Add 20575.cpp

Hiyabye · Feb 18, 2024 · c81e8a0 · c81e8a0
1 parent 9dadcc4
commit c81e8a0
Showing 1 changed file with 23 additions and 0 deletions.
diff --git a/20xxx/20575.cpp b/20xxx/20575.cpp
@@ -0,0 +1,23 @@
+#include <cmath>
+#include <iomanip>
+#include <iostream>
+using namespace std;
+
+void solve(void) {
+  int n; cin >> n;
+
+  double ans = 0;
+  for (int i=0; i<n; i++) {
+    double x1, y1, x2, y2; cin >> x1 >> y1 >> x2 >> y2;
+    if ((int)floor(x1) != (int)floor(x2)) ans++;
+  }
+  cout << fixed << setprecision(7) << 2 / ans * n;
+}
+
+int main(void) {
+  ios::sync_with_stdio(false);
+  cin.tie(nullptr);
+
+  solve();
+  return 0;
+}