{"trustable":true,"sections":[{"title":"","value":{"format":"HTML","content":"\u003cstyle type\u003d\"text/css\"\u003e .sampledata { font-family: \"Courier New\", Courier, monospace; white-space: pre; }\u003c/style\u003e\u003cp\u003e\u003cimg SRC\u003d\"CDN_BASE_URL/7b086b4078812984374c8c8e8894c23d?v\u003d1591589369\" width\u003d\"0\" height\u003d\"0\" alt\u003d\"\"\u003e\u003cimg SRC\u003d\"CDN_BASE_URL/d3d29d3361fbfd75ce9058085e16c25b?v\u003d1591589369\" width\u003d\"784\" height\u003d\"118\" alt\u003d\"\"\u003e\u003c/p\u003e \n\u003cp\u003e\u003c/p\u003e"}},{"title":"Input","value":{"format":"HTML","content":"\u003cdiv\u003e \n \u003cdiv\u003e\n 输入数据的第一行包含一个整数N,表示数组中的元素个数。\n \u003c/div\u003e \n \u003cdiv\u003e\n 第二行包含N个整数A1,A2,…,AN。\n \u003c/div\u003e \n \u003cdiv\u003e\u003c/div\u003e \n\u003c/div\u003e \n\u003cdiv\u003e\u003c/div\u003e \n\u003cp\u003e\u003c/p\u003e"}},{"title":"Output","value":{"format":"HTML","content":"\u003cdiv\u003e\n 输出一行包含给定表达式可能的最大值。\n\u003c/div\u003e \n\u003cdiv\u003e \n \u003cdiv\u003e\u003c/div\u003e \n\u003c/div\u003e \n\u003cp\u003e\u003c/p\u003e"}},{"title":"Sample Input","value":{"format":"HTML","content":"\u003cspan class\u003dsampledata\u003e5\r\n1 2 3 1 2\u003c/span\u003e\u003c/div\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cspan class\u003dsampledata\u003e6\u003c/span\u003e\u003c/div\u003e"}},{"title":"Hint","value":{"format":"HTML","content":"\u003cp\u003e\u003c/p\u003e\n\u003cdiv\u003e\n 满足条件的(l1,r1,l2,r2)有:(1,2,3,3),(1,2,4,5),(3,3,4,5)。\n\u003c/div\u003e\n\u003cbr\u003e \n\u003cdiv\u003e\n 对于100%的数据,2 ≤ N ≤ 4*105,0 ≤ Ai ≤ 109。\n\u003c/div\u003e\n\u003cbr\u003e \n\u003cp\u003e\u003c/p\u003e\n\u003cp\u003e\u003c/p\u003e"}}]}