11 lines
292 B
Java
11 lines
292 B
Java
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public static long fib(int n) {
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if (n < 0)
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throw new IllegalArgumentException("n can not be a negative number");
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return new Object() {
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private long fibInner(int n) {
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return (n < 2) ? n : (fibInner(n - 1) + fibInner(n - 2));
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}
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}.fibInner(n);
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}
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