9560. Two-dimensional array – input, output

A two-dimensional array of size n * m is given. Read the elements of the array, then print them.

Input. The first line contains two integers n and m (n, m ≤ 100) – the number of rows and columns in the array. The next n lines each contain m integers, the elements of the array. All numbers have an absolute value not exceeding 100.

Output. Print n rows, each containing m integers – the elements of the array.

Sample input	Sample output
4 5 1 3 2 4 5 4 2 7 6 5 9 2 3 5 1 7 8 1 7 2	1 3 2 4 5 4 2 7 6 5 9 2 3 5 1 7 8 1 7 2

SOLUTION

two-dimensional array

Algorithm analysis

Read the input matrix into a two-dimensional array. Then print it.

Algorithm implementation

Declare the two-dimensional array.

int a[101][101];

Read the sizes of the array n and m.

scanf("%d %d", &n, &m);

Read the input array.

for (i = 1; i <= n; i++)

for (j = 1; j <= m; j++)

scanf("%d", &a[i][j]);

Print the array.

for (i = 1; i <= n; i++)

{

for (j = 1; j <= m; j++)

printf("%d ", a[i][j]);

printf("\n");

}

Java implementation

import java.util.*;

public class Main

{

public static void main(String[] args)

{

Scanner con = new Scanner(System.in);

int n = con.nextInt();

int m = con.nextInt();

int a[][] = new int[n+1][m+1];

for (int i = 1; i <= n; i++)

for (int j = 1; j <= m; j++)

a[i][j] = con.nextInt();

for (int i = 1; i <= n; i++)

{

for (int j = 1; j <= m; j++)

System.out.print(a[i][j] + " ");

System.out.println();

}

}

}

Python implementation

Read the sizes of the array n and m.

n, m = map(int,input().split())

Read the input array.

a = [[] for i in range(n)]

for i in range(n):

a[i] = list(map(int, input().split()))

Print the array.

for i in range(n):

for j in range(m):

print(a[i][j],end = " ")

print()

Python implementation – second solution

Read the sizes of the array n and m.

n, m = map(int,input().split())

Read the input array.

a = [[int(j) for j in input().split()] for i in range(n)]

Print the array.

for _ in a:

for x in _:

print(x,end=" ")

print()

Python implementation – third solution

Read the input data.

n, m = map(int,input().split())

a = [list(map(int, input().split())) for _ in range(n)]

Print the array.

for _ in a:

for x in _:

print(x,end=" ")

print()