3 5 12 +----------+ TNNNYNNYNNYT TNNNNNNNNNNT TYNNYYYYYYYT TYNYNYYYNYNT TNNNINYNNNYT 10 10 +--------+ TNNNYYNNNT TYYNNNNNYT TNYNNNNYYT TNYYNNNYNT TNNYNNYYNT TNNYYNYNNT TNNNYYYNNT TNNNYYNNNT TNNNNYNNYT TINNNNNNYT 10 10 +--------+ TNNNYYNNNT TYYNNNNNYT TNYNNNNYYT TNYYNNNYNT TNNYNNYYNT TNNYYNYNNT TNNNYYYNNT TNNNYYNNNT TNNNNYNNYT TINNNNNNNT 40 take stairs at the right from floor 0 to floor 1 take stairs at the left from floor 1 to floor 2 take stairs at the right from floor 2 to floor 3 take stairs at the right from floor 3 to floor 4 93 take stairs at the right from floor 0 to floor 1 take stairs at the right from floor 1 to floor 2 take stairs at the left from floor 2 to floor 3 take stairs at the right from floor 3 to floor 4 take stairs at the left from floor 4 to floor 5 take stairs at the right from floor 5 to floor 6 take stairs at the left from floor 6 to floor 7 take stairs at the right from floor 7 to floor 8 take stairs at the left from floor 8 to floor 9 87 take stairs at the left from floor 0 to floor 1 take stairs at the right from floor 1 to floor 2 take stairs at the left from floor 2 to floor 3 take stairs at the right from floor 3 to floor 4 take stairs at the left from floor 4 to floor 5 take stairs at the right from floor 5 to floor 6 take stairs at the left from floor 6 to floor 7 take stairs at the right from floor 7 to floor 8 take stairs at the left from floor 8 to floor 9