OJ-Problems-Source/QUSTOJ/1846_x7536110.cpp

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2016-10-12 11:26:08 +08:00
#include<cstdio>
#include<cstring>
#include<queue>
#include<algorithm>
using namespace std;
#define INF (1LL<<60)
#define MAXN 333
#define MAXM 3333*666
struct Edge{
int u,v,next;
long long cap,cost;
}edge[MAXM];
int head[MAXN];
int NV,NE,vs,vt;
void addEdge(int u,int v,long long cap,long long cost){
edge[NE].u=u; edge[NE].v=v; edge[NE].cap=cap; edge[NE].cost=cost;
edge[NE].next=head[u]; head[u]=NE++;
edge[NE].u=v; edge[NE].v=u; edge[NE].cap=0; edge[NE].cost=-cost;
edge[NE].next=head[v]; head[v]=NE++;
}
bool vis[MAXN];
long long dis[MAXN];
int pre[MAXN];
bool SPFA(){
for(int i=0; i<NV; ++i){
vis[i]=0;
dis[i]=INF;
}
vis[vs]=1;
dis[vs]=0;
queue<int> que;
que.push(vs);
while(!que.empty()){
int u=que.front(); que.pop();
for(int i=head[u]; i!=-1; i=edge[i].next){
int v=edge[i].v;
if(edge[i].cap && dis[v]>dis[u]+edge[i].cost){
dis[v]=dis[u]+edge[i].cost;
pre[v]=i;
if(!vis[v]){
vis[v]=1;
que.push(v);
}
}
}
vis[u]=0;
}
return dis[vt]!=INF;
}
long long MCMF(){
long long res=0;
while(SPFA()){
long long flow=INF,cost=0;
for(int u=vt; u!=vs; u=edge[pre[u]].u){
flow=min(flow,edge[pre[u]].cap);
}
for(int u=vt; u!=vs; u=edge[pre[u]].u){
edge[pre[u]].cap-=flow;
edge[pre[u]^1].cap+=flow;
cost+=flow*edge[pre[u]].cost;
}
res+=cost;
}
return res;
}
long long d[MAXN][MAXN];
long long gcd(long long a,long long b){
if(b==0) return a;
return gcd(b,a%b);
}
bool ok[MAXN][MAXN];
long long key[MAXN],val[MAXN];
int main(){
int t,n;
scanf("%d",&t);
while(t--){
scanf("%d",&n);
for(int i=1; i<=n; ++i){
scanf("%lld",key+i);
}
for(int i=1; i<=n; ++i){
scanf("%lld",val+i);
}
memset(ok,0,sizeof(ok));
for(int i=1; i<=n; ++i){
for(int j=i+1; j<=n; ++j){
if(gcd(key[i],key[j])==1) continue;
ok[i][j]=1;
ok[j][i]=1;
}
}
for(int i=1; i<=n; ++i){
for(int j=1; j<=n; ++j){
d[i][j]=-INF;
}
}
for(int len=2; len<=n; ++len){
for(int i=1; i+len-1<=n; ++i){
if(ok[i][i+len-1] && len==2){
d[i][i+len-1]=val[i]+val[i+len-1];
continue;
}
if(ok[i][i+len-1]) d[i][i+len-1]=max(d[i][i+len-1],val[i]+val[i+len-1]+d[i+1][i+len-1-1]);
for(int j=0; j<len-1; ++j){
d[i][i+len-1]=max(d[i][i+len-1],d[i][i+j]+d[i+j+1][i+len-1]);
}
}
}
long long ans=0;
vs=0; vt=n+2; NV=vt+1; NE=0;
memset(head,-1,sizeof(head));
addEdge(vs,1,1,0);
addEdge(n+1,vt,1,0);
for(int i=1; i<=n; ++i){
addEdge(i,i+1,INF,0);
}
for(int i=1; i<=n; ++i){
for(int j=i+1; j<=n; ++j){
if(d[i][j]!=-INF){
addEdge(i,j+1,1,-d[i][j]);
}
}
}
printf("%lld\n",-MCMF());
}
}