27 lines
536 B
Text
27 lines
536 B
Text
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int binary_gcd (int x, int y) {
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if (x == y) { return x; }
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if (x == 0) { return y; }
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if (y == 0) { return x; }
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if ((~x [&] 1) == 1) {
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if ((y [&] 1) == 1) {
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return binary_gcd(x >> 1, y);
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}
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else {
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return binary_gcd(x >> 1, y >> 1) << 1;
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}
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}
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if ((~y [&] 1) == 1) {
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return binary_gcd(x, y >> 1);
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}
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if (x > y) {
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return binary_gcd((x - y) >> 1, y);
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}
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return binary_gcd((y - x) >> 1, x);
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}
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int program (int argc, string[] argv) {
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var x = 21;
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var y = 15;
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return binary_gcd(x, y);
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}
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