delete pics to save space

2.815.cpp

@@ -0,0 +1,46 @@
+#include<cstdio>
+#include<algorithm>
+using namespace std;
+#define maxn 900
+int i,j,cases,n,m,tot,t;
+int a[maxn];
+double sum,high,per;
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	while(scanf("%d%d",&n,&m)==2)
+	{
+		if(n==0&&m==0) return 0;
+		for(i=1;i<=n*m;i++)
+			scanf("%d",&a[i]);
+		scanf("%lf",&sum);
+		sum/=100;
+		sort(a+1,a+n*m+1);
+		for(i=2;i<=n*m;i++)
+		{
+			tot=(a[i]-a[i-1])*(i-1);
+			if(sum>=tot)
+			{
+				sum-=tot;
+			}
+			else
+			{
+				high=a[i-1]+sum/(i-1);
+				sum=0;
+				per=(double)(i-1)/n/m;
+				break;
+			}
+		}
+		if(sum)//ÑÍûÕû¸öµØÇøÈÔÓÐÊ£Óà
+		{
+			high=a[n*m]+sum/n/m;
+			per=1;
+		}
+		printf("Region %d\n",++cases);
+		printf("Water level is %.2lf meters.\n",high);
+		printf("%.2lf percent of the region is under water.\n\n",per*100);
+	}
+	return 0;
+}