delete pics to save space

2.536.cpp

@@ -0,0 +1,64 @@
+#include<iostream>
+#include<string>
+#include<sstream>
+using namespace std;
+string s1,s2;
+struct node
+{
+	char v;
+	node *lch,*rch;
+	node()
+	{
+		v=0;
+		lch=rch=0;
+	}
+};
+inline node* newnode()
+{
+	return new node();
+}
+int pos=0;
+void solve(node*& root,string str,int step)
+{
+	if(str.size()==0||pos>=s1.size()) return;
+//	for(int i=0;i<step;i++) printf("\t");
+//	printf("input %s,root=%c\n",str.c_str(),s1[pos]);
+	root=newnode();
+	root->v=s1[pos];
+	if(str.size()==1)
+	{
+		pos++;
+		return;
+	}
+	int t=str.find(s1[pos]);
+	pos++;
+	solve(root->lch,str.substr(0,t),step+1);
+	if(t+1<str.size()) solve(root->rch,str.substr(t+1),step+1);
+}
+void print(node* root)
+{
+	if(root==0) return;
+	print(root->lch);
+	print(root->rch);
+	printf("%c",root->v);
+}
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	while(cin>>s1>>s2)
+	{
+		node* root=0;
+		pos=0;
+		solve(root,s2,0);
+		print(root);
+		printf("\n");
+	}
+	return 0;
+}
+/*
+DBACEGF ABCDEFG
+
+
+*/