private static b a(b b1) {
int ai[] = b1.d();
int ai1[] = b1.e();
if (ai == null || ai1 == null) {
throw m.a();
}
int l = a(ai, b1);
int i1 = ai[1];
int i = ai1[1];
int j1 = ai[0];
int k1 = ((ai1[0] - j1) + 1) / l;
int l1 = ((i - i1) + 1) / l;
if (k1 <= 0 || l1 <= 0) {
throw m.a();
}
int i2 = l / 2;
b b2 = new b(k1, l1);
for (int j = 0; j < l1; j++) {
for (int k = 0; k < k1; k++) {
if (b1.a(k * l + (j1 + i2), i1 + i2 + j * l)) {
b2.b(k, j);
}
}
}
return b2;
}
private static int a(int ai[], b b1) {
int j = b1.f();
int i = ai[0];
for (int k = ai[1]; i < j && b1.a(i, k); i++) {}
if (i == j) {
throw m.a();
}
i -= ai[0];
if (i == 0) {
throw m.a();
} else {
return i;
}
}