delete pics to save space

history_source/信息学奥赛一本通/1.5.3.2.cpp

@@ -0,0 +1,21 @@
+#include<iostream>
+#include<string>
+using namespace std;
+int main()
+{
+	string s;
+	cin>>s;
+	int le[26]={0};
+	for(int i=0;i<s.size();i++) le[s[i]-'a']++;
+	for(int i=0;i<s.size();i++)
+	{
+		if(le[s[i]-'a']==1)
+		{
+			cout<<s[i]<<endl;
+			return 0;
+		}
+	}
+	cout<<"no"<<endl;
+	return 0;
+}
+