delete pics to save space

1.1666.cpp

@@ -0,0 +1,44 @@
+#include<iostream>
+#include<cstdio>
+#include<cstring>
+#include<algorithm>
+#include<vector>
+using namespace std;
+typedef unsigned long long LL;
+const int maxn=55;
+int n,in[maxn];
+string s[maxn];
+LL f[maxn];
+vector<int> G[maxn];
+void dfs(int u)
+{
+	f[u]=1;
+	for(int i=0;i<G[u].size();i++) { dfs(G[u][i]); f[u]*=f[G[u][i]]; }
+	f[u]++;
+}
+inline bool cmp(const string &a,const string &b) { return a.size()<b.size(); }
+int main()
+{
+	#ifdef local
+	freopen("pro.in","r",stdin);
+	#endif
+	cin>>n;
+	for(int i=1;i<=n;i++) cin>>s[i];
+	sort(s+1,s+n+1,cmp);
+	// for(int i=1;i<=n;i++) cout<<s[i]<<endl;
+	for(int i=n;i>=1;i--)
+	{
+		for(int j=i-1;j>=1;j--)
+			if(s[i].substr(0,s[j].size())==s[j])
+			{
+				G[j].push_back(i);
+				in[i]++;
+				// printf("add %d %d\n",j,i);
+				break;
+			}
+	}
+	for(int i=1;i<=n;i++) if(in[i]==0) G[0].push_back(i);
+	dfs(0);
+	cout<<f[0]-1<<endl;
+	return 0;
+}