POJ ( acm.pku.edu.cn ) 1005

#include <iostream>
#include <math.h>
using namespace std;
typedef unsigned int uint;

uint f(float x,float y){
  float area=(x*x+y*y)/2.*3.141592652589793238;
  return ceil(area/50.);
}

int main()
{
  int N;cin>>N;
  for(int i=1;i<=N;++i) {
      float x,y; cin>>x>>y;
      cout<<"Property "<<i<<": This property will begin eroding in year "
          <<f(x,y)<<".\n";
  }
  cout<<"END OF OUTPUT.";
  return 0;
}