{"trustable":false,"sections":[{"title":"","value":{"format":"MD","content":"给你一串n个数的数列a,上面的数为a1到an。我们求最大的y-x,其中,y和x满足\n\n1.x\u003cy \n\n2.$x \u003c i \u003c y$,都有 $ai \u003e ax$ \u0026\u0026 $ai \u003c ay$。\n\n求 j-i 最大值"}},{"title":"Input","value":{"format":"MD","content":"多组输入数据\u003c/br\u003e\n第一行一个整数n (n \u0026lt;\u003d 50000)\u003c/br\u003e\n第二行n个不超过100000的正数\u003c/br\u003e "}},{"title":"Output","value":{"format":"MD","content":"输出j-i的最大值,如果没有满足条件的数,输出-1"}},{"title":"Sample Input","value":{"format":"MD","content":"\u003cpre class\u003d\"sio\"\u003e4\n5 4 3 6\n4\n6 5 4 3\n\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"MD","content":"\u003cpre class\u003d\"sio\"\u003e1\n-1\n\u003c/pre\u003e"}}]}