diff --git a/PAT/PAT-A/CPP/1001.A+B Format.cpp b/PAT/PAT-A/CPP/1001.A+B Format.cpp
index 8b13789..1c19ef9 100644
--- a/PAT/PAT-A/CPP/1001.A+B Format.cpp	
+++ b/PAT/PAT-A/CPP/1001.A+B Format.cpp	
@@ -1 +1,14 @@
-
+#include <iostream>
+using namespace std;
+int main(){
+	int a, b;
+	cin >> a >> b;
+	string s = to_string(a + b);
+	int len = s.length();
+	for(int i = 0; i < len; i++){
+		cout << s[i];
+		if(s[i] == '-') continue;
+		if((i + 1) % 3 == len % 3 && i + 1 != len) cout << ",";
+	}
+	return 0;
+}