poj1005 I Think I Need a Houseboat 水题
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Cpoj1005 I Think I Need a Houseboat
题意:FM正在考虑在路易斯安那州购买一些土地来建他自己的房子,但他发现密西西比河岸某处陆地因为河水侵蚀,每年陆地面积都在减少,每年减少50平方英里,减少的陆地面积呈半圆形,即该半圆形面积以每年50平方英里的速度增长。在第一年初时,该半圆形面积为0,半圆形的圆心坐标为(0,0),现在的任务是给定一个坐标,求出该坐标在哪一年年底会被河水侵蚀。假设给定的坐标到圆心的距离不会等于半圆的半径。
输入:第一行输入坐标个数,第二行开始输入坐标,每个坐标占一行,每个坐标由横坐标和纵坐标组成。
输出:输出该坐标会在哪一年年底开始被河水侵蚀。(输出结束后输出 “END OF OUTPUT.”)
题解:
整理ing
AC_Code(cpp):
#include<iostream>using namespace std;const double PI=3.14159;int main(){ int n; cin >> n; for (int i = 1; i <= n; i++) { double x, y; cin >> x >> y; double R = x*x + y*y; int year = PI*R / 100 + 1; cout << "Property " << i << ": This property will begin eroding in year " << year << "." << endl; } cout << "END OF OUTPUT." << endl; return 0;}
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