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Pushing everything again, accidentally deleted my remote repository

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jakob.schratter 2025-12-09 22:06:13 +01:00
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ex5/ex5_3/main.cpp Normal file
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#include "goldbach.h"
#include <algorithm>
#include <iostream>
#include <omp.h>
using namespace std;
int main()
{
cout << "Check: 694 has "<< single_goldbach(694) << " decompositions." << endl << "----------------------------------------" << endl;
for(size_t n : {10000, 100000, 400000, 1000000, 2000000})
{
double t_start = omp_get_wtime();
auto goldbach_vector = count_goldbach(n);
auto max_it = max_element(goldbach_vector.begin(), goldbach_vector.end());
size_t max_number = distance(goldbach_vector.begin(), max_it);
double t_end = omp_get_wtime() - t_start;
cout << "The number " << max_number << " has " << *max_it << " decompositions. Duration: " << t_end << endl;
}
/*
###### WITHOUT PARALLELIZATION ######
The number 9240 has 329 decompositions. Duration: 0.00307696
The number 99330 has 2168 decompositions. Duration: 0.189839
The number 390390 has 7094 decompositions. Duration: 1.3042
The number 990990 has 15594 decompositions. Duration: 5.45034
The number 1981980 has 27988 decompositions. Duration: 47.1807
###### WITH PARALLELIZATION ######
The number 9240 has 329 decompositions. Duration: 0.000734854
The number 99330 has 2168 decompositions. Duration: 0.0251322
The number 390390 has 7094 decompositions. Duration: 0.487375
The number 990990 has 15594 decompositions. Duration: 6.16972
The number 1981980 has 27988 decompositions. Duration: 31.5699
*/
return 0;
}