0-9 AC

2009.cpp

@@ -0,0 +1,14 @@
+#include <iostream>
+#include <iomanip>
+#include <cmath>
+using namespace std;
+int main(){
+    double a,n,o;
+    while(cin>>a>>n){
+        o = a;
+        for(int i =0;i<n-1;i++)
+            o += a=sqrt(a);
+        cout << setiosflags(ios::fixed) << setprecision(2) << o << endl;
+    }
+    return 0;
+}