int main()
{
    int i=0,flag=0;
    char buffer[10000];
    gets(buffer);//however gets is dangerous
    
while(buffer[i])
    {
        if(flag) // spaced
        {
            if(buffer[i]!=' ')
            {
                printf("%c",buffer[i]);
                flag=0;//reset flag
            }
        }
        else if(!flag) //not spaced
        {
 
           printf("%c",buffer[i]);
            if(buffer[i]==' ')
                flag=1;//set flag
        }
        i++;
    }
    return 0;
}
