Column 1 has 1 points.
The second column has two points.
The point on the x axis is the second point.
There are three points in the third column.
The point on the X axis is 1+2+ 1 point.
. . . .
N columns have n points.
The point on the x axis is 1+2+. . +(n- 1)+ 1 point
The first n columns * * * have (1+2 ...+n) = n (n+1)/2 points.
Calculate the column where point 100 is located.
100 & lt; =n(n+ 1)/2
200 & lt=n(n+ 1)
n(n+ 1)>=200
N = 14 satisfies the minimum upper inequality.
So the focus is on the 14 column.
The former 13 column * * has13 *14/2 = 91.
The point 100 is on the column 14, and the position of 100-9 1 = 9 is calculated from bottom to top in this column, so the coordinate is (14,8).