CodeForces/A_Equal_Subsequences.cpp at master · Ash8389/CodeForces · GitHub

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#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

void solve()
{
    int n, k;
    cin >> n >> k;

    for (int i = 0; i < k; i++)
    {
        cout << '1';
    }
    for (int i = 0; i < n - k; i++)
    {
        cout << '0';
    }

    cout << endl;
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    int t;
    cin >> t;

    while (t--)
    {
        solve();
    }

    return 0;
}