POJ 1005
#include<iostream>
#include<math.h>
#define pi 3.1415926
using namespace std;
int main(){
int N;
double *px;
double *py;
double s_r;
cin>>N;
px=(double *)new double[N];
py=(double *)new double[N];
for(int s=0;s<N;s++){
cin>>px[s];
cin>>py[s];
}
int N1=N;
for(int i=0;i<N;i++){
s_r=sqrt(px[i]*px[i]+py[i]*py[i]);
s_r=s_r*s_r*pi;
s_r/=2;
for(N1=1;50*(N1-1)<=s_r; N1++)
if(50*N1>=s_r)
cout<<"Property "<<i+1<<": This property will begin eroding in year "<<N1<<"."<<endl;
}
cout<<"END OF OUTPUT.";
return 0;
}
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