atcoder/abc144D

Author: xirc

atcoder/abc144/D/main.cpp

@@ -0,0 +1,23 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+using ll = int64_t;
+using ff = long double;
+
+int main() {
+    ios_base::sync_with_stdio(false);
+    cin.tie(0); cout.tie(0);
+
+    int a, b, x;
+    cin >> a >> b >> x;
+    ff theta;
+    if (2 * x >= a * a * b) {
+        theta = atan2(2 * a * a * b - 2 * x, a * a * a);
+    } else {
+        theta = M_PI / ff(2.0) - atan2(2 * x, a * b * b);
+    }
+    theta = theta * ff(180) / M_PI;
+    cout << fixed << setprecision(7) << theta << endl;
+
+    return 0;
+}