1005 I Think I Need a Houseboat

#include<iostream>
#include<cmath>
#include<string>
#include<vector>

#define pi 3.1415926

using  namespace std;

int house(double r){
double squre=0;
int year=0;

while((r*r*pi/2)>squre){
squre+=50;
year++;
}

return year;
}

int main(){
int n;
cin>>n;
vector<int> result;

for(int i=0;i<n;i++){
double x;
double y;
double r;
cin>>x;
cin>>y;

r=pow(x*x+y*y,1.0/2.0);

int n = house(r);
result.push_back(n);
}

int index =1;
vector<int>::iterator it;
for(it=result.begin();it!=result.end();++it){
cout<<"Property "<<index++<<": This property will begin eroding in year "<<*it<<"."<<endl;
}

cout<<"END OF OUTPUT."<<endl;
return 0;
}