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23 lines
363 B
23 lines
363 B
#include <stdio.h>
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// #include "get_time.h"
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unsigned long int
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fib(unsigned long int n)
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{
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if (n <= 1) return n;
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return fib(n - 1) + fib(n - 2);
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}
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int
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main(int argc, char **argv)
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{
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unsigned long n = 0, r;
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scanf("%lu", &n);
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// unsigned long long st = get_time(), en;
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r = fib(n);
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// en = get_time();
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printf("%lu\n", r);
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// print_time(st, en);
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return 0;
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}
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