自己写的。C语言。等差数列,扬辉三角。题解 | #等差数列#
等差数列
https://www.nowcoder.com/practice/f792cb014ed0474fb8f53389e7d9c07f
#include<stdio.h>
int main() {
    int n;
    scanf("%d", &n);
    printf("%d\n", n * 2 + n * (n - 1) / 2 * 3);
    return 0;
}
等差数列
https://www.nowcoder.com/practice/f792cb014ed0474fb8f53389e7d9c07f
#include<stdio.h>
int main() {
    int n;
    scanf("%d", &n);
    printf("%d\n", n * 2 + n * (n - 1) / 2 * 3);
    return 0;
}
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