1005.cpp

北大ACM题库中的部分已AC题目源码（1001

#include<iostream>
#include<cmath>
using namespace std;

int main()
{

	int N;
	float x,y;
	float sum;
	int i;

	cin>>N;
	int * year;
	year=new int[N];
	for(i=0;i<N;i++)
	{
		cin>>x>>y;
		sum=3.1415926*(x*x+y*y)/2;
		year[i]=((int)sum)/50;
		if(sum>year[i]*50)
			year[i]++;
	}

	for(i=0;i<N;i++)
		cout<<"Property "<<i+1<<": This property will begin eroding in year "<<year[i]<<"."<<endl;
	cout<<"END OF OUTPUT.";
	return 0;
}