Create 1018.cpp

POJ/1018.cpp

@@ -0,0 +1,79 @@
+#include <cstdio>
+#include <cstring>
+#include <cstdlib>
+
+#include <algorithm>
+using namespace std;
+#define INF 0x3f3f3f3f
+#define NINF 0xc0c0c0c0
+struct _device
+{
+    int b,p;
+};
+_device info[105][205];
+int infocnt[105];
+
+int GlobalMin=INF;
+int GlobalLinerMin;
+
+int LinerMax[105];
+
+int main()
+{
+    int t;
+    scanf("%d",&t);
+    while(t--)
+    {
+        int n;
+        scanf("%d",&n);
+        /// Input & Find Global Min
+        for(int i=0;i<n;i++)
+        {
+            scanf("%d",&infocnt[i]);
+            LinerMax[i]=NINF;
+            for(int j=0;j<infocnt[i];j++)
+            {
+                scanf("%d %d",&info[i][j].b,&info[i][j].p);
+                GlobalMin=min(GlobalMin,info[i][j].b);
+                LinerMax[i]=max(LinerMax[i],info[i][j].b);
+            }
+        }
+        /// Find GlobalLinerMin in LinerMax
+        GlobalLinerMin=INF;
+        for(int i=0;i<n;i++)
+        {
+            GlobalLinerMin=min(GlobalLinerMin,LinerMax[i]);
+        }
+
+        /// Enumerate B from GlobalMin to GlobalLinerMin
+        double MaxRate=-1;
+        for(int B=GlobalMin;B<=GlobalLinerMin;B++)
+        {
+            int PSUM=0;
+            int BMIN=INF;
+            /// Enumerate in each type
+            for(int i=0;i<n;i++)
+            {
+                /// Find A Device whose Bi > B and P is the min.
+                int minp=INF;
+                int minb=INF;
+                for(int j=0;j<infocnt[i];j++)
+                {
+                    if(info[i][j].b>=B)
+                    {
+                        if(minp>info[i][j].p)
+                        {
+                            minp=info[i][j].p;
+                            minb=min(minb,info[i][j].b);
+                        }
+                    }
+                }
+                PSUM+=minp;
+                BMIN=min(BMIN,minb);
+            }
+            MaxRate=max(MaxRate,(double)BMIN/PSUM);
+        }
+        printf("%.3f\n",MaxRate);
+    }
+    return 0;
+}