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求救我的递归程序 TLE...
谁能教我间单点的算法 当然时间要能通过
#include <iostream>
using namespace std;
const int N=100;
int b[2][N];
int cow,TS,TF,TA;
bool use[N];
bool DFS(int seat,int nTA,int nTS,int nTF)
{
int i;
if(nTS>0&&nTF>0&&nTA>TA)
TA=nTA;
if(nTA==0)
{
for(i=0;i<cow;i++)
if(!use[i])
{
use[i]=true;
DFS(i,nTA+b[0][i]+b[1][i],nTS+b[0][i],nTF+b[1][i]);
use[i]=false;
}
}
else
{
for(i=seat;i<cow;i++)
if(!use[i]&&nTA+b[0][i]+b[1][i]>nTA)
{
use[i]=true;
DFS(i,nTA+b[0][i]+b[1][i],nTS+b[0][i],nTF+b[1][i]);
use[i]=false;
}
}
return false;
}
int main()
{
int i;
cin>>cow;
memset(use,false,sizeof(use));
for(i=0;i<cow;i++)
{
cin>>b[0][i]>>b[1][i];
if(b[0][i]<=0&&b[1][i]<=0)
{
i--;
cow--;
}
}
TS=0,TF=0,TA=0;
DFS(0,0,0,0);
if(TA) cout<<TA<<endl;
else cout<<"0"<<endl;
return 0;
}
这是我的...
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