31 lines
1000 B
Java
31 lines
1000 B
Java
public class PermutationTest {
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private static final int[] data = new int[]{
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85, 88, 75, 66, 25, 29, 83, 39, 97,
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68, 41, 10, 49, 16, 65, 32, 92, 28, 98
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};
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private static int pick(int at, int remain, int accu, int treat) {
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if (remain == 0) return (accu > treat) ? 1 : 0;
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return pick(at - 1, remain - 1, accu + data[at - 1], treat)
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+ ((at > remain) ? pick(at - 1, remain, accu, treat) : 0);
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}
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public static void main(String[] args) {
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int treat = 0;
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double total = 1.0;
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for (int i = 0; i <= 8; ++i) {
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treat += data[i];
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}
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for (int i = 19; i >= 11; --i) {
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total *= i;
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}
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for (int i = 9; i >= 1; --i) {
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total /= i;
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}
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int gt = pick(19, 9, 0, treat);
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int le = (int) (total - gt);
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System.out.printf("<= : %f%% %d\n", 100.0 * le / total, le);
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System.out.printf(" > : %f%% %d\n", 100.0 * gt / total, gt);
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}
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}
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