'commit'

TangDou/LuoGuBook/P1423.cpp

@@ -0,0 +1,16 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+double k;
+double x;
+
+int main() {
+    cin >> k;
+    for (int cnt = 1;; cnt++) {
+        x += 2.0 * pow(0.98, cnt - 1);
+        if (x >= k) {
+            cout << cnt << endl;
+            exit(0);
+        }
+    }
+}