Graph input

#include<stdio.h>
int main()
{
    int n;
    printf("Enter the Number of NODE: ");
    scanf("%d",&n);
    int a[n][n],i,j;
    for(i=0;i<n;i++)
    {
        for(j=0;j<n;j++)
        {
            scanf("%d",&a[i][j]);
        }
        printf("NEXT NODE\n");
    }
    printf("The Matrix is:\n");
    for(i=0;i<n;i++)
    {
        for(j=0;j<n;j++)
        {
            printf("%d  ",a[i][j]);

        }
        printf("\n");
    }
}