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GCD2

GCD2 - GCD2


#include <iostream>
#include <string>

using namespace std;

long long int gcd(long long int a, long long int b)
{
    if(a == 0)
        return b;
    return gcd(b % a, a);

}

long long int reduceNumber(long long int a, string s)
{
    long long  int r = 0;

    for(int i = 0; i < s.size(); i++)
    {
        r = r * 10 + (s[i] - '0');
        r = r % a;
    }

    return r;
}


int main()
{
    int n;
    cin >> n;

    long long int a, b;
    string s;

    while(n--)
    {
        cin >> a;

        cin >> s;

        if(!a)
        {
            cout << s << endl;
            continue;
        }

        b = reduceNumber(a, s);

        cout << gcd(a, b) << endl;
    }
    return 0;
}

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