delete pics to save space

2.247.cpp

@@ -0,0 +1,72 @@
+#include<iostream>
+#include<string>
+#include<cstring>
+#include<map>
+using namespace std;
+const int maxn=25;
+map<string,int> s_i;
+string i_s[maxn+5],a,b;
+int n,m,cnt,i,j,k,kase;
+inline int ID(const string &str)
+{
+	if(!s_i.count(str))
+	{
+		s_i[str]=cnt;
+		i_s[cnt++]=str;
+	}
+	return s_i[str];
+}
+bool g[maxn+5][maxn+5],e[maxn+5][maxn+5],vis[maxn+5],flag;
+void dfs(int id)
+{
+	if(vis[id]) return;
+	if(flag) cout<<", ";
+	flag=true;
+	cout<<i_s[id];
+	vis[id]=true;
+	for(int i=0;i<n;i++)
+		if(e[id][i])
+			dfs(i);
+}
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	while((cin>>n>>m)&&n)
+	{
+		s_i.clear();
+		cnt=0;
+		memset(g,0,sizeof(g));
+		memset(e,0,sizeof(e));
+		memset(vis,0,sizeof(vis));
+		for(i=0;i<m;i++)
+		{
+			cin>>a>>b;
+			g[ID(a)][ID(b)]=true;
+		}
+		for(k=0;k<n;k++)
+			for(i=0;i<n;i++)
+				for(j=0;j<n;j++)
+					g[i][j]=g[i][j]||(g[i][k]&&g[k][j]);
+		for(i=0;i<n;i++)
+			for(j=i+1;j<n;j++)
+				if(g[i][j]&&g[j][i]) e[i][j]=e[j][i]=1;
+//		for(i=0;i<n;i++)
+//			for(j=0;j<n;j++)
+//				if(g[i][j]) cout<<i_s[i]<<" -> "<<i_s[j]<<endl;
+//		for(i=0;i<n;i++)
+//			for(j=0;j<n;j++)
+//				if(e[i][j]) cout<<i_s[i]<<" <-> "<<i_s[j]<<endl;
+		if(kase) cout<<endl;
+		cout<<"Calling circles for data set "<<++kase<<":\n";
+		for(i=0;i<n;i++)
+			if(!vis[i])
+			{
+				flag=false;
+				dfs(i);
+				cout<<endl;
+			}
+	}
+	return 0;
+}