HDU 1017 简单数学题

A Mathematical Curiosity

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 26984    Accepted Submission(s): 8587

Problem Description

Given two integers n and m, count the number of pairs of integers (a,b) such that 0 < a < b < n and (a^2+b^2 +m)/(ab) is an integer.

This problem contains multiple test cases!

The first line of a multiple input is an integer N, then a blank line followed by N input blocks. Each input block is in the format indicated in the problem description. There is a blank line between input blocks.

The output format consists of N output blocks. There is a blank line between output blocks.

 

Input

You will be given a number of cases in the input. Each case is specified by a line containing the integers n and m. The end of input is indicated by a case in which n = m = 0. You may assume that 0 < n <= 100.

 

Output

For each case, print the case number as well as the number of pairs (a,b) satisfying the given property. Print the output for each case on one line in the format as shown below.

 

Sample Input

110 120 330 40 0

 

Sample Output

Case 1: 2Case 2: 4Case 3: 5

 
简单题：首先N的意思就是有N个组，其中每一组以m=n=0作为结束条件，另外每一组结束都要输出一空格作为结束条件，当N为0 时除外。

代码：

<span style="font-size:18px;">#include <iostream>#include <stdio.h>#include <stdlib.h>#include <iomanip>using namespace std;int main(){int N,n,m,num;cin>>N;while(N--){int flag=1;while(cin>>n>>m){if(n==0 && m==0)break;num=0;for(int a=1;a<n-1;++a){for(int b=a+1;b<n;++b){if((a*a+b*b+m)%(a*b)==0)num++;}}cout<<"Case "<<flag++<<": "<<num<<endl;}if(N!=0)cout<<endl;}return 0;}</span>