heres my code
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
int *a;
int  count(char *s)
{
    int i=0,j=0;
    while(!(s[i]>='0' && s[i]<='9'))
        i++;
    while(s[i])
    {
        if(s[i]>='0' && s[i]<='9')
        {
            if(i==0 || !(s[i-1]>='0'&& s[i-1]<='9'))
                j++;
        }
        i++;
    }
    return j;
}


int main(void)
{
    int l,n,num=0,k=0,i=0,x,y,countspace=0,j=0;
    char c,s[10000]="",c1=0;
    char s1[500];
    scanf("%d",&n);
    a=(int*)malloc((k+1)*sizeof(int));
    fflush(stdin);
    while(j<n)
    {
        fgets(s1,sizeof(s1)-1,stdin);
        s1[strlen(s1)-1]=0;
        j+=count(s1);
        strcat(s,s1);
    }
    l=strlen(s);
    i=0;
    do{
            if(i>=l)
                break;
            c=s[i++];
            if(c>='0' && c<='9')
                num=num*10+c-'0';
            else
            {
                if(c==' ')
                {
                    if((c1>='0' && c1<='9'))
                        countspace++;
                }
                if(num>0)
                        a[k++]=num;
                num=0;
                if(countspace==n-1)
                    break;
            }
            c1=c;
        }while(1);
    while(1)
    {
           if(i>=l)
                break;
            c=s[i++];
            if(c>='0' && c<='9')
                break;
    }
    while(c>='0' && c<='9')
    {
                num=num*10+c-'0';
                if(i>=l)
                    break;
                c=s[i++];
    }
    a[k]=num;
    for(i=0;i<=k;)
    {
        x=a[i];
        y=0;
        while(a[i]==x && i<=k)
        {
            y++;
            i++;
        }
        if(i<=k)
            printf("%d %d ",y,a[i-1]);
        else
            printf("%d %d",y,a[i-1]);
     }
     return 0;
}
please help with some test cases.