diff --git a/PAT/PAT-B/CPP/1063.计算谱半径.cpp b/PAT/PAT-B/CPP/1063.计算谱半径.cpp
new file mode 100644
index 0000000..c264076
--- /dev/null
+++ b/PAT/PAT-B/CPP/1063.计算谱半径.cpp
@@ -0,0 +1,15 @@
+#include <iostream>
+#include <cmath>
+using namespace std;
+int main(){
+	int n, a, b;
+	float max = 0.0;
+	cin >> n;
+	for(int i = 0; i < n; i++){
+		cin >> a >> b;
+		float temp = sqrt(a * a + b * b);
+		if(temp > max) max = temp;
+	}
+	printf("%.2f", max);
+	return 0;
+}