pku acm 1005

#include <iostream>#include <cmath>using namespace std;const float PI = 3.1515926;const int AREA = 50;int year(float x,float y){x = fabs(x);int k = 0;int area;//面積float r;//半徑float dis = sqrt(pow(x,2)+pow(y,2));for(k = 1;; k++){r = sqrt((k*AREA*2*1.0)/PI);if(r > dis)break;}return k;}int main(){int count;float x,y;freopen("in.txt","r",stdin);cin>>count;int k = 1;while(k <= count){cin>>x>>y;cout<<"Property "<<k<<": This property will begin eroding in year "<<year(x,y)<<"."<<endl;k++;}cout<<"END OF OUTPUT."<<endl;    return 0; }

測試資料如下：

3
1.0 1.0
25.0 0.0
-25.0 0.0