2245: [SDOI2011]工作安排 费用流

为什么SDOI原来都是考裸题。。qwq
直接根据题意连边跑费用流。。

#include<iostream>
#include<cstdio>
#include<cstring>
#define inf 1000000007
#define M 505
#define ll long long 
using namespace std;
ll ans;
int n,m,T,cnt=1;
int head[505],dis[505],q[505],path[505],t[205],w[205];
int next[130005],list[130005],from[130005],flow[130005],cost[130005];
bool vis[505];
inline int read()
{
    int a=0,f=1; char c=getchar();
    while (c<'0'||c>'9') {if (c=='-') f=-1; c=getchar();}
    while (c>='0'&&c<='9') {a=a*10+c-'0'; c=getchar();}
    return a*f;
}
inline void insert(int x,int y,int z,int w)
{
    next[++cnt]=head[x];
    head[x]=cnt;
    from[cnt]=x;
    list[cnt]=y;
    flow[cnt]=z;
    cost[cnt]=w;
}
inline bool spfa()
{
    for (int i=0;i<=T;i++) dis[i]=inf;
    dis[0]=0; vis[0]=1; q[1]=0;
    int t=0,w=1,x;
    while (t!=w)
    {
        t=(t+1)%M;
        x=q[t];
        for (int i=head[x];i;i=next[i])
            if (flow[i]&&dis[list[i]]>dis[x]+cost[i])
            {
                dis[list[i]]=dis[x]+cost[i];
                path[list[i]]=i;
                if (!vis[list[i]])
                {
                    vis[list[i]]=1;
                    w=(w+1)%M;
                    q[w]=list[i];
                }
            }
        vis[x]=0;
    }
    return dis[T]!=inf;
}
inline void mcf()
{
    int x=inf;
    for (int i=path[T];i;i=path[from[i]]) x=min(x,flow[i]);
    for (int i=path[T];i;i=path[from[i]])
        ans+=x*cost[i],flow[i]-=x,flow[i^1]+=x;
}
int main()
{
    m=read(); n=read(); T=n+m+1;
    for (int i=1;i<=n;i++) 
    {
        int x=read();
        insert(0,i,x,0); insert(i,0,0,0);
    }
    for (int i=1;i<=m;i++)
        for (int j=1;j<=n;j++)
        {
            int x=read();
            if (x) insert(j,n+i,inf,0),insert(n+i,j,0,0);
        }
    for (int i=1;i<=m;i++)
    {
        int s=read();
        for (int j=1;j<=s;j++) t[j]=read();
        t[++s]=inf;
        for (int j=1;j<=s;j++) w[j]=read();
        for (int j=1;j<=s;j++)
            insert(n+i,T,t[j]-t[j-1],w[j]),insert(T,n+i,0,-w[j]);
    }
    while (spfa()) mcf();
    cout << ans << endl;
    return 0;
}