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题解 | 牛牛学数列

#include <stdio.h> int main() { int n; scanf("%d", &n); int Sn; if (n % 2 == 0) { Sn = -n / 2; } el...

2026-04-11

0 14

题解 | 牛牛学数列4

#include <stdio.h> int main() { int n; scanf("%d", &n); int ret = n * (n + 1) * (n + 2) / 6; printf("%d\n&q...

2026-04-09

0 22

题解 | 牛牛学数列4

#include <stdio.h> int main() { int n; scanf("%d", &n); int total = 0; int term = 0; //用于存储当前项 for (int i = ...

2026-04-09

0 20

题解 | 牛牛学数列4

#include <stdio.h> //计算第m个三角数 int tri(int m) { if (m == 1) { return 1; } else if (m >= 2) { return tri(m - 1) + m; ...

2026-04-09

0 19