import java.util.*;

public class CombinationLock {
	static final int DEGREE = 9 ; // (360 /40 = 9)
	
	public static void main(String[] args){
		String input = "1350 30 0 30\n" + 
					   "1620 20 0 20\n"+
					   "1620 27 7 27\n"+
					   "1890 10 0 10\n"+
					   "1197 11 19 15\n" +
					   "1620 10 30 10"; 					   
		Scanner s = new Scanner(input);
		while(s.hasNext()){
			int total = s.nextInt();
			int cmb1 = s.nextInt();
			int cmb2 = s.nextInt();
			int cmb3 = s.nextInt();
			int pos = process(cmb1,cmb2,cmb3,total);		
			System.out.println(pos);			
		}		
	}
	/*
	 * this method compute the total of degrees when rotating the lock.
	 * @param initial position of lock, comb1, comb2, and comb3
	 * @return the total degrees of rotation 
	 */
	public static int computeTotal(int initial, int cmb1, int cmb2, int cmb3){
		int total = 360 * 2;
		// initial --> combination1 (clock wise)
		int s = 0;
		if(initial >= cmb1){
			s= ( initial - cmb1) * 9;
		}else{
			s = ( 40 - (cmb1- initial)) * 9;
		}
		total += s;
		//combination 1 --> combination2 (counter clock wise)
		total += 360;
		if(cmb1 >= cmb2){
			s= ( 40 - Math.abs(cmb2- cmb1)) * 9;
		}else{			
			s= Math.abs( cmb1 - cmb2) * 9;
		}
		total+= s;
		//combination 2 --> combination3 (clock wise)
		if(cmb2 >= cmb3){
			s= ( cmb2 - cmb3) * 9;
		}else{
			s= ( 40 - (cmb3- cmb2)) * 9;
		}
		total+=s;
		return total;		
	}
	public static int process(int cmb1, int cmb2, int cmb3, int total){		
		total -= (3 * 360) ;
		total /=9;		
		int sub = ( 40 - cmb3 + cmb2) % 40 ;		
		total -= sub;		
		sub = (40 - cmb1 + cmb2) % 40;		
		total -= sub;
		return (total + cmb1) % 40;		
	}	
}