题解 | #尼科彻斯定理#
尼科彻斯定理
https://www.nowcoder.com/practice/dbace3a5b3c4480e86ee3277f3fe1e85
#include <stdio.h> int main() { int n; while (scanf("%d", &n) != EOF) { int ret = n * n - n + 1; printf("%d", ret); for (int i = 1; i < n; i++) { printf("+%d", ret + 2 * i); } } return 0; }