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myCpps/!-OJcreater.cpp

@@ -12,7 +12,7 @@
 using namespace std;
 
 //***************************************
-const string CPPfile = "NEW_findingNemo_UVA1202"; //*
+const string CPPfile = "bestCoalitions_UVA11658"; //*
 //***************************************
 
 ifstream fin(CPPfile + ".cpp");

myCpps/bestCoalitions_UVA11658.cpp

@@ -0,0 +1,67 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+ifstream fin("bestCoalitions_UVA11658.in");
+ofstream fout("bestCoalitions_UVA11658.out");
+
+const int N = 10000;
+
+int main()
+{
+    fout << fixed << setprecision(2);
+    while (true)
+    {
+        int n = 0, x = 0; fin >> n >> x;
+        if (n + x == 0) break;
+
+        vector<int> a(n + 1, 0);
+        for (int i = 1; i <= n; ++i)
+        {
+            double temp; fin >> temp;
+            a[i] = (int)(temp * 100 + 0.5);
+        }
+
+        if (a[x] > 5000)
+        {
+            fout << "100.00\n";
+            continue;
+        }
+
+        int _max = N - a[x];
+
+        vector<int> dp(N + 1, 0); dp[0] = 1;
+        for (int i = 1; i <= n; ++i)
+        {
+            if (i == x) continue;
+            for (int j = _max - a[i]; j >= 0; --j)
+            {
+                if (dp[j] == 1)
+                {
+                    dp[j + a[i]] = 1;
+                }
+            }
+        }
+
+        // for (int i = 0; i <= N; ++i)
+        // {
+        //     if (dp[i] == 1)
+        //     {
+        //         fout << i << '\n';
+        //     }
+        // }
+
+        int other = 5001 - a[x];
+        while (dp[other] == 0)
+        {
+            ++other;
+        }
+
+        double now_d = a[x], other_d = other;
+        double ans = 100.0 * now_d / (now_d + other_d);
+
+        fout << ans << '\n';
+    }
+
+    return 0;
+}