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public class BearDarts {
    int gcd(int a, int b) {
        return a > 0 ? gcd(b%a,a) : b;
    }
    Long hash(int a, int b) {
        int g = gcd(a, b);
        return a/g * 1000L * 1000 * 1001 + b/g;
    }
    TreeMap<Long,Integer> m = new TreeMap();
    void add(int a, int b) {
        Long x = hash(a, b);
        Integer now = m.get(x);
        if(now == null) now = 0;
        m.put(x, now + 1);
    }
    int cnt(int a, int b) {
        Long x = hash(a, b);
        Integer now = m.get(x);
        if(now == null) return 0;
        return now;
    }
    public long count(int[] scores) {
        int n = scores.length;
        long result = 0;
        for(int i = 0; i < n; ++i) {
            int c = scores[i];
            for(int j = i + 1; j < n; ++j) {
                int d = scores[j];
                result += cnt(d, c);
            }
            int b = scores[i];
            for(int j = 0; j < i; ++j) {
                int a = scores[j];
                add(a, b);
            }
        }
        return result;
    }
}
 

Main.java:1: error: class BearDarts is public, should be declared in a file named BearDarts.java
public class BearDarts {
       ^
Main.java:9: error: cannot find symbol
    TreeMap<Long,Integer> m = new TreeMap();
    ^
  symbol:   class TreeMap
  location: class BearDarts
Main.java:9: error: cannot find symbol
    TreeMap<Long,Integer> m = new TreeMap();
                                  ^
  symbol:   class TreeMap
  location: class BearDarts
3 errors

Standard output is empty