Given a matrix of order m*n then the task is to find the frequency of even and odd numbers in matrix
Examples:
Input : m = 3, n = 3 { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 } Output : Frequency of odd number = 5 Frequency of even number = 4 Input : m = 3, n = 3 { 10, 11, 12 }, { 13, 14, 15 }, { 16, 17, 18 } Output : Frequency of odd number = 4 Frequency of even number = 5
PHP
<?php // PHP Program to Find the frequency // of even and odd numbers in a matrix $MAX = 100; // function for calculating frequency function freq( $ar , $m , $n ) { $even = 0; $odd = 0; for ( $i = 0; $i < $m ; ++ $i ) { for ( $j = 0; $j < $n ; ++ $j ) { // modulo by 2 to check // even and odd if (( $ar [ $i ][ $j ] % 2) == 0) ++ $even ; else ++ $odd ; } } // print Frequency of numbers echo " Frequency of odd number = " , $odd ," "; echo " Frequency of even number = " , $even ; } // Driver code $m = 3; $n = 3; $array = array ( array (1, 2, 3), array (4, 5, 6), array (7, 8, 9)); freq( $array , $m , $n ); // This code is contributed by anuj_67. ?> |
Output:
Frequency of odd number = 5 Frequency of even number = 4
Time Complexity: O(m*n)
Auxiliary Space: O(1)
Please refer complete article on Frequencies of even and odd numbers in a matrix for more details!
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