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  • <cf>System of Equations(水题)

    System of Equations
    time limit per test
    2 seconds
    memory limit per test
    256 megabytes
    input
    standard input
    output
    standard output

    Furik loves math lessons very much, so he doesn't attend them, unlike Rubik. But now Furik wants to get a good mark for math. For that Ms. Ivanova, his math teacher, gave him a new task. Furik solved the task immediately. Can you?

    You are given a system of equations:

    You should count, how many there are pairs of integers (a, b) (0 ≤ a, b) which satisfy the system.

    Input

    A single line contains two integers n, m (1 ≤ n, m ≤ 1000) — the parameters of the system. The numbers on the line are separated by a space.

    Output

    On a single line print the answer to the problem.

    Sample test(s)
    input
    9 3
    
    output
    1
    
    input
    14 28
    
    output
    1
    
    input
    4 20
    
    output
    0
    
    Note

    In the first sample the suitable pair is integers (3, 0). In the second sample the suitable pair is integers(3, 5). In the third sample there is no suitable pair.

    #include <stdio.h>
    int main()
    {
        int n,m;
        int cnt;
        while(scanf("%d%d",&n,&m)!=EOF)
       {
            cnt=0;
            for(int i=0;i*i<=n;i++)
            {
                double j=n-i*i;
                if((int)j==j && j*j+i==m)
                    cnt++;
            }
            printf("%d\n",cnt);
       }
       return 0;
    }
    


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  • 原文地址:https://www.cnblogs.com/cszlg/p/2910586.html
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