题解 | #牛牛学数列4#
牛牛学数列4
https://www.nowcoder.com/practice/586b114f52034688879342ba45779081
#include <stdio.h>
int main() {
int n = 0;
scanf("%d", &n);
int i = 0;
int sum = 0;
int j = 0;
for (i = 1; i <= n; i++) {
for (j = 1; j <= i; j++) {
sum += j;
}
}
printf("%d", sum);
return 0;
}
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