摘要：
题目 City C is really a nightmare of all drivers for its traffic jams. To solve the traffic problem, the mayor plans to build a RTQS (Real Time Query Sy 阅读全文
摘要：
题目 B君和G君聊天的时候想到了如下的问题。 给定自然数l和r ,选取2个整数$x,y$满足$l int main() { int t; scanf("%d", &t); while (t ) { long long a, b, ans = 0; scanf("%lld%lld", &a, &b); 阅读全文