ncif

#include <fstream>
#include <cmath>
using namespace std;

int main()
{
    int n,a,b;
    ifstream f("ncif.in");
    f>>n;
    ofstream g("ncif.out");
    while(n--)
    {
        f>>a>>b;
        g<<(int)(b*log10(a))+1<<'\n';
    }
    return 0;
}