摘要:
"题目链接" ; solution: 根据画图模拟可以知道除第一次纯下降 其余每次都是一半一半的增加 S=h+h+h/2+h/4+h/8+...; 即S=h+2h=3h cpp include using namespace std; const int mod=1e9+7; long long a 阅读全文
摘要:
I COOL i like sky i like sunshine i do picnic in spring with happy and laughing the good day is Monday is a beautiful beginning of every week i wanna 阅读全文
摘要:
大脚好, 关于篮球暂时不更,心血来潮在更 阅读全文