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#include <immintrin.h>
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#include <math.h>
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void prefix_sum_sequential(double *out, const double *in, int N) {
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out[0] = in[0];
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for (int i = 1; i < N; ++i) {
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out[i] = in[i] + out[i - 1];
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}
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}
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void prefix_sum_parallel(double *out, const double *in, int N) {
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// TODO: FILL_IN_HERE
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}
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