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 n = 0;
scanf("%lld", &n);
long long ret = 0;
long long i = 1;
while (i <= n)
{
ret += i;
i++;
}
printf("%lld", ret);
return 0;
}
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