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Warning: session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in /var/www/tb-usercake/models/config.php on line 51
static BWImage invertImageInPlace(BWImage bw) { if (bw != null) { int[] pixels = bw.data; int n = pixels.length; for i to n: pixels[i] = ~pixels[i]; } ret bw; }