Home php教程 php手册 把1316这个数表示成两个数的和,其中一个为13的倍数,另一个是11的倍数,求这两个数。

把1316这个数表示成两个数的和,其中一个为13的倍数,另一个是11的倍数,求这两个数。

Jun 13, 2016 pm 12:08 PM
two number for multiple analyze and Bundle yes of algorithm express

算法分析:

1316,显然1300是13的倍数,但16不是11的倍数,可以想到从1300上任意减去N个13的倍数其结果仍然是13的倍数,那么只要16加上这个减去的N个13的倍数其和是11的倍数,这两个数就解出来了,答案可能不只一个,但是我们只求一对解就可以了。

仔细观察不难发现:(16+13*3)+(1300-13*3)=1316,但是我们需要用代码实现:

复制代码 代码如下:


$n=1316;
$i=0;//减去的第N个13,进行初始化为0
$y=16+13*$i;//1316分出来的16加上N个13,这里初始化为16
while($y%11!=0){//如果16加上N个13的和不能整除11
$i++;//再加一个13
$y=16+13*$i;
}

echo '$x='.($n-$y).'
';
echo '$y='.$y;
?>

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