百度面试题——裁剪网格纸
分类:Interview
题目:
度度熊有一张网格纸,但是纸上有一些点过的点,每个点都在网格点上,若把网格看成一个坐标轴平行于网格线的坐标系的话,每个点可以用一对整数x,y来表示。度度熊必须沿着网格线画一个正方形,使所有点在正方形的内部或者边界。然后把这个正方形剪下来。问剪掉正方形的最小面积是多少。
输入描述:
第一行一个数n(2≤n≤1000)表示点数,接下来每行一对整数xi,yi(-1e9<=xi,yi<=1e9)表示网格上的点
输出描述:
一行输出最小面积
输入例子:
2
0 0
0 3
输出例子:
9
分析:
分别求得x坐标和y坐标的最大差值,再求二者的最大值。
算法代码:
int cutGridPaper(int n, int X[], int Y[]) { int minimunArea = 0; int minXLength, maxXLength, minYLength, maxYLength, XLength, YLength; minXLength = maxXLength = X[0]; minYLength = maxYLength = Y[0]; for (int i = 0; i < n; ++i) { if (X[i] > maxXLength) { maxXLength = X[i]; } if (X[i] < minXLength) { minXLength = X[i]; } if (Y[i] > maxYLength) { maxYLength = Y[i]; } if (Y[i] < minYLength) { minYLength = Y[i]; } } XLength = abs(maxXLength - minXLength); YLength = abs(maxYLength - minYLength); if (XLength > YLength) { minimunArea = XLength * XLength; } else { minimunArea = YLength * YLength; } return minimunArea; }
测试代码:
// // main.cpp // cutGridPaper // // Created by Jiajie Zhuo on 2017/4/23. // Copyright © 2017年 Jiajie Zhuo. All rights reserved. // #include <iostream> #include <cmath> using namespace std; int cutGridPaper(int n, int X[], int Y[]); int main(int argc, const char * argv[]) { int n; cout << "Please enter the number of point n: "; cin >> n; int X[n]; int Y[n]; cout << "Please enter the coordinates of points: "; for (int i = 0; i < n; ++i) { cin >> X[i] >> Y[i]; } cout << "The minimun area of the square is " << cutGridPaper(n, X, Y) << endl; return 0; }
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