delete pics to save space

2.10815.cpp

@@ -0,0 +1,24 @@
+#include<iostream>
+#include<string>
+#include<set>
+#include<sstream>
+using namespace std;
+set<string> dict;
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif 
+	string s,buf;
+	while(cin>>s)
+	{
+		for(int i=0;i<s.size();i++)
+			if(isalpha(s[i])) s[i]=tolower(s[i]);
+			else s[i]=' ';
+		stringstream ss(s);
+		while(ss>>buf) dict.insert(buf);
+	}
+	for(set<string>::iterator it=dict.begin();it!=dict.end();it++)
+		cout<<*it<<endl;
+	return 0;
+}