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#include <stdlib.h>
#include <stdio.h>
extern int fib(int);
int main(int argc, char ** argv)
{
int n, r;
if (argc >= 2) n = atoi(argv[1]); else n = 30;
r = fib(n);
printf("fib(%d) = %d\n", n, r);
return 0;
}
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