题解 | #牛牛的西格玛#
牛牛的西格玛
https://www.nowcoder.com/practice/c6b750ee8853484f8dbf14b9531b501f
#include <stdio.h>
int main() {
int n = 0;
while (1 == scanf("%d", &n))
{
int sum = 0;
while (n)
{
sum += n;
n--;
}
printf("%d\n", sum);
}
return 0;
}
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