OJ-Problems-Source/HDOJ/4975_autoAC.cpp

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#include<cstdio>
#include<cstring>
#include<iostream>
#include<queue>
using namespace std;
const int inf=1<<29;
const int maxn=1100;
const int maxm=6e5;
struct Edge
{
int u;
int v;
int f;
int nxt;
Edge(){}
Edge(int su,int sv,int sf,int snxt):u(su),v(sv),f(sf),nxt(snxt){}
}E[maxm];
int n,m,row[510],col[510],sumr,sumc;
int e,st,des,head[maxn],level[maxn];
bool vis[maxn];
int q[maxn];
void AddEdge(int u,int v,int f)
{
E[e]=Edge(u,v,f,head[u]);
head[u]=e++;
E[e]=Edge(v,u,0,head[v]);
head[v]=e++;
}
void Build()
{
e=st=0,des=n+m+1;
memset(head,-1,sizeof(head));
for(int i=1;i<=n;i++)
for(int j=1;j<=m;j++)
AddEdge(i,n+j,9);
for(int i=1;i<=n;i++)
AddEdge(st,i,row[i]);
for(int i=1;i<=m;i++)
AddEdge(n+i,des,col[i]);
}
bool BFS()
{
memset(level,0,sizeof(level));
level[st]=1;
int pre=0,last=1;
q[pre]=st;
while(pre<last)
{
int u=q[pre++];
for(int i=head[u];i!=-1;i=E[i].nxt)
if(E[i].f&&!level[E[i].v])
{
level[E[i].v]=level[u]+1;
q[last++]=E[i].v;
if(E[i].v==des)
return level[E[i].v];
}
}
return level[des];
}
int DFS(int u,int maxf)
{
if(u==des||!maxf)
return maxf;
int f=0;
for(int i=head[u];i!=-1;i=E[i].nxt)
if(E[i].f&&level[E[i].v]==level[u]+1)
{
int t=DFS(E[i].v,min(E[i].f,maxf-f));
if(t>0)
{
E[i].f-=t;
E[i^1].f+=t;
f+=t;
if(f==maxf)
break;
}
else
level[E[i].v]=0;
}
return f;
}
int maxflow()
{
int ans=0;
while(BFS())
ans+=DFS(st,inf);
return ans;
}
bool dfs(int u,int f)
{
vis[u]=1;
for(int &i=head[u];i!=-1;i=E[i].nxt)
if(E[i].f)
{
if(!vis[E[i].v])
{
if(dfs(E[i].v,u))
return true;
}
else if(E[i].v!=f)
return true;
}
vis[u]=0;
return false;
}
void solve(int sumr,int sumc)
{
if(sumr!=sumc)
{
printf("So naive!\n");
return;
}
Build();
int ans=maxflow();
if(ans!=sumc)
{
printf("So naive!\n");
return;
}
memset(vis,0,sizeof(vis));
bool is=false;
for(int i=1;i<=n;i++)
if(dfs(i,-1))
is=true;
if(!is)
printf("So simple!\n");
else
printf("So young!\n");
}
inline bool read(int &n)
{
int x = 0, tmp = 1;
char c = getchar();
while((c < '0' || c > '9') && c != '-' && c != EOF) c = getchar();
if(c == EOF) return false;
if(c == '-') c = getchar(), tmp = -1;
while(c >= '0' && c <= '9') x *= 10, x += (c - '0'),c = getchar();
n = x*tmp;
return true;
}
int main()
{
int T,cas=1;
scanf("%d",&T);
while(T--)
{
sumr=sumc=0;
scanf("%d%d",&n,&m);
for(int i=1;i<=n;i++)
{
read(row[i]);
sumr+=row[i];
}
for(int i=1;i<=m;i++)
{
read(col[i]);
sumc+=col[i];
}
printf("Case #%d: ",cas++);
solve(sumr,sumc);
}
return 0;
}