【HDU3032】Nim or not Nim?(博弈论)
【HDU3032】Nim or not Nim?(博弈论)
题面
题解
\(Multi-SG\)模板题
#include<iostream>
#include<cstdio>
using namespace std;
inline int read()
{
int x=0;bool t=false;char ch=getchar();
while((ch<'0'||ch>'9')&&ch!='-')ch=getchar();
if(ch=='-')t=true,ch=getchar();
while(ch<='9'&&ch>='0')x=x*10+ch-48,ch=getchar();
return t?-x:x;
}
int SG(int x)
{
if(x%4==0)return x-1;
if(x%4==1)return x;
if(x%4==2)return x;
if(x%4==3)return x+1;
}
int main()
{
int T=read();
while(T--)
{
int n=read(),s=0;
while(n--)s^=SG(read());
puts(s?"Alice":"Bob");
}
return 0;
}