{"trustable":false,"sections":[{"title":"Sample Input","value":{"format":"HTML","content":"\u003cpre class\u003d\"sio\"\u003e\n输入T组数据,每组一个数N后接N个数,表示N根木棍的长度,问这些木棍是否能首尾相连形成一个正方形\n3\n4 1 1 1 1\n5 10 20 30 40 50\n8 1 7 2 6 4 4 3 5\n\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cpre class\u003d\"sio\"\u003eyes\nno\nyes\n\u003c/pre\u003e"}}]}