【题解】[牛客OI周赛2-提高组]C.好朋友 数位DP

#include<cstdio> #include<cstring> #include<algorithm> using namespace std; template<typename tp>inline void read(tp&x) { x=0;int f=0;char ch=getchar(); while(ch<'0'||ch>'9')f|=ch=='-',ch=getchar();

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