题目链接: D. Recover the String time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output For each string s consisting of characters '0' and '1' one can define four integers a00, a01, a10 and a11, where …
String类创建对象的方法可以分为以下三种 1.String a = "123"; 2.String b = new String("123"); 3.String c = "12" + "3"; 1程序执行时,会先去jvm的常量池(在方法区中)中寻找有没有"123" 的String 对象,如果已经存在,则无须新建对象,直接把常量池中的对象地址返回给栈中的引用 a (此时没有建立对象) 如果没有存在,则在…
B. Recover the String 题目连接: http://www.codeforces.com/contest/708/problem/B Description For each string s consisting of characters '0' and '1' one can define four integers a00, a01, a10 and a11, where axy is the number of subsequences of length 2 of…
For each string s consisting of characters '0' and '1' one can define four integers a00, a01, a10 and a11, where axy is the number of subsequences of length 2 of the string s equal to the sequence {x, y}. In these problem you are given four integers…
