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#include "message.h"
#include "teatr.h"

#include <iostream>
#include <cstdio>
#include <sstream>
#include <fstream>
#include <string>
#include <vector>
#include <queue>
#include <algorithm>
#include <map>
#include <set>
#include <vector>

using namespace std;

typedef unsigned long long LL;

#define MAX(a, b) ((a) > (b) ? (a) : (b))
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define ABS(val) ((val) < 0 ? -(val) : (val))

#define FOR(x, b, e) for(int x = b; x <= (e); ++x)
#define FORD(x, b, e) for(int x = b; x >= (e); --x)
#define REP(x, n) for(int x = 0; x < (n); ++x)
#define VAR(v, n) __typeof(n) v = (n)
#define ALL(c) (c).begin(), (c).end()
#define SIZE(x) ((int)(x).size())
#define FOREACH(i, c) for(VAR(i, (c).begin()); i != (c).end(); ++i)
#define PB push_back
#define ST first
#define ND second

#define M 1000000007ULL

/* PA2018 TEA (BASIC IMPL) */

using namespace std;

const int MAX_ELEM = 20;

int less_than [MAX_ELEM] = {};
int more_than [MAX_ELEM] = {};
int tmp [MAX_ELEM] = {};

int X[102][MAX_ELEM];

int elems[1000100];

int main() {

	int id = MyNodeId();
	int nodes = NumberOfNodes();
  
	int rows = GetN();

	int range = rows / nodes + 1;

	int my_beg = range * id;
	int my_end = range * (id + 1);
	if (id == nodes - 1)
	{
		my_end = rows + 1;
	}

//	cout << "range " << range << endl;
	for (int i = my_beg; i < my_end; i++)
	{
		if (i >= rows)
			break;

	//	cout << i << "from id " <<  id << endl;
		int elem = GetElement(i);	
		elems[i - my_beg] = elem;

		for (int j = 0; j < MAX_ELEM; j++)
		{
			if (elem < j)
			{
				less_than[j]++;
			}
			else if (elem > j)
			{
				// (elem >= j)
				more_than[j]++;
			} 
		}
	}
	
	for (int i = 0; i < nodes; i++)
	{
		if (i == id)
			continue;

		for (int j = 0; j < MAX_ELEM; j++)
		{
			PutInt(i, more_than[j]);
		}
		Send(i);
	}

	for (int i = 0; i < nodes; i++)
	{
		if (i == id)
			continue;
		
		Receive(i);

		for (int j = 0; j < MAX_ELEM; j++)
		{
			X[i][j] = GetInt(i);
		}
	}

	LL contr = 0LL;
	for (int i = my_beg; i < my_end; i++)
	{
		if (i >= rows)
			break;

		int elem = elems[i - my_beg];

		for (int j = 0; j < id; j++)
		{
			contr += (LL)(X[j][elem]);
		}

		contr += (LL)(tmp[elem]);
	
		for (int j = 0; j < MAX_ELEM; j++)
		{
			if (elem > j)
			{
				tmp[j]++;
			} 
		}
	}

	if (id != 0)
	{
		PutLL(0, contr);
		Send(0);
	}
	else
	{
		LL sum = contr;
		for (int i = 1; i < nodes; i++)
		{
			Receive(i);
			sum += GetLL(i);
		}
		cout << sum;	
	}
	
	
	



#if 0
	cout << "Less than (id = " << id  << "):\n";
	for (int j = 0; j < MAX_ELEM; j++)
	{
		cout << "ID(" << id << "): [" << j << "] = " << less_than[j] << endl;
	}
	
	cout << "More or eq (id = " << id << "):\n";
	for (int j = 0; j < MAX_ELEM; j++)
	{
		cout << "ID(" << id << "): [" << j << "] = " << more_than[j] << endl;
	}
#endif
	
}