Задача ИТМО. Второй отборочный тур.

ifmo8.cpp

#include <iostream>
#include <ostream>
#include <fstream>
#include <cmath>
#include <ctime>
#include <vector>
#include <algorithm>
#include <iterator>
#include <functional>
using namespace std;
std::pair<int,std::vector<int> > result;
typedef std::vector<int> vect;
typedef std::vector<int>::iterator it;
void pancake_sort(it first, it last)
{
    if (std::distance(first, last) < 2) return; 
 
    for (; first != last; --last)
    {
        it mid = std::max_element(first, last,std::less<int>());
        if (mid == last - 1)
        {
            continue; 
        }
        if (first != mid)
        {
			++result.first;
			result.second.push_back(mid-first+1);
            std::reverse(first, mid + 1);
        }
        std::reverse(first, last); 
		++result.first;
		result.second.push_back(last-first);
    }
}
 

int main()
{
	vector<int> x;
	fstream in("input.txt",fstream::in);
	fstream out("output.txt",fstream::trunc|fstream::out);
	int size;
	in>>size;
	x.reserve(size);
	for(int i=0,l=size;i<l;i++)
	{
		in>>size;x.push_back(size);
	}
	
	pancake_sort(x.begin(),x.end());
	out<<result.first<<endl;
	copy(result.second.begin(),result.second.end(),std::ostream_iterator<int>(out," "));
	return 0;
}