题解 | #小乐乐求和#
小乐乐求和
https://www.nowcoder.com/practice/ce0b2eacd3d04647831358c2876e44ff
#include<stdio.h>
int main()
{
long long int n,sum=0;
scanf("%lld",&n);
for(int i=1;i<=n;i++){
sum+=i;
}
printf("%lld",sum);
return 0;
}
