#include
using namespace std;
int main()
{int T,a[100],b[100],c[100],i;
cin>>T;
cout<<endl;
//to get the input:
for(i=0;i<T;i++)
{cin>>a[i]>>b[i]>>c[i];
cout<<endl;
}
//core code of the problem:
for(i=0;i<T;i++)
{
while(c[i])
{if(a[i]>b[i])
{b[i]++;
c[i]--;
}
else if(b[i]>a[i])
{a[i]++;
c[i]--;
}
else if(a[i]==b[i])
{a[i]++;
c[i]--;
}
}
if(a[i]>b[i])
cout<<a[i]-b[i]<<endl;
else
cout<<b[i]-a[i]<<endl;
}
return 0;
}