delete pics to save space

7.3630.cpp

@@ -0,0 +1,41 @@
+#include<cstdio>
+#include<cstring>
+#include<algorithm>
+using namespace std;
+const int maxn=10005;
+int T,n;
+char buf[15];
+int G[maxn*10][10],v[maxn*10],cnt;
+inline int insert(char *s)
+{
+	int len=strlen(s),p=0;
+	for(int i=0;i<len;i++)
+	{
+		if(!G[p][s[i]-'0']) G[p][s[i]-'0']=cnt++;
+		p=G[p][s[i]-'0'];
+		if(v[p]==2||(i==len-1&&v[p]==1)) return 0;
+		v[p]=1;
+	}
+	v[p]=2;
+	return 1;
+}
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	scanf("%d",&T);
+	while(T-->0)
+	{
+		cnt=1; memset(G,0,sizeof(G)); memset(v,0,sizeof(v));
+		scanf("%d",&n);
+		bool res=1;
+		for(int i=0;i<n;i++)
+		{
+			scanf("%s",buf);
+			res&=insert(buf);
+		}
+		puts(res?"YES":"NO");
+	}
+	return 0;
+}