import java.util.*;

class P4 {
    String name;
    int marks;

    public Student(String name, int marks) {
        this.name = name;
        this.marks = marks;
    }

    public boolean equals(Object s) {
        if (this == s) return true;
        if (s == null || getClass() != s.getClass()) return false;
        Student student = (Student) s;
        return Objects.equals(name, student.name);
    }

    public int hashCode() {
        return Objects.hash(name);
    }

    public String toString() {
        return "Student{name='" + name + "', marks=" + marks + "}";
    }

    public static void main(String[] args) {
        Student s1 = new Student("Alice", 85);
        Student s2 = new Student("Bob", 90);
        Student s3 = new Student("Alice", 85);

        System.out.println("s1.equals(s2): " + s1.equals(s2));
        System.out.println("s1.equals(s3): " + s1.equals(s3));
        System.out.println("s1.hashCode(): " + s1.hashCode());
        System.out.println("s2.hashCode(): " + s2.hashCode());
        System.out.println("s3.hashCode(): " + s3.hashCode());
        System.out.println("s1.toString(): " + s1.toString());
        System.out.println("s2.toString(): " + s2.toString());
        System.out.println("s3.toString(): " + s3.toString());
    }
}