static int runTestCase(int casenum) {
		switch (casenum) {
		case 0: {
			int[] duckTypes = { 5, 8 };
			int expected__ = 2;

			return verifyCase(casenum, expected__, new KingdomAndDucks().minDucks(duckTypes));
		}
		case 1: {
			int[] duckTypes = { 4, 7, 4, 7, 4 };
			int expected__ = 6;

			return verifyCase(casenum, expected__, new KingdomAndDucks().minDucks(duckTypes));
		}
		case 2: {
			int[] duckTypes = { 17, 17, 19, 23, 23, 19, 19, 17, 17 };
			int expected__ = 12;

			return verifyCase(casenum, expected__, new KingdomAndDucks().minDucks(duckTypes));
		}
		case 3: {
			int[] duckTypes = { 50 };
			int expected__ = 1;

			return verifyCase(casenum, expected__, new KingdomAndDucks().minDucks(duckTypes));
		}
		case 4: {
			int[] duckTypes = { 10, 10, 10, 10, 10 };
			int expected__ = 5;

			return verifyCase(casenum, expected__, new KingdomAndDucks().minDucks(duckTypes));
		}

		// custom cases

		/*
		 * case 5: {
		 * int[] duckTypes = ;
		 * int expected__ = ;
		 *
		 * return verifyCase(casenum, expected__, new
		 * KingdomAndDucks().minDucks(duckTypes));
		 * }
		 */
		/*
		 * case 6: {
		 * int[] duckTypes = ;
		 * int expected__ = ;
		 *
		 * return verifyCase(casenum, expected__, new
		 * KingdomAndDucks().minDucks(duckTypes));
		 * }
		 */
		/*
		 * case 7: {
		 * int[] duckTypes = ;
		 * int expected__ = ;
		 *
		 * return verifyCase(casenum, expected__, new
		 * KingdomAndDucks().minDucks(duckTypes));
		 * }
		 */
		default:
			return -1;
		}
	}