摘要: #include<bits/stdc++.h> #define ll long long #define N 17 using namespace std; ll a,b,num[N],s[N],f[N],ans[10][2]; //1~9在0~9中出现1次,0~99中出现20次,0~999中出现3 阅读全文
posted @ 2020-07-18 21:24 Mistletoes 阅读(130) 评论(0) 推荐(0) 编辑