Please give me test!

This is my program:

#include <stdio.h>
#include <string.h>

int main ()
{
    freopen ("input.txt","r",stdin);
    freopen ("output.txt","w",stdout);
    int n,q;
    char str[203][38] = {};
    char monitor[203][38] = {};
    int count = 0;
    int len = 0;
    scanf ("%d", &n);
    scanf ("%d%d", &n, &q);
    gets(str[0]);
    for (int i = 0; i < n; i++)
    {
        gets(str[i]);
        strcat(monitor[i],str[i]);
        len = strlen(str[i]);
        for (int j = 0; j < len; j++)
        {
            if (str[i][j] == '#') break;
            if ((str[i][j] < 97) && (str[i][j] != ' ') && (str[i][j] != '.') && (str[i][j] != '-') && (str[i][j] != '&') && (str[i][j] != '\n'))
                str[i][j] += 32;
        }
        if (str[i][len - 2] == '#')    str[i][len - 1] = '\0';

    }
    for (int i = 0; i < n; i++)
    {
        if (count == q)
        {
            printf ("%s", monitor[i]);
            return 0;
        }
        if (strlen(str[i]) != 0)
        {
            count++;
            for (int j = i + 1; j < n; j++)
                if (strcmp(str[i],str[j]) == 0) str[j][0] = '\0';
        }
    }
    return 0;
}