans;
	}
}