题解 | #尼科彻斯定理#

#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;
                if (i!=m-1)
                 printf("%d+", a[i]);
                 else
                  printf("%d\n",a[i]);
            }
        }
    }
    return 0;
}