Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Ot...
Time Limit: 1000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Ot...
Time Limit: 3000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Ot...
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Ot...
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Othe...
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Oth...
Time Limit: 1000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Oth...
Time Limit: 3000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Oth...
1. 继承,即是在已经存在的类的基础上再进行扩展,从而产生新的类。已经存在的类成为父类、超类和基类,而新产生的类成为子类或派生类。