#include <stdio.h> //重点：把等差数列的首项找到 int main() { int m, first_num,i; int a[100]={0}; while (scanf("%d", &m) != EOF) { if (m>=1&&m<=100){ first_num=m*(m-1)+1; for (i=0; i<m; i++){ a[i]=first_num+2*i; ...
