59 lines
1.3 KiB
C++
59 lines
1.3 KiB
C++
#include <iostream>
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#include <cstdio>
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using namespace std;
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int main()
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{
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int t;
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int T,b;
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int ans;
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scanf("%d",&t);
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while(t--)
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{
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scanf("%d %d",&T,&b);
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ans = 0;
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if(90 % b)
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{
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cout<<"Impossible!"<<endl;
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}
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else
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{
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if(T == 1 )
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{
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for(int i=9; i>=1; i--)
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{
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if(i % b == 0)
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{
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ans = i;
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break;
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}
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}
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if(ans)
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{
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cout<<ans<<endl;
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}
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else
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{
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cout<<"Impossible!"<<endl;
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}
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}
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else
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{
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for(int i=99; i>=10; i--)
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{
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if(i % b == 0)
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{
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ans = i;
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break;
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}
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}
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for(int k=3; k<=T; k++)
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{
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cout<<"9";
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}
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cout<<ans<<endl;
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}
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}
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}
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return 0;
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}
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