include [HTML_REMOVED]

using namespace std;
const int N = 110;
int T;
int n,d;
int a[N];
int main()
{
cin >> T;
while(T–)
{
cin >> n >> d;
for(int i=0;i[HTML_REMOVED]> a[i];
for(int i=1;i[HTML_REMOVED]0&&d-i>=0) //第i个位置移到a[0]处需要移动i次
{
a[i]–;
d=d-i;
a[0]++;
}
}
cout << a[0] << endl;
}
return 0;
}