import org.junit.Test;
import static org.junit.Assert.*;

public class Sample180 {
	public int modular(int n, int low, int high) {
		int count = (high - low + 1);
		int res = n % count;
		while (res < 0) {
			res += count;
		}
		return res + low;
	}

	@Test
	public void testModular() {
		assertEquals(100, modular(0, 100, 200));
		assertEquals(150, modular(50, 100, 200));
		assertEquals(200, modular(100, 100, 200));

		assertEquals(100, modular(101, 100, 200));
		assertEquals(200, modular(-1, 100, 200));
		assertEquals(-4, modular(1, -5, 200));
		assertEquals(-5, modular(-500, -5, -1));
	}
}