int lineUp(string commands) { var b = true; var count = 0; foreach (var c in commands) if ((c == 'L' || c == 'R') && b) b = false; else if ((c == 'L' || c == 'R') && !b) { b = true; count++; } else if (c == 'A') if (b) count++; return count; }
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