Function findMissingInteger

The function/method findMissingInteger accepts three arguments R, C and matrix. The integers R and C represent the size of the integer matrix. The given matrix contains a series of R*C consecutive positive integers but exactly one integer is missing. The missing integer is denoted by -1 in the matrix.

The function/method findMissingInteger must find the missing integer and replace -1 with the missing integer in the matrix.

Note: The first and last values in the series of R*C consecutive positive integers are always present in the matrix.

Your task is to implement the function findMissingInteger so that the program runs successfully.

IMPORTANT: Do not implement the main() function as it is already defined.

Example Input/Output 1:
Input:
3 3
2 9 7
6 3 1
-1 5 8

Output:
2 9 7
6 3 1
4 5 8

Explanation:
Here R = 3 and C = 3.
The matrix contains all the positive integers from 1 to 9, but 4 is missing.
Hence -1 is replaced with 4.
2 9 7
6 3 1
4 5 8

Example Input/Output 2:
Input:
5 4
30 23 21 28
29 19 11 25
22 13 15 -1
20 17 18 14
26 24 16 12

Output:
30 23 21 28
29 19 11 25
22 13 15 27
20 17 18 14
26 24 16 12

#include <stdio.h>
#include <stdlib.h>
void findMissingInteger(int R, int C, int matrix[R][C])
{
    int min=99999999,max=0,i,j;
    int arr[10000]={0};
    for(i=0;i<R;i++)
    {
        for(j=0;j<C;j++)
        {
            arr[matrix[i][j]]++;
            if(matrix[i][j]>max)
            {
                max=matrix[i][j];
            }
            if(matrix[i][j]<min && matrix[i][j]!=-1)
            {
                min=matrix[i][j];
            }
        }
    }
    int val;
    for(i=min;i<max;i++)
    {
        if (arr[i]==0)
        {
            val=i;
        }
    }
    for(i=0;i<R;i++)
    {
        for(j=0;j<C;j++)
        {
            if(matrix[i][j]==-1)
            {
                matrix[i][j]=val;
                break;
            }
        }
    }
}
int main()
{
    int R, C;
    scanf("%d %d", &R, &C);
    int matrix[R][C];
    for(int row = 0; row < R; row++)
    {
        for(int col = 0; col < C; col++)
        {
            scanf("%d", &matrix[row][col]);
        }
    }
    findMissingInteger(R, C, matrix);
    for(int row = 0; row < R; row++)
    {
        for(int col = 0; col < C; col++)
        {
            printf("%d ", matrix[row][col]);
        }
        printf("n");
    }
    return 0;
}