{"trustable":false,"sections":[{"title":"","value":{"format":"MD","content":"In how many ways can you tile a 2 × n rectangle by 2 × 1 or 2 × 2 tiles?\n\n##### INPUT\nInput is a sequence of lines, each line containing an integer number 0 ≤ n ≤ 250.\n\n##### OUTPUT\nFor each line of input, output one integer number in a separate line giving the number of possible tilings of a 2 × n rectangle.\n\n##### SAMPLE INPUT\n2\n8\n12\n100\n200\n\n##### SAMPLE OUTPUT\n3\n171\n2731\n845100400152152934331135470251\n1071292029505993517027974728227441735014801995855195223534251"}}]}