Question

How to check if a matrix rows contain numbers without repetition in Go

Answer 1

package main

import (
	"fmt"
)

func rowsHaveUniqueNumbers(matrix [][]int) bool {
	for _, row := range matrix {
		seen := make(map[int]bool)
		for _, num := range row {
			if seen[num] {
				// Number is repeated in the row
				return false
			}
			seen[num] = true
		}
	}
	return true
}

func main() {
	matrix := [][]int{
		{1, 2, 3},
		{4, 5, 6},
		{7, 8, 7}, // 7, 7
	}

	if rowsHaveUniqueNumbers(matrix) {
		fmt.Println("All rows contain unique numbers.")
	} else {
		fmt.Println("Some rows contain repeated numbers.")
	}
}



/*
run:

Some rows contain repeated numbers.

*/

 

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