奇偶数的蛋糕

C - C
Time Limit:2000MS Memory Limit:32768KB 64bit IO Format:%lld & %llu
Submit Status

Description

Ekka and his friend Dokka decided to buy a cake. They both love cakes and that's why they want to share the cake after buying it. As the name suggested that Ekka is very fond of odd numbers and Dokka is very fond of even numbers, they want to divide the
cake such that Ekka gets a share ofN square centimeters and Dokka gets a share of M square centimeters where N is odd and M is even. Both N and M are positive
integers.

They want to divide the cake such that N * M = W, where W is the dashing factor set by them. Now you know their dashing factor, you have to find whether they can buy the desired cake or not.

Input

Input starts with an integer T (≤ 10000), denoting the number of test cases.

Each case contains an integer W (2 ≤ W < 263). And W will not be a power of 2.

Output

For each case, print the case number first. After that print "Impossible" if they can't buy their desired cake. If they can buy such a cake, you have to print N and M. If there are multiple solutions, then
print the result where M is as small as possible.

Sample Input

3

10

5

12

Sample Output

Case 1: 5 2

Case 2: Impossible

Case 3: 3 4

#include<stdio.h>

#include<math.h>

int main()

{

long long a,x,n,t,k;

scanf("%d",&n);

for (t=1;t<=n;t++)

{

scanf("%lld",&x);

k=0;

for (a=1;x/2*2==x;a=a*2)

{

x=x/2;

k=1;

}

if (k==1)

printf("Case %d: %lld %lld\n",t,x,a);

else

printf("Case %d: Impossible\n",t);

}

return 0;

}

此题注意：要求一个奇数，一个偶数，偶数还要是最小偶数，所以可以一直用2除x;最后得到a,x;