题解 | 小乐乐求和
小乐乐求和
https://www.nowcoder.com/practice/ce0b2eacd3d04647831358c2876e44ff?tpId=383&tags=&title=&difficulty=0&judgeStatus=0&rp=0&sourceUrl=%2Fexam%2Foj%3FquestionJobId%3D10%26subTabName%3Donline_coding_page
#include <bits/stdc++.h>
using namespace std;
int main(){
long long n,sum=0;
cin>>n;
for(long long i=1;i<=n;i++){
sum+=i;
}
cout<<sum<<endl;
return 0;
}
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