pair<unsigned int,vector<short int> > getSequence(ifstream& s){
vector<short int > sequence;
unsigned int num=0,i;
short int number;
char size[4],tmp_number[2];
s.readsome(size,4);
//read how many pair bytes are there for read
num = 0x00 | ((unsigned int)size[0]<<0) | ((unsigned int)size[1]<<8) | ((unsigned int)size[2]<<16) | ((unsigned int)size[3]<<24);
//and read them
for(i=0;i<num;i++){
s.readsome(tmp_number,2);
number = 0x00 | (tmp_number[0]<<0) | (tmp_number[1]<<8);
if (number>=0) sequence.push_back(number);
}
//return number of 2-byte elements in file, and vector which contains nonnegative numbers
return make_pair(num,sequence);
}
