View Code of Problem 30
#include<iostream>
using namespace std;
int main()
{
int a;
cin >> a;
int sum = (1 + a)*a / 2;
cout << sum<<endl;
return 0;
}
|
Double click to view unformatted code.
Back to problem 30
#include<iostream>
using namespace std;
int main()
{
int a;
cin >> a;
int sum = (1 + a)*a / 2;
cout << sum<<endl;
return 0;
}
|
Double click to view unformatted code.