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\u003c/style\u003e","sections":[{"title":"","value":{"format":"HTML","content":"有n个数字，x1，x2，xn；两个数字能够匹配要满足：\u003c/br\u003e\n1：i，j没有被匹配过\u003c/br\u003e\n2：|xi-xj|\u003e\u003dz\u003c/br\u003e\n问最多有多少对能够匹配"}},{"title":"Input","value":{"format":"HTML","content":"第一行输入两个正整数n和z。2\u003c\u003dn\u003c2e5,1\u003c\u003dz\u003c\u003d1e9\u003c/br\u003e\n\n第二行输入n个正整数 x1到xn 1\u003c\u003dxi\u003c\u003d1e9"}},{"title":"Output","value":{"format":"HTML","content":"输出一个正整数，最多有多少对数字能够匹配"}},{"title":"Examples","value":{"format":"HTML","content":"\u003cpre class\u003d\"sio\"\u003e\n样例1:\n4 2\n1 3 3 7\n2\n\n样例2：\n5 5\n10 9 5 8 7\n1\n\u003c/pre\u003e"}},{"title":"Note","value":{"format":"HTML","content":""}}]}