'commit'

TangDou/XiTi/1242.cpp

@@ -0,0 +1,19 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int main() {
+    float x;
+    cin >> x;
+    float pre = 2;
+    float sum = 2;
+    for (int i = 2;; i++) {
+        sum += pre * 0.98;
+        pre = pre * 0.98;
+        if (sum > x) {
+            cout << i << endl;
+            break;
+        }
+    }
+    return 0;
+}