47 lines
1.2 KiB
C++
47 lines
1.2 KiB
C++
#include<iostream>
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#include<cstdio>
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#include<algorithm>
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using namespace std;
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int main()
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{
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int kase;
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scanf ("%d", &kase);
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while (kase--)
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{
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int n, k;
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long long ans = 0;
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int num[100200], pos[100200];
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scanf ("%d %d", &n, &k);
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for (int i = 0; i < n; i++)
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{
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scanf ("%d", &num[i]);
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}
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sort (num, num + n);
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for (int i = 0; i < n; i++)
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{
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if (i == 0)
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{
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for (int j = i + 1; j <= n; j++)
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if ( (j < n && num[j] - num[i] > k) || (j == n))
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{
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pos[i] = j - 1;
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ans += j - i - 1;
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break;
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}
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}
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else
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{
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for (int j = pos[i - 1]; j <= n; j++)
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if ( (j < n && num[j] - num[i] > k) || j == n)
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{
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pos[i] = j - 1;
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ans += j - i - 1;
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break;
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}
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}
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}
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printf ("%I64d\n", ans);
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}
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return 0;
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}
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