juanplopes

public class Main {
    private static boolean trySet(String input, int i, char[] data, boolean[] v, boolean[] h, boolean[] c, int value) {
        int vv = i % 9 * 9, hh = i / 9 * 9, cc = (i / 27 * 3 + i % 9 / 3) * 9;

        if (v[vv + value] || h[hh + value] || c[cc + value]) return false;

        data[i] = (char) (value + '1');

        v[vv + value] = h[hh + value] = c[cc + value] = true;
        if (solveInternal(input, i + 1, data, v, h, c))

klauswuestefeld

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