38 lines
698 B
C
38 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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int main(int argc, char **argv)
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{
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int fib0 = 1, fib1 = 2, fib2, sum = 2;
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double elapsed;
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struct timespec start, end;
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clock_gettime(CLOCK_MONOTONIC, &start);
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fib2 = fib0 + fib1;
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while(fib2 <= 4000000)
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{
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if(fib2 % 2 == 0)
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{
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sum += fib2;
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}
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fib0 = fib1;
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fib1 = fib2;
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fib2 = fib0 + fib1;
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}
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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 2\n");
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printf("Answer: %d\n", sum);
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printf("Elapsed time: %.9lf seconds\n", elapsed);
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return 0;
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}
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