OJ-Problems-Source/HDOJ/2167_autoAC.cpp

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#include <iostream>
#include <sstream>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <string>
#include <queue>
#include <algorithm>
#include <map>
#include <cmath>
#include <iomanip>
#define INF 99999999
typedef long long LL;
using namespace std;
const int MAX=1597+10;
int n,nowsize,size;
int dp[MAX],temp[MAX],ans[MAX],now[MAX];
int w[16][16],head[MAX];
char s[MAX];
struct Edge{
int v,next;
Edge(){}
Edge(int V,int NEXT):v(V),next(NEXT){}
}edge[MAX*MAX/2];
void Init(int N){
n=N;
memset(dp,0,sizeof dp);
memset(temp,0,sizeof temp);
memset(head,-1,sizeof head);
size=nowsize=0;
}
void InsertEdge(int u,int v){
edge[size]=Edge(v,head[u]);
head[u]=size++;
}
void dfs(int k,int p){
if(k>=n){now[++nowsize]=p;return;}
dfs(k+2,p|(1<<k));
dfs(k+1,p);
}
int cal(int k,int p){
int sum=0;
for(int i=0;i<15;++i){
if(p & (1<<i))sum+=w[k][i];
}
return sum;
}
void DP(){
dfs(0,0);
for(int i=1;i<=nowsize;++i){
for(int j=i+1;j<=nowsize;++j){
if(now[i] & now[j])continue;
if(now[i] & (now[j]<<1))continue;
if(now[i] & (now[j]>>1))continue;
InsertEdge(i,j);
InsertEdge(j,i);
}
}
for(int k=1;k<=n;++k){
for(int i=1;i<=nowsize;++i){
ans[i]=cal(k,now[i]);
for(int j=head[i];j != -1;j=edge[j].next){
dp[i]=max(dp[i],temp[edge[j].v]+ans[i]);
}
}
for(int i=1;i<=nowsize;++i)temp[i]=dp[i],dp[i]=0;
}
}
int main(){
int k;
while(gets(s)){
k=1;
do{
n=0;
stringstream ss(s);
while(ss>>w[k][n])++n;
gets(s);
if(s[0] == '\0')break;
++k;
}while(true);
Init(k);
DP();
int sum=0;
for(int i=1;i<=nowsize;++i)sum=max(sum,temp[i]);
printf("%d\n",sum);
}
return 0;
}