记录编号 |
194767 |
评测结果 |
AAAAAAAAAA |
题目名称 |
[网络流24题] 太空飞行计划 |
最终得分 |
100 |
用户昵称 |
四季木哥 |
是否通过 |
通过 |
代码语言 |
C++ |
运行时间 |
0.003 s |
提交时间 |
2015-10-17 11:10:16 |
内存使用 |
0.32 MiB |
显示代码纯文本
#include<iostream>
#include<cstdio>
#include<cstring>
#include<vector>
#include<queue>
#define INF 0x3f3f3f3f
#define N 250
using namespace std;
struct EDGE{
int from,to,cap,flow;
};
int m,n;
vector<EDGE> edges;
vector<int> G[N];
bool vis[N];
int cur[N],d[N];
int s,t;
void Add_Edge(int from,int to,int cap){
edges.push_back((EDGE){from,to,cap,0});
edges.push_back((EDGE){to,from,0,0});
int siz=edges.size();
G[from].push_back(siz-2);
G[to].push_back(siz-1);
}
bool BFS(){
memset(vis,0,sizeof(vis));
memset(d,0,sizeof(d));
queue<int> q;
q.push(s);
vis[s]=1;
while(!q.empty()){
int x=q.front();
q.pop();
for(int i=0;i<G[x].size();i++){
EDGE e=edges[G[x][i]];
if(!vis[e.to]&&e.cap>e.flow){
q.push(e.to);
vis[e.to]=1;
d[e.to]=d[x]+1;
}
}
}
return vis[t];
}
int DFS(int x,int rest){
if(x==t||rest==0) return rest;
int flow=0,f;
for(int& i=cur[x];i<G[x].size();i++){
EDGE& e=edges[G[x][i]];
if(d[x]+1==d[e.to]){
f=DFS(e.to,min(rest,e.cap-e.flow));
if(f>0){
e.flow+=f;
edges[G[x][i]^1].cap+=f;
flow+=f;
rest-=f;
if(rest==0) return flow;
}
}
}
return flow;
}
int Maxflow(){
int flow=0;
while(BFS()){
memset(cur,0,sizeof(cur));
flow+=DFS(s,INF);
}
return flow;
}
int main(){
freopen("shuttle.in","r",stdin);
freopen("shuttle.out","w",stdout);
cin>>m>>n;
int p,x;
char y;
s=0,t=m+n+1;
int sum=0;
for(int i=1;i<=m;i++){
cin>>p;
sum+=p;
Add_Edge(s,i,p);
while(scanf("%d%c",&x,&y)){
Add_Edge(i,x+m,INF);
if(y=='\r') break;
}
}
for(int i=1;i<=n;i++){
cin>>p;
Add_Edge(i+m,t,p);
}
int ans=sum-Maxflow();
for(int i=1;i<=m;i++)
if(vis[i]) cout<<i<<" ";
cout<<endl;
for(int i=m+1;i<=m+n;i++)
if(vis[i]) cout<<i-m<<" ";
cout<<endl;
cout<<ans;
return 0;
}