摘要: ```cpp include typedef long long ll; using namespace std; const int maxn=1e6+50; const ll mod=1e9+7; int a[maxn],b[maxn]; vectorG[maxn]; ll dp[maxn][2 阅读全文
posted @ 2019-08-14 18:18 luowentao 阅读(328) 评论(0) 推荐(0) 编辑