zoukankan      html  css  js  c++  java
  • 思维题(直角三角形)

    Katya studies in a fifth grade. Recently her class studied right triangles and the Pythagorean theorem. It appeared, that there are triples of positive integers such that you can construct a right triangle with segments of lengths corresponding to triple. Such triples are called Pythagorean triples.

    For example, triples (3, 4, 5), (5, 12, 13) and (6, 8, 10) are Pythagorean triples.

    Here Katya wondered if she can specify the length of some side of right triangle and find any Pythagorean triple corresponding to such length? Note that the side which length is specified can be a cathetus as well as hypotenuse.

    Katya had no problems with completing this task. Will you do the same?

    Input
    3
    Output
    4 5
    Input
    6
    Output
    8 10
    Input
    1
    Output
    -1
    Input
    17
    Output
    144 145
    Input
    67
    Output
    2244 2245


    给你一条边 ,问能不能有另外两条边使得这三条边构成直角三角形
    推个数学公式就解出来了


    #include <iostream>
    #include<cstdio>
    #include<cstring>
    #include<cstdlib>
    #include<algorithm>
    typedef long long int ll;
    using namespace std;
    int main()
    {
        ll n,i,b,c;
        scanf("%lld",&n);
        if(n%2!=0)
        {
            b=(n*n-1)/2;
            c=b+1;
            if(b==0||c==0)
                printf("-1
    ");
            else
                printf("%lld %lld
    ",b,c);
        }
        else
        {
            b=(n*n/2-2)/2;
            c=b+2;
            if(b==0||c==0)
                printf("-1
    ");
            else
                printf("%lld %lld
    ",b,c);
        }
    
    
        return 0;
    }
    
  • 相关阅读:
    dfs模板(真心不会深搜)
    背包九讲文档
    POJ3414—Pots(bfs加回溯)
    统计元音
    前m大的数(哈希入门)&&sort
    数据结构实验:哈希表
    More is better
    畅通工程&&How Many Tables
    OpenCV学习:Mat结构中的数据共享机制
    VC++ :实现简单的文件拖放(Drag and Drop)功能
  • 原文地址:https://www.cnblogs.com/bhd123/p/9458485.html
Copyright © 2011-2022 走看看