简单数学题 Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 580 Accepted Submission(s): 257 Problem Description 已知 F(n)=∑i=1n(i×∑j=inCij) 求 F(n) mod 1000000007 Input 多组输入,每组输入占一行,包含一个整数n(1 <= n <…
免费送气球 Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 581 Accepted Submission(s): 130 Problem Description 又到了GDUT一年一度的程序设计竞赛校赛的时间啦.同学们只要参加校赛,并且每解出一道题目就可以免费获得由ACM协会和集训队送出的气球一个.听到这个消息,JMC也想参加免费…
超级无敌简单题 Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 570 Accepted Submission(s): 274 Problem Description 通常来说,题面短的题目一般都比较难,所以我要把题面写得很长很长.通常来说,题面短的题目一般都比较难,所以我要把题面写得很长很长.通常来说,题面短的题目一般都比较难,所…