hiiiii

the above mentioned idea is correct ... let me implement it properly ..

so for x = 1 we have y = 1 , 2, ... 19  .. 19 points ..

for x = 2 we have y = 1 , 2, ... 18  .. 18 points

.........

for x = 19 we have y = 1

for x = 20 .. no points ..

so total points are 1 + 2 + .. + 19 = 20.19/2 = 190 ans

cheers