来源:http://poj.org/problem?id=1005
怎么POJ前面的题都那么水= =
#include <iostream> #include <cstdio> #include <cmath> using namespace std; #define pi 3.1415926 int main() { int N; cin>>N; for (int Ncase=1;Ncase<=N;Ncase++) { double x,y; cin>>x>>y; double k=x*x+y*y; double kk=k*pi/2; int s=floor(kk/50.0)+1; cout<<"Property "<<Ncase<<": This property will begin eroding in year "<<s<<"."<<endl; } cout<<"END OF OUTPUT."<<endl; return 0; }