'commit'

LuoGu/RuMen/P1426.cpp

@@ -0,0 +1,14 @@
+#include<bits/stdc++.h>
+
+using namespace std;
+
+int main() {
+    double v = 7, s, x, l = 0;
+    cin >> s >> x;
+    while (l < s - x) {
+        l += v;
+        v *= 0.98;
+    }
+    if (v * 0.98 <= s + x - l)cout << 'y';
+    else cout << 'n';
+}