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myCpps/!-OJcreater.cpp

@@ -12,7 +12,7 @@
 using namespace std;
 
 //***************************************
-const string CPPfile = "miceAndMaze_UVA1112"; //*
+const string CPPfile = "WiFi_UVA11516"; //*
 //***************************************
 
 ifstream fin(CPPfile + ".cpp");

myCpps/WiFi_UVA11516.cpp

@@ -0,0 +1,83 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+ifstream fin("WiFi_UVA11516.in");
+ofstream fout("WiFi_UVA11516.out");
+
+int _abs(int x)
+{
+    if (x > 0) return x;
+    else return -x;
+}
+
+bool check(int d, int n, vector<int> & a)
+{
+    if (d == 3)
+    {
+        for (int __s = 0; __s == 0; ++__s);
+    }
+
+    int p = a[0] + d, i = 1, m = a.size();
+    --n;
+
+    while (true)
+    {
+        while (_abs(a[i] - p) <= d && i <= m - 1)
+        {
+            ++i;
+        }
+
+        if (i >= m)
+        {
+            return true;
+        }
+        else if (n == 0)
+        {
+            return false;
+        }
+        else
+        {
+            p = a[i] + d;
+            --n;
+        }
+    }
+}
+
+int main()
+{
+    fout << fixed << setprecision(1);
+
+    int testCase; fin >> testCase;
+    for (int t = 1; t <= testCase; ++t)
+    {
+        int n, m; fin >> n >> m;
+
+        vector<int> a(m);
+        for (int i = 0; i <= m - 1; ++i)
+        {
+            fin >> a[i]; a[i] *= 2;
+        }
+
+        sort(a.begin(), a.end());
+
+        int l = 0, r = 2000000;
+        while (l < r)
+        {
+            int d = (l + r) / 2;
+
+            if (check(d, n, a) == true)
+            {
+                r = d;
+            }
+            else
+            {
+                l = d + 1;
+            }
+        }
+
+        fout << (double)l / 2.0 << '\n';
+    }
+
+    return 0;
+}