diff --git a/未命名1.cpp b/未命名1.cpp
new file mode 100644
index 0000000..8c66ec9
--- /dev/null
+++ b/未命名1.cpp
@@ -0,0 +1,21 @@
+#include<iostream>
+using namespace std;
+int main(){
+	int n;
+	cin >> n;
+	if(n >= 90){
+		cout << "����";
+	}
+	else if(n >= 75){
+		cout << "����"; 
+	}
+	else if(n >= 60){
+		cout << "����"; 
+	}
+	else{
+		cout << "������";
+	}
+	
+	
+	return 0;
+}
diff --git a/未命名1.exe b/未命名1.exe
new file mode 100644
index 0000000..3b540d5
Binary files /dev/null and b/未命名1.exe differ
diff --git a/未命名2.cpp b/未命名2.cpp
new file mode 100644
index 0000000..2002ac7
--- /dev/null
+++ b/未命名2.cpp
@@ -0,0 +1,14 @@
+#include<iostream>
+using namespace std;
+int main(){
+	int a,b,c,n;
+	cin >> n;
+	a = n / 100;
+	b = n / 10 % 10;
+	c = n % 100 % 10;
+	cout << c << b << a;
+	
+	
+	return 0;
+}
+
diff --git a/未命名2.exe b/未命名2.exe
new file mode 100644
index 0000000..27a7fef
Binary files /dev/null and b/未命名2.exe differ
diff --git a/未命名3.cpp b/未命名3.cpp
new file mode 100644
index 0000000..3d75453
--- /dev/null
+++ b/未命名3.cpp
@@ -0,0 +1,15 @@
+#include<iostream>
+using namespace std;
+int main(){
+	int x,a,y,b,z;
+	cin >>  x >> a >> y >> b;
+	z = (a*x - b*y) / (a - b);
+	cout << z;
+	
+	
+	
+	
+	
+	return 0;
+}
+
diff --git a/未命名3.exe b/未命名3.exe
new file mode 100644
index 0000000..b61dd7f
Binary files /dev/null and b/未命名3.exe differ