diff --git a/29xxx/29538.cpp b/29xxx/29538.cpp
new file mode 100644
index 00000000..82ed63b3
--- /dev/null
+++ b/29xxx/29538.cpp
@@ -0,0 +1,25 @@
+#include <iomanip>
+#include <iostream>
+#include <numeric>
+#include <vector>
+using namespace std;
+
+void solve(void) {
+  int m, n, a; cin >> m >> n >> a;
+  vector<int> w(n);
+  for (int i=0; i<n; i++) cin >> w[i];
+
+  if (a >= 1000) {
+    cout << "Impossible\n";
+  } else {
+    cout << fixed << setprecision(7) << (a * (m + accumulate(w.begin(), w.end(), 0))) / (1000.0 - a);
+  }
+}
+
+int main(void) {
+  ios::sync_with_stdio(false);
+  cin.tie(nullptr);
+
+  solve();
+  return 0;
+}
\ No newline at end of file