[20251102] BOJ / G5 / 축구 / 이준희

Author: JHLEE325

JHLEE325/202511/02 BOJ G5 축구.md

@@ -0,0 +1,47 @@
+```java
+import java.io.*;
+import java.util.*;
+
+public class Main {
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        double agoal = Double.parseDouble(br.readLine().trim()) / 100.0;
+        double bgoal = Double.parseDouble(br.readLine().trim()) / 100.0;
+
+        boolean[] isPrime = new boolean[18+1];
+        int[] primes = {2, 3, 5, 7, 11, 13, 17};
+        for (int p : primes) isPrime[p] = true;
+
+        double nonPrimeA = 0.0;
+        for (int a = 0; a <= 18; a++) {
+            if (!isPrime[a]) {
+                nonPrimeA += comb(18, a) * Math.pow(agoal, a) * Math.pow(1 - agoal, 18 - a);
+            }
+        }
+
+        double nonPrimeB = 0.0;
+        for (int b = 0; b <= 18; b++) {
+            if (!isPrime[b]) {
+                nonPrimeB += comb(18, b) * Math.pow(bgoal, b) * Math.pow(1 - bgoal, 18 - b);
+            }
+        }
+
+        double no = nonPrimeA * nonPrimeB;
+
+        double result = 1.0 - no;
+
+        System.out.printf("%.6f\n", result);
+    }
+
+    static double comb(int n, int k) {
+        if (k > n) return 0;
+        if (k > n - k) k = n - k;
+        double res = 1.0;
+        for (int i = 0; i < k; i++) {
+            res *= (n - i);
+            res /= (i + 1);
+        }
+        return res;
+    }
+}
+```