基础数学：..

#include
     
      using namespace std;typedef unsigned long long ULL;int main(){    int t;    scanf("%d",&t);    for(int kase = 1; kase <= t; ++kase)    {        ULL W;        scanf("%llu", &W);        ULL N, M = 1;        if(W % 2) M = 1;        else {            while(W % 2 == 0) {                M <<= 1;                W >>= 1;            }            N = W;        }        printf("Case %d: ",kase);        if(M == 1) puts("Impossible");        else printf("%llu %llu\n", N, M);    }}