https://blog.csdn.net/csyifanZhang/article/details/105623224?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522159055038919725247648133%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fblog.%2522%257D&request_id=159055038919725247648133&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~blog~first_rank_v2~rank_v25-11-105623224.nonecase&utm_term=%E6%A8%A1

↑模运算规律总结

	int n;
	while (cin >> n) 
		cout << int(pow((n % 3), 5)) % 3 << endl;