P4160 [SCOI2009]生日快乐

R60087012

Luogu/problem/P4160/P4160.cpp

@@ -0,0 +1,20 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int x, y, n;
+
+double dfs(double x, double y, int k) {
+    if (k == 1) return max(x, y) / min(x, y);
+    double ans = 0x3f3f3f3f;
+    for (int i = 1; i <= k / 2; i++) {
+        ans = min({ans, max(dfs(x / k * i, y, i), dfs(x - x / k * i, y, k - i)), max(dfs(x, y / k * i, i), dfs(x, y - y / k * i, k - i))});
+    }
+    return ans;
+}
+
+int main() {
+    cin >> x >> y >> n;
+    cout << fixed << setprecision(6) << dfs(x, y, n) << endl;
+    return 0;
+}