题解 | 小乐乐求和
小乐乐求和
https://www.nowcoder.com/practice/ce0b2eacd3d04647831358c2876e44ff
#include <iostream>
using namespace std;
int main()
{
int a = 0;
cin>>a;
long long sum = 0;
int b = 1;
while(a)
{
sum+=b;
b+=1;
a-=1;
}
cout<<sum<<endl;
return 0;
}
