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вернуться в форумIf you don't know why you get WA...look at here. (ADMIN, too!) One key word that is not mentioned clearly in the problem is that we can NOT place a "-" to the cell IF the cell is not "-" currently. This can make many programmes WA. For example, for n = 1, this code is NOT acceptable: 3 1 - 2 + > 2 # 2 # < 2 + 2 - = (Here we can NOT replace a "+" with a "-") while this one is acceptable: 4 1 - 2 - > 2 - 3 - < 2 # 4 # < 3 - 1 + > Hope the ADMIN to make it clear in the STATEMENT. This problem has driven me crazy for months!!! Good luck. |
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