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Problem · Matrix

Find Number in Matrix 🌺

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● Easy

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Problem statement

Input

The first line of input consists of two space-separated integers- matrix_row and matrix_col, representing the number of rows in the matrix (N) and the number of columns in the matrix (M), respectively. The next M lines consist of N space-separated integers representing the elements of the matrix.

Output

Print a number which is largest in a row and smallest in a column in the given matrix. If no element is found print "-1".

Function

findNumberInMatrix(matrix: int[][]) → int

Examples

Example 1

matrix = [[1, 2], [3, 4]]return = 2

The number 2 at index (0,1) is the largest in its row and smallest in its column. So, the output is 2.

Constraints

1 ≤ N, M ≤ 1000
Note: Each number in the matrix is a non-negative integer.

Problem statement

Function

Examples

Example 1

Constraints

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