#include
#include
#include
using namespace std;
int main(){
int m,n,h=1;
while(cin>>m>>n){
int d[900],sum[900],w,i;
for(int i=0;i>d[i];
sort(d,d+m*n);
cin>>w;
sum[0]=d[0];
for(i=1;i
for(i=1;i
if((d[i]*i-sum[i-1])*100>=w) break;
cout<<"Region "<<h++<<endl;
printf("Water level is %.2f
meters.\n",(w/100.00+sum[i-1])/i);
meters.\n",(w/100.00+sum[i-1])/i);
printf("%.2f percent of the region is under
water.\n\n",100.00*i/(m*n));
water.\n\n",100.00*i/(m*n));
}
return 0;
}