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#include "kollib.h"
#include <iostream>
#include <message.h>
#include <set>
#include <vector>
#include <stdlib.h>     /* srand, rand */
#include <time.h>       /* time */
#include <map>
#include <algorithm>
using namespace std;

const int INF = 1000000009;
const int repeat = 20; 
const int n = NumberOfNodes();
const int students = NumberOfStudents();
int p;

void mainC() {
	srand (time(NULL));
	int q = NumberOfQueries();
	pair<int, int> Q[q];
	p =( (2*q+repeat*(n-1) ) / (n-1) ) * (n-1);
	set<int> S; 
	for(int i = 1; i<=q; i++) {
		int a = QueryFrom(i), b=QueryTo(i);
		if(S.count(a) == 0) S.insert(a);
		if(S.count(b) == 0) S.insert(b);
		Q[i] = make_pair(a, b);
	}
	while(S.size() < p) {
		int x = rand()%students;
		x++;
		if(S.count(x) == 0) S.insert(x);
	}
	vector<int> V (S.begin(), S.end());
	random_shuffle(V.begin(), V.end());
	//for(int i = 0; i<V.size(); i++) printf("%d ", V[i]);
	//printf("\n");
	//printf("%d\n", p); 
	map<int, int> M;
	for(int i = 0; i<V.size(); i++) M.insert(make_pair(V[i], i));
	
	for(int i = 1; i<n; i++) {
		PutInt(i, V.size());
		for(int j = 0; j<V.size(); j++)	PutInt(i, V[j]);
		Send(i);
	}
	map<int, pair<pair<int, int>, pair<int, int> > > G;
	for(int j = 0; j<p/(n-1); j++) {	
		for(int i = 1; i<n; i++) {
			int inst = Receive(-1);
			int x = GetInt(inst);
			int y = GetInt(inst);
			int d = GetInt(inst);
			//printf("Odleglosc z %d->%d do %d->%d wynosi %d\n", x, M[x], y, M[y], d);
			int y2 = GetInt(inst);
			int d2 = GetInt(inst);
			G.insert(make_pair(M[x], make_pair(make_pair(M[y], d), make_pair(M[y2], d2))));
			//printf("Odleglosc z %d do %d wynosi %d\n", x, y, d);
		}
	}
	/*for(int i = 0; i<p; i++) {
		for(int j = 0; j<p; j++) printf("%d ", G[i][j]);
		printf("\n");
	}*/
	int D[p+1];
	D[0] = 0;
	int w = 0;
	int s = G[0].first.first;
	D[s] = G[0].first.second;
	//printf("XXXXXXXXXXXXXX\n");
	for(int i = 1; i<p-1; i++) {
		int x = G[s].first.first;
		if(x == w) {
			x = G[s].second.first;
			D[x] = D[s] + G[s].second.second;
		} else D[x] = D[s] + G[s].first.second;
		w = s;
		s = x;
	} 
	//printf("XXXXXXXXXXXXXX\n");
	//for(int i = 0; i<p; i++) printf("%d ", D[i]);
	//printf("\n");
	for(int i = 1; i<=q; i++) {
		int x = abs(D[M[Q[i].first]] - D[M[Q[i].second]]);
		printf("%d\n", min(x, students-x));
	}
}

void otherC() {
	
	Receive(0);
	int p = GetInt(0);
	set<int> S;
	vector<int> V;
	for(int i = 0; i<p; i++) {
		int x = GetInt(0);
		S.insert(x);
		V.push_back(x);
	}
	//printf("Maszyna %d przyjęła %d i zajmuje się %d\n", myNumber, S.size(), V[myNumber]);
	for(int k = 0; k<(p/(n-1)); k++) {
	int myNumber = k*(n-1)+MyNodeId()-1;
	int where = V[myNumber], sup = FirstNeighbor(V[myNumber]);
	int counter = 1;
	while(S.count(sup) == 0) {
		int a = FirstNeighbor(sup);
		if(a == where) a = SecondNeighbor(sup);
		where = sup;
		sup = a;
		counter++;
	}
	PutInt(0, V[myNumber]);
	PutInt(0, sup);
	PutInt(0, counter);
	where = V[myNumber]; sup = SecondNeighbor(V[myNumber]);
	counter = 1;
	while(S.count(sup) == 0) {
		int a = FirstNeighbor(sup);
		if(a == where) a = SecondNeighbor(sup);
		where = sup;
		sup = a;
		counter++;
	}
	PutInt(0, sup);
	PutInt(0, counter);
	Send(0);
	}
}

int main() {	
	if(students < 100000) {
		if(MyNodeId() != 0) return 0;
		int where = 1, sup = FirstNeighbor(1);
		int counter = 1;
		int students = NumberOfStudents();
		int D[students+1];
		D[1] = 0;
		while(sup != 1) {
			D[sup] = counter;
			int a = FirstNeighbor(sup);
			if(a == where) a = SecondNeighbor(sup);
			where = sup;
			sup = a;
			counter++;
		}
		int q = NumberOfQueries();
		for(int i = 1; i<=q; i++) {
			int a = QueryFrom(i), b=QueryTo(i);
			int x = abs(D[a] - D[b]);
			printf("%d\n", min(x, students-x));
		}
		return 0;
	}
	if(MyNodeId() == 0) mainC();
	else otherC();
	return 0;
}