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set_vector.cpp
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68 lines (57 loc) · 1.44 KB
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#include <iostream>
#include <vector>
#include <set>
#include <numeric>
#include <chrono>
using namespace std;
using namespace std::chrono;
template <typename C>
int64_t sum(C& c)
{
int64_t sum = 0;
for (auto it=c.begin(); it!=c.end(); ++it)
sum += *it;
return sum;
}
int main(int argc, char const* argv[])
{
int const COUNT = 1000000;
vector<int64_t> v(COUNT);
set<int64_t> s;
for (int64_t i=0; i<COUNT; i++) v[i] = i;
for (int64_t i=0; i<COUNT; i++) s.insert(i);
// sum using set
{
auto start = system_clock::now();
cout << "sum : " << sum(s) << endl;
auto stop = system_clock::now();
auto elapsed = (stop - start);
cout << elapsed.count() << endl;
}
// sum using vector
{
auto start = system_clock::now();
cout << "sum : " << sum(v) << endl;
auto stop = system_clock::now();
auto elapsed = (stop - start);
cout << elapsed.count() << endl;
}
auto x = [=](int64_t so_far, int64_t v) { return so_far + v; };
// accumulate set
{
auto start = system_clock::now();
cout << "sum : " << accumulate(s.begin(), s.end(), 0LL, x) << endl;
auto stop = system_clock::now();
auto elapsed = (stop - start);
cout << elapsed.count() << endl;
}
// accumulate vector
{
auto start = system_clock::now();
cout << "sum : " << accumulate(v.begin(), v.end(), 0LL, x) << endl;
auto stop = system_clock::now();
auto elapsed = (stop - start);
cout << elapsed.count() << endl;
}
return 0;
}