20 lines
359 B
C++
20 lines
359 B
C++
|
#include <memory>
|
||
|
|
#include <numeric>
|
||
|
|
#include <iostream>
|
||
|
|
|
||
|
|
using namespace std;
|
||
|
|
|
||
|
|
int main() {
|
||
|
|
int size;
|
||
|
|
cin >> size;
|
||
|
|
|
||
|
|
unique_ptr<double[]> arr(new double[size]);
|
||
|
|
for(int index = 0; index < size; index++)
|
||
|
|
arr[index] = index + 1;
|
||
|
|
|
||
|
|
double sum = accumulate(arr.get(), arr.get()+size, 0.0);
|
||
|
|
cout << sum << endl;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|