题解 | #杨辉三角的变形#
杨辉三角的变形
https://www.nowcoder.com/practice/8ef655edf42d4e08b44be4d777edbf43
#include <stdio.h> #include <string.h> int main() { int n; scanf("%d", &n); if (n <= 2) printf("-1\n"); else { n = n - 2; int j = n % 4; switch (j) { case 1: printf("2\n"); break; case 2: printf("3\n"); break; case 3: printf("2\n"); break; case 0: printf("4\n"); break; } } return 0; }