SG1Test
Test Failed
Your path is too long or wrong
Expected: 23.142135623730955d +/- 9.9999999999999995E-08d
But was: 23.384776310850242d

why my path wrong? my path is shorter by 1 cell

One possible path:
.X.X.X....XXXXXX...X
XX.XX.XXXXXXXXXXX..X
.X.X.XX..X..X.XXXXXX
X.X..XXX...XX.X.XXX.
X.X..X..XXX.X.X.X...
.XXX..XXXXX.X.X..XX.
X.XX.SX......XXX..X.
.XXXXXPXXX...XXP.X..
....XPXX..X.XXPXP.XX
....X.PXX..XXP.XPXX.
X...X.PXX.X.XPXX.PPX
.XXX...PPPPPPX.XX..G
..XX.XX.XX.X.XXXXXX.
.X.X...X.X.XXXX..X.X
..X..XXX.XX....XXXX.
XX..XXXXXXX.....XXXX
XXXX.X.X..XXXXXX...X
X...X..X..XXXX..X..X
X.XXXXX..XX..XXX.X.X
XX.X.XX.XXXX.X..X.XX

Your path:
.X.X.X....XXXXXX...X
XX.XX.XXXXXXXXXXX..X
.X.X.XX..X..X.XXXXXX
X.X..XXX...XX.X.XXX.
X.X..X..XXX.X.X.X...
.XXX..XXXXX.X.X..XX.
X.XX.SXPPP...XXX..X.
.XXXXXPXXXP..XXP.X..
....X.XX.PX.XXPXP.XX
....X..XX.PXXP.XPXX.
X...X..XX.XPXPXX.PPX
.XXX........PX.XX..G
..XX.XX.XX.X.XXXXXX.
.X.X...X.X.XXXX..X.X
..X..XXX.XX....XXXX.
XX..XXXXXXX.....XXXX
XXXX.X.X..XXXXXX...X
X...X..X..XXXX..X..X
X.XXXXX..XX..XXX.X.X
XX.X.XX.XXXX.X..X.XX

sry, i dont know how to show anymore