static int runTestCase(int casenum) {
		switch (casenum) {
		case 0: {
			int[] heights = { 9, 5, 11 };
			int expected__ = 3;

			return verifyCase(casenum, expected__, new KingdomAndTrees().minLevel(heights));
		}
		case 1: {
			int[] heights = { 5, 8 };
			int expected__ = 0;

			return verifyCase(casenum, expected__, new KingdomAndTrees().minLevel(heights));
		}
		case 2: {
			int[] heights = { 1, 1, 1, 1, 1 };
			int expected__ = 4;

			return verifyCase(casenum, expected__, new KingdomAndTrees().minLevel(heights));
		}
		case 3: {
			int[] heights = { 548, 47, 58, 250, 2012 };
			int expected__ = 251;

			return verifyCase(casenum, expected__, new KingdomAndTrees().minLevel(heights));
		}

		// custom cases

		/*
		 * case 4: {
		 * int[] heights = ;
		 * int expected__ = ;
		 *
		 * return verifyCase(casenum, expected__, new
		 * KingdomAndTrees().minLevel(heights));
		 * }
		 */
		/*
		 * case 5: {
		 * int[] heights = ;
		 * int expected__ = ;
		 *
		 * return verifyCase(casenum, expected__, new
		 * KingdomAndTrees().minLevel(heights));
		 * }
		 */
		/*
		 * case 6: {
		 * int[] heights = ;
		 * int expected__ = ;
		 *
		 * return verifyCase(casenum, expected__, new
		 * KingdomAndTrees().minLevel(heights));
		 * }
		 */
		default:
			return -1;
		}
	}