# Given an integer array hours representing times in hours, return an integer denoting the number of pairs i, j where i < j and hours[i] + hours[j] forms a complete day. # A complete day is defined as ...
countX[i][j] = total X's from (0,0) to (i,j) countY[i][j] = total Y's from (0,0) to (i,j) ...
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