摘要：题目传送门 题意：求从区间[L,H]" role="presentation" style="position: relative;">[L,H][L,H]（L" role="presentation" style="position: relative;">LL和H... 阅读全文

摘要：题目链接 题意：求∑i=1n∑j=1nf(ij)" role="presentation" style="position: relative;">∑ni=1∑nj=1f(ij)∑i=1n∑j=1nf(ij)模1000000007" rol... 阅读全文

摘要：题目传送门 题意： 给定n" role="presentation" style="position: relative;">nn,m" role="presentation" style="position: relative;">mm,求1≤x&#... 阅读全文