33 lines
698 B
C
33 lines
698 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <gmp.h>
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int main(int argc, char **argv)
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{
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double elapsed;
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struct timespec start, end;
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mpz_t count, tmp;
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clock_gettime(CLOCK_MONOTONIC, &start);
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mpz_inits(count, tmp, NULL);
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mpz_fac_ui(count, 40);
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mpz_fac_ui(tmp, 20);
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mpz_mul(tmp, tmp, tmp);
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mpz_tdiv_q(count, count, tmp);
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clock_gettime(CLOCK_MONOTONIC, &end);
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elapsed = (end.tv_sec - start.tv_sec) + (double)(end.tv_nsec - start.tv_nsec) / 1000000000;
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printf("Project Euler, Problem 15\n");
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gmp_printf("Answer: %Zd\n", count);
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printf("Elapsed time: %.9lf seconds\n", elapsed);
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mpz_clears(count, tmp, NULL);
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return 0;
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}
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