{"trustable":false,"prependHtml":"\u003cstyle type\u003d\u0027text/css\u0027\u003e\n .input, .output {\n border: 1px solid #888888;\n }\n .output {\n margin-bottom: 1em;\n position: relative;\n top: -1px;\n }\n .output pre, .input pre {\n background-color: #EFEFEF;\n line-height: 1.25em;\n margin: 0;\n padding: 0.25em;\n }\n \u003c/style\u003e\n \u003clink rel\u003d\"stylesheet\" href\u003d\"//codeforces.org/s/96598/css/problem-statement.css\" type\u003d\"text/css\" /\u003e\n\u003cscript\u003e\n window.katexOptions \u003d {\n delimiters: [\n {left: \u0027$$$$$$\u0027, right: \u0027$$$$$$\u0027, display: true},\n {left: \u0027$$$\u0027, right: \u0027$$$\u0027, display: false},\n {left: \u0027$$\u0027, right: \u0027$$\u0027, display: true},\n {left: \u0027$\u0027, right: \u0027$\u0027, display: false}\n ]\n };\n\u003c/script\u003e\n","sections":[{"title":"","value":{"format":"HTML","content":"\u003cdiv\u003e\n 众所周知,猪猪侠喜欢和小姐姐在一起。我们可以假设,如果一个地方有小姐姐,那在范围d内一定会有猪猪侠出现。现在,猪猪侠和小姐姐们在一个树形结构的区域上,已知小姐姐们所在的节点位置以及范围d,问有多少节点可能出现猪猪侠。\u003c/br\u003e\n注:猪猪侠是胆大的,所以有小姐姐出现的节点同样也可能出现猪猪侠,而且猪猪侠只有一个;\n\u003c/div\u003e"}},{"title":"Input","value":{"format":"HTML","content":"\n 第一行n,m,d(1\u0026lt;\u003dm\u0026lt;\u003dn\u0026lt;\u003d100000)(0\u0026lt;\u003dd\u0026lt;\u003dn-1)分别表示节点数,小姐姐数与范围d\u003c/br\u003e\n 第二行为p1到pm(1\u0026lt;\u003dpi\u0026lt;\u003d n)表示小姐姐所在的位置\u003c/br\u003e\n后面n-1行,每行两个数ai,bi代表一条边的两个端点"}},{"title":"Output","value":{"format":"HTML","content":"\u003cdiv\u003e \n \u003cdiv\u003e \n \u003cp\u003e \u003cspan\u003e一个整数\u003c/span\u003e \u003cspan\u003e代表\u003c/span\u003e \u003cspan\u003e猪猪侠可能出现的节点位置的数量。\u003c/span\u003e\u003c/p\u003e \n \u003c/div\u003e \n\u003c/div\u003e"}},{"title":"Sample Input","value":{"format":"HTML","content":"\u003cdiv\u003e \n \u003cdiv\u003e \n \u003cdiv\u003e \n \u003cdiv\u003e \n \u003cdiv\u003e \n \u003cdiv\u003e\n 6 2 3\n \u003c/div\u003e \n \u003cdiv\u003e\n 1 2\n \u003c/div\u003e \n \u003cdiv\u003e\n 1 5\n \u003c/div\u003e \n \u003cdiv\u003e\n 2 3\n \u003c/div\u003e \n \u003cdiv\u003e\n 3 4\n \u003c/div\u003e \n \u003cdiv\u003e\n 4 5\n \u003c/div\u003e \n \u003cdiv\u003e\n 5 6\n \u003c/div\u003e \n \u003cdiv\u003e\n \u0026nbsp;\n \u003c/div\u003e \n \u003c/div\u003e \n \u003c/div\u003e \n \u003c/div\u003e \n \u003c/div\u003e \n\u003c/div\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cp\u003e 3\u003c/p\u003e"}},{"title":"","value":{"format":"HTML","content":"案例1\n\u003ccenter\u003e \n \u003cimg class\u003d\"tex-graphics\" SRC\u003d\"CDN_BASE_URL/2d6b243c5f0d9c27cefe988f782fd5be?v\u003d1564209360\" style\u003d\"max-width: 100.0%;max-height: 100.0%;\"\u003e \n\u003c/center\u003e"}}]}