t = int(input())
for _ in range(t):
a, b = map(int, input().split())
res = ""
while a != 0 and b != 0:
res += '10'
a -= 1
b -= 1
res += '0'*a
res += '1'*b
print(res)#include <bits/stdc++.h>
using namespace std;
#define ll long long int
ll sol()
{
ll a,b,c,z=1;
cin>>a>>b;
if(a<b)
{
c=b-a;
}
else if(b<a)
{
c=a-b;
}
else
{
c=1;
}
while(b!=0 || a!=0)
{
for(ll i=1;i<=c;i++)
{
if(z==1 && b>0)
{
cout<<'1';
b--;
}
if(b==0)
{
z=0;
break;
}
if(c==i)
{
z=0;
}
}
for(ll i=1;i<=c;i++)
{
if(z==0 && a>0)
{
cout<<'0';
a--;
}
if(a==0)
{
z=1;
break;
}
if(c==i)
{
z=1;
}
}
}
cout<<endl;
return 0;
}
int main() {
ll t;
cin>>t;
while(t--)
{
ll a=sol();
}
}1296B - Food Buying | 133A - HQ9+ |
1650D - Twist the Permutation | 1209A - Paint the Numbers |
1234A - Equalize Prices Again | 1613A - Long Comparison |
1624B - Make AP | 660B - Seating On Bus |
405A - Gravity Flip | 499B - Lecture |
709A - Juicer | 1358C - Celex Update |
1466B - Last minute enhancements | 450B - Jzzhu and Sequences |
1582C - Grandma Capa Knits a Scarf | 492A - Vanya and Cubes |
217A - Ice Skating | 270A - Fancy Fence |
181A - Series of Crimes | 1638A - Reverse |
1654C - Alice and the Cake | 369A - Valera and Plates |
1626A - Equidistant Letters | 977D - Divide by three multiply by two |
1654B - Prefix Removals | 1654A - Maximum Cake Tastiness |
1649A - Game | 139A - Petr and Book |
1612A - Distance | 520A - Pangram |