int main()
{
int x, y, z = 0, count = 1;
while ( x != EOF)
{
cin >> x >> y;

while( x < y )
{
z = x + 1;
x += z;
count++;
}
cout << count << endl;
count = 1;
}

return 0;
}

想請問大家，為什麼會TLE?