OJ-Problems-Source/HDOJ/4212_autoAC.cpp

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#include <iostream>
#include <vector>
#include <set>
#include<cstdio>
using namespace std;
vector<int> a[23];
int ans,nn;
int b[22];
int tp=1<<22;
void init()
{
for(int i=1;i<tp;i++)
{
int tmp=i;
int k=0;
int sum=0;
while(tmp)
{
++k;
if(tmp&1)
{
sum+=k;
if(sum>22) break;
}
tmp>>=1;
}
if(!tmp) a[sum].push_back(i);
}
}
inline int total_one(int p)
{
int c=0;
while(p)
{
p&=p-1;
c++;
}
return c;
}
int main()
{
int T=0;
int n,m;
init();
while(scanf("%d%d",&n,&m)!=EOF)
{
if(n+m==0) break;
nn=1<<n;
++T;
for(int i=0;i<m;i++)
{
scanf("%d",&b[i]);
}
ans=0;
set<int> now;
now.insert(0);
for(int i=0;i<m;i++)
{
set<int> next;
for(set<int>::iterator it=now.begin();it!=now.end();it++)
{
int temp=a[b[i]].size();
int sign=0;
int tmp=*it;
for(int j=0;j<temp;j++)
{
if(a[b[i]][j]>=nn) continue;
if((tmp & a[b[i]][j]) ==0)
{
sign=1;
next.insert(tmp | a[b[i]][j]);
}
}
if(!sign)
{
int _tmp=total_one(tmp);
ans=ans>_tmp?ans:_tmp;
}
}
now=next;
if(now.size()==0) break;
}
for(set<int>::iterator it=now.begin();it!=now.end();it++)
{
int _tmp=total_one(*it);
ans=ans>_tmp?ans:_tmp;
}
printf("Game %d: %d\n",T,ans);
}
return 0;
}