【POJ1005】I Think I Need a Houseboat

说是计算几何，其实是一道水题。直接算半圆面积即可。

 

 1 #include <iostream>

 2 #include <cstdlib>

 3 #include <cstdio>

 4 #include <cstring>

 5 #include <cctype>

 6 #include <numeric>

 7 #include <cmath>

 8 #include <algorithm>

 9 

10 #define PI acos(-1)

11 

12 using namespace std;

13 int main () {

14     //cout << PI << endl;

15     ios :: sync_with_stdio(false);

16     int T; cin >> T;

17     int cnt = 0;

18     while (T --) {

19         double x, y;

20         cin >> x >> y;

21         double S = 0.5 * (x * x + y * y) * PI / 50.0;

22         //cout << S << endl;

23         int ans = ceil(S);

24         printf ("Property %d: This property will begin eroding in year %d.\n", ++ cnt, ans);

25         if (T == 0) {

26             printf ("END OF OUTPUT.\n");

27         }

28     }

29     return 0;

30 }