USACO09OPEN Cow Digit Game 发表于 2018-08-04 | 分类于 USACO | 0 字数统计: 217 字 题目地址 题解很标准的博弈论递推。1234567891011121314151617181920212223242526272829303132333435363738394041#include <cstdio>#include <cstdlib>#include <algorithm>#include <cstring>#include <cctype>#define INF 2000000000using namespace std;typedef long long ll;int read(){ int f=1,x=0;char c=getchar(); while(c<'0'||c>'9'){if(c=='-')f=-f;c=getchar();} while(c>='0'&&c<='9')x=x*10+c-'0',c=getchar(); return f*x; }bool sg[1000005];void init(){ sg[0]=0; int bit[9]={0},maxi,mini,len=1; for(int i=1;i<=1000000;i++){ bit[0]++; for(int j=0;bit[j]==10&&j<len;j++) bit[j]=0,bit[j+1]++; if(bit[len])len++; mini=10,maxi=0; for(int j=0;j<len;j++){ if(bit[j]>maxi)maxi=bit[j]; if(bit[j]<mini&&bit[j])mini=bit[j]; } if(!sg[i-maxi]||!sg[i-mini])sg[i]=1; }}void solve(){ int T=read(),n; while(T--) n=read(),printf("%s\n",sg[n]?"YES":"NO");}int main(){ init(); solve(); return 0;}
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