17 lines
270 B
C++
17 lines
270 B
C++
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#include <functional>
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using namespace std;
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double fib(double n)
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{
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if(n < 0)
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throw "Invalid argument";
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function<double(double)> actual_fib = [&](double n)
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{
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if(n < 2) return n;
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return actual_fib(n-1) + actual_fib(n-2);
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};
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return actual_fib(n);
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}
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