Flip Game
给一个string里面是+和-, 求反转连续两个+后的所以可能string.
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class Solution { public List<String> generatePossibleNextMoves(String s) { List<String> res = new ArrayList<>(); StringBuilder sb = new StringBuilder(s); for(int i = 0 ; i+1 < sb.length(); i++) { if(sb.charAt(i) == '+' && sb.charAt(i+1) == '+') { StringBuilder t = new StringBuilder(s); t.setCharAt(i, '-'); t.setCharAt(i+1, '-'); res.add(t.toString()); } } return res; } } |