static int runTestCase(int casenum__) {
		switch (casenum__) {
		case 0: {
			int[] population = { 2, 3, 4 };
			int expected__ = 2;

			return verifyCase(casenum__, expected__, new SlimeXSlimesCity().merge(population));
		}
		case 1: {
			int[] population = { 1, 2, 3 };
			int expected__ = 2;

			return verifyCase(casenum__, expected__, new SlimeXSlimesCity().merge(population));
		}
		case 2: {
			int[] population = { 8, 2, 3, 8 };
			int expected__ = 2;

			return verifyCase(casenum__, expected__, new SlimeXSlimesCity().merge(population));
		}
		case 3: {
			int[] population = { 1000000000, 999999999, 999999998, 999999997 };
			int expected__ = 3;

			return verifyCase(casenum__, expected__, new SlimeXSlimesCity().merge(population));
		}
		case 4: {
			int[] population = { 1, 1, 1 };
			int expected__ = 3;

			return verifyCase(casenum__, expected__, new SlimeXSlimesCity().merge(population));
		}
		case 5: {
			int[] population = { 1, 2, 4, 6, 14, 16, 20 };
			int expected__ = 3;

			return verifyCase(casenum__, expected__, new SlimeXSlimesCity().merge(population));
		}

		// custom cases

		/*
		 * case 6: {
		 * int[] population = ;
		 * int expected__ = ;
		 *
		 * return verifyCase(casenum__, expected__, new
		 * SlimeXSlimesCity().merge(population));
		 * }
		 */
		/*
		 * case 7: {
		 * int[] population = ;
		 * int expected__ = ;
		 *
		 * return verifyCase(casenum__, expected__, new
		 * SlimeXSlimesCity().merge(population));
		 * }
		 */
		/*
		 * case 8: {
		 * int[] population = ;
		 * int expected__ = ;
		 *
		 * return verifyCase(casenum__, expected__, new
		 * SlimeXSlimesCity().merge(population));
		 * }
		 */
		default:
			return -1;
		}
	}