{"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\u003cscript\u003e window.katexOptions \u003d { disable: true }; \u003c/script\u003e\n\u003cscript type\u003d\"text/x-mathjax-config\"\u003e\n MathJax.Hub.Config({\n tex2jax: {\n inlineMath: [[\u0027$$$\u0027,\u0027$$$\u0027], [\u0027$\u0027,\u0027$\u0027]],\n displayMath: [[\u0027$$$$$$\u0027,\u0027$$$$$$\u0027], [\u0027$$\u0027,\u0027$$\u0027]]\n }\n });\n\u003c/script\u003e\n\u003cscript type\u003d\"text/javascript\" async src\u003d\"https://mathjax.codeforces.org/MathJax.js?config\u003dTeX-AMS_HTML-full\"\u003e\u003c/script\u003e","sections":[{"title":"","value":{"format":"MD","content":"这是一道简单题。\n给定一棵有 $$$n$$$ 个节点的树——“颜树”,每个节点被染上了颜色。\n对于一棵子树,它的严肃值为子树所有节点中不同的颜色数量。\n然后就是 $$$m$$$ 次在颜树上的操作。\n操作的方式有两种:\n1.将以 $$$u$$$ 为根的子树的结点全部更新为颜色 $$$col$$$ \n2.问以 $$$u$$$ 为根的子树的结点的严肃值。\n做到这里的你想必已经过五关斩六将,最后一道题是给您送分的。"}},{"title":"Input","value":{"format":"MD","content":"第一行输入两个整数 $$$n , m$$$($$$ 1\u003c\u003d n, m \u003c\u003d 4e5 $$$)\n第二行输入$n$个节点的颜色$col_i$, $1 \u003c\u003d col_i \u003c\u003d 60$\n接下来$n-1$行,每行两个数 $a, b$ ,代表颜树的$a$点和$b$点连有一条边。\n最后$m$行操作,操作有$2$种: \n$1$ $u$ $col$ 代表操作$1$\n$2$ $u$ 代表操作$2$"}},{"title":"Output","value":{"format":"MD","content":"对于每次询问严肃值的操作,输出一行整数,代表询问的结果。"}},{"title":"Example","value":{"format":"MD","content":"$输入$\n10 10\n59 59 59 59 59 59 59 59 59 59\n6 8\n6 10\n2 6\n2 5\n7 2\n10 1\n4 2\n7 3\n9 1\n1 8 59\n2 8\n1 3 59\n1 4 59\n1 8 59\n1 2 59\n1 5 59\n1 10 59\n2 2\n2 5\n\n$输出$\n1\n1\n1"}},{"title":"","value":{"format":"MD","content":""}}]}