001package state.one;
002
003interface I {
004        public int f();
005        public int g();
006        public void changeDirection();
007}
008
009class C implements I {
010        private boolean state;
011        private int i;
012        private int j;
013        public int f() {
014                if (state)
015                        i += 26;
016                else
017                        i -= 32;
018                return i;
019        }
020        public int g() {
021                if (state)
022                        j += 42;
023                else
024                        j -= 27;
025                return j;
026        }
027        public void changeDirection() {
028                state = !state;
029        }
030}