You are given a matrix N*N with even M and N and binary value in each cell •You are allowed to click on each cell. When you do this you change the value on the corresponding row and column to the opposite value •You need to fill the matrix with zeros using this operation •Number of clicks should be minimal possible Input data: First line: single number N. N is even. Then N lines follow, each contains N integers. Output data: The list of clicks. Describe each click as two integers, R and C, representing row and column you want to click respectively. Order them first by row, then by column. Sample input: 4 0 1 0 0 1 1 1 1 0 1 0 0 0 1 0 0 Sample output: 2 2 Sample input: 4 1 0 1 0 0 1 0 1 1 0 1 0 0 1 0 1 Sample output: 1 1 1 3 2 2 2 4 3 1 3 3 4 2 4 4