58,452
社区成员




import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
long n = sc.nextInt();//人数栋栋和n个同学
long k = sc.nextInt();//界限,数到该数则下一个数从0开始
long t = sc.nextInt();//栋栋本人说了几个数
long dd=1;//栋栋本人说了几个数和
long sum=1;
long count=1;
while(t>1){
sum=sum+n*count+n*(n-1)/2;//sum累加
dd+=sum%k;
count+=n;
t--;
}
System.out.println(dd);
}
}