{"trustable":false,"sections":[{"title":"题面:","value":{"format":"MD","content":"你的朋友和你参加了含有n道判断题的考试。你知道你的答案,你也知道你朋友的答案,你的朋友有k道题是正确的。\n请计算你最多可能正确多少道题目。"}},{"title":"输入:","value":{"format":"MD","content":"第一行包含一个整数k\n第二行包含一个长度为n(1\u003c\u003dn\u003c\u003d1000)的字符串,代表你的答案,每个字符为’T’或’F’\n第三行包含一个长度为n(1\u003c\u003dn\u003c\u003d1000)的字符串,代表你朋友的答案。每个字符为’T’或’F’\n输入满足0\u003c\u003dk\u003c\u003dn"}},{"title":"输出:","value":{"format":"MD","content":"输出一行,你最多可能正确多少道题目"}},{"title":"样例输入:","value":{"format":"MD","content":"3 \nFTFFF \nTFTTT"}},{"title":"样例输出:","value":{"format":"MD","content":"2"}},{"title":"样例输入:","value":{"format":"MD","content":"6 \nTTFTFFTFTF \nTTTTFFTTTT"}},{"title":"样例输出:","value":{"format":"MD","content":"9"}}]}