'commit'

LuoGu/RuMen/P1296.cpp

@@ -0,0 +1,24 @@
+#include<bits/stdc++.h>
+
+using namespace std;
+//定义大数组，放在主函数外边
+int a[1000001], n, f, i, j, k;
+
+int main() {
+    cin >> n >> f;
+    for (i = 1; i <= n; ++i)
+        cin >> a[i];
+
+    k = 0;
+    //对数组进行一次排序
+    sort(a + 1, a + (n + 1));
+    //双重循环
+    for (i = 1; i < n; i++)
+        for (j = i + 1; j <= n; ++j) {
+            if (a[j] - a[i] > f)
+                break;
+            k++;
+        }
+    cout << k << endl;
+    return 0;
+}