反相放大器和非反相放大器的区别
求解代码publicintcountSubstrings(Strings){if(snull||s.length()
{return0;}intans0;for(inti0;is.length();i){//
以i为中心奇数长度回文anscountPalindrome(s,i,i);//
以i和i1为中心偶数长度回文anscountPalindrome(s,i,i
;}returnans;}privateintcountPalindrome(Strings,intleft,intright){intcount0;while(left0rights.length()s.charAt(left)s.charAt(right)){count;left--;right;}returncount;}
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