Signed-off-by: 10-4 <10-4@sairate.fun>

三位数交换.cpp

@@ -0,0 +1,8 @@
+#include<iostream>
+using namespace std;
+int main(){
+	int n;
+	cin>>n;
+	cout<<(n%10)<<(n/10%10)<<(n/100);
+	return 0;
+}

两位数交换 .cpp

@@ -0,0 +1,8 @@
+#include<iostream>
+using namespace std;
+int main(){
+	int n;
+	cin>>n;
+	cout<<(n%10)+(n/10%10)+(n/100);
+	return 0;
+}

小杨买书.cpp

@@ -0,0 +1,8 @@
+#include<iostream>
+using namespace std;
+int main(){
+	int m;
+	cin>>m;
+	cout<<m/13<<" "<<m%13;
+	return 0;
+}