#include <iostream>
#include <fstream>
#include <iomanip>
#include <vector>
#include <set>
#include <map>
#include <cstring>
#include <string>
#include <cmath>
#include <cassert>
#include <ctime>
#include <algorithm>
#include <sstream>
#include <list>
#include <queue>
#include <deque>
#include <stack>
#include <cstdlib>
#include <cstdio>
#include <iterator>
#include <functional>
#include <unordered_set>
#include <unordered_map>
#include <stdio.h>
#include <bitset>
#include <cstdint>
#include <cassert>
#include <functional>
#include <complex>
#include <random>
using namespace std;
#define ll long long
#define pb push_back
#define mp make_pair
#define f first
#define s second
#define ld long double
const ll maxn = 3e3 + 10, maxm = 20 + 1;
const ll mod = 1e9 + 7, cmod = 998244353, inf = 1e9, blcok = 400, p2 = 31;
const ld eps = 1e-9;
int s, n, a[maxn][maxn], p[maxn], sz[maxn], dep[maxn], color[maxn], used[maxn], par[maxn];
vector<int> comps[maxn];
vector<pair<int, int>> z[maxn];
vector<int> g[maxn];
void dfs(int v = 1, int p = 0, int cur = 1){
if (p){
++cur;
if (a[1][v] == cur){
color[v] = v;
}
else{
--cur;
vector<int> vec;
int is = v, prv = 1;
while (is != 1){
is = par[is];
if (used[color[is]] == 0){
int x = a[is][v];
if (x == prv){
color[v] = color[is];
break;
}
++prv;
}
used[color[is]] = 1;
}
for (int j = 1; j <= n; ++j){
used[j] = 0;
}
}
}
for (auto to : g[v]){
if (to != p){
par[to] = v;
dfs(to, v, cur);
}
}
}
int get(int v){
if (v == p[v])
return v;
return p[v] = get(p[v]);
}
void unite(int a, int b){
a = get(a), b = get(b);
if (a == b)
return;
if (sz[a] > sz[b])
swap(a, b);
p[a] = b;
sz[b] += sz[a];
}
int main(){
ios_base::sync_with_stdio(false);
cin.tie(0);
cin >> s;
cin >> n;
for (int i = 1; i <= n; ++i){
for (int j = 1; j <= n; ++j){
cin >> a[i][j];
}
}
if (s == 1){
for (int i = 1; i <= n; ++i){
p[i] = i, sz[i] = 1;
dep[i] = i;
}
for (int i = 1; i <= n; ++i){
for (int j = 1; j <= n; ++j){
if (a[i][j] == 1){
unite(i, j);
}
}
}
int root = get(1);
for (int i = 1; i <= n; ++i){
if (get(i) == root){
color[i] = 1;
}
else{
color[i] = 2;
}
comps[get(i)].pb(i);
cout << color[i] << " ";
}
cout << '\n';
vector<pair<int, int>> ans;
for (int i = 1; i <= n; ++i){
int sz = (int)comps[i].size() - 1;
for (int j = 0; j < sz; ++j){
ans.pb(mp(comps[i][j], comps[i][j + 1]));
}
if ((int)comps[i].size() > 0 && i != root){
ans.pb(mp(comps[i][0], root));
}
}
for (auto it : ans){
cout << it.f << " " << it.s << '\n';
}
}
else if (s == 2){
int cur = 0;
for (int i = 1; i <= n; ++i){
++cur;
if (a[1][i] == cur){
color[i] = i;
}
else{
--cur;
int prv = 1;
for (int j = i - 1; j >= 1; --j){
if (used[color[j]] == 0){
int x = a[j][i];
if (x == prv){
color[i] = color[j];
break;
}
++prv;
}
used[color[j]] = 1;
}
for (int j = 1; j <= i; ++j){
used[color[j]] = 0;
}
}
cout << color[i] << " ";
}
cout << '\n';
for (int i = 1; i < n; ++i){
cout << i << " " << i + 1 << '\n';
}
}
else{
vector<pair<int, int>> ans;
for (int i = 1; i <= n; ++i){
for (int j = i + 1; j <= n; ++j){
z[a[i][j]].pb(mp(i, j));
}
}
for (int i = 1; i <= n; ++i){
p[i] = i, sz[i] = 1;
dep[i] = i;
}
for (int i = 1; i <= n; ++i){
for (auto it : z[i]){
if (get(it.f) != get(it.s)){
int ver = dep[it.f];
unite(ver, it.s);
g[ver].pb(it.s);
g[it.s].pb(ver);
ans.pb(mp(ver, it.s));
}
}
}
color[1] = 1;
dfs();
for (int i = 1; i <= n; ++i){
cout << color[i] << " ";
}
cout << '\n';
for (auto it : ans){
cout << it.f << " " << it.s << '\n';
}
}
}
/*
*/
