Problem p03496 (C++)

Buggy submission (status: Runtime Error):
#include <cassert>
#include <cctype>
#include <cerrno>
#include <cfloat>
#include <ciso646>
#include <climits>
#include <clocale>
#include <cmath>
#include <csetjmp>
#include <csignal>
#include <cstdarg>
#include <cstddef>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
/*
//#if __cplusplus >= 201103L
#include <ccomplex>
#include <cfenv>
#include <cinttypes>
#include <cstdbool>
#include <cstdint>
#include <ctgmath>
#include <cwchar>
#include <cwctype>
*/

// C++
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <locale>
#include <map>
#include <memory>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>
/*
//#if __cplusplus >= 201103L
#include <array>
#include <chrono>
#include <condition_variable>
#include <forward_list>
#include <future>
#include <initializer_list>
#include <mutex>
#include <random>
#include <ratio>
#include <regex>
#include <scoped_allocator>
#include <system_error>
#include <thread>
#include <tuple>
#include <type_traits>
#include <typeindex>
#include <unordered_map>
#include <unordered_set>
*/
using namespace std;
#define fi first
#define se second
#define repl(i, a, b) for (int i = (int)(a); i < (int)(b); i++)
#define rep(i, n) repl(i, 0, n)
#define each(itr, v) for (auto itr : v)
#define pb(s) push_back(s)
#define mmax(x, y) (x > y ? x : y)
#define mmin(x, y) (x < y ? x : y)
#define maxch(x, y) x = mmax(x, y)
#define minch(x, y) x = mmin(x, y)
#define mp(a, b) make_pair(a, b)
#define all(x) (x).begin(), (x).end()
#define dbg(x) cout << #x "=" << x << endl

#define uni(x) x.erase(unique(all(x)), x.end())
template <class T, class U> inline void chmin(T &t, U f) {
  if (t > f)
    t = f;
}
template <class T, class U> inline void chmax(T &t, U f) {
  if (t < f)
    t = f;
}
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#define MIN(a, b) ((a) > (b) ? (b) : (a))

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> P;
typedef pair<P, int> PPI;

#define INF INT_MAX / 3
#define MAX_N 1000
#define M_INF 1000000000
int n, m, v, i, j;
void solve() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  cin >> n;
  std::vector<ll> a(n);
  ll MAX = 0, tag = 1;
  repl(i, 1, n + 1) {
    cin >> a[i];
    if (abs(MAX) < abs(a[i])) {
      MAX = a[i];
      tag = i;
    }
  }
  cout << 2 * n - 1 << endl;
  rep(i, n) cout << tag << ' ' << i + 1 << endl;
  if (MAX < 0) {
    for (int j = n - 1; j > 0; j--)
      cout << j + 1 << " " << j << endl;
  } else {
    for (int j = 2; j <= n; j++)
      cout << j - 1 << " " << j << endl;
  }
}
int main() {
  solve();
  return 0;
}


Fixed submission:
#include <cassert>
#include <cctype>
#include <cerrno>
#include <cfloat>
#include <ciso646>
#include <climits>
#include <clocale>
#include <cmath>
#include <csetjmp>
#include <csignal>
#include <cstdarg>
#include <cstddef>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
/*
//#if __cplusplus >= 201103L
#include <ccomplex>
#include <cfenv>
#include <cinttypes>
#include <cstdbool>
#include <cstdint>
#include <ctgmath>
#include <cwchar>
#include <cwctype>
*/

// C++
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <locale>
#include <map>
#include <memory>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>
/*
//#if __cplusplus >= 201103L
#include <array>
#include <chrono>
#include <condition_variable>
#include <forward_list>
#include <future>
#include <initializer_list>
#include <mutex>
#include <random>
#include <ratio>
#include <regex>
#include <scoped_allocator>
#include <system_error>
#include <thread>
#include <tuple>
#include <type_traits>
#include <typeindex>
#include <unordered_map>
#include <unordered_set>
*/
using namespace std;
#define fi first
#define se second
#define repl(i, a, b) for (int i = (int)(a); i < (int)(b); i++)
#define rep(i, n) repl(i, 0, n)
#define each(itr, v) for (auto itr : v)
#define pb(s) push_back(s)
#define mmax(x, y) (x > y ? x : y)
#define mmin(x, y) (x < y ? x : y)
#define maxch(x, y) x = mmax(x, y)
#define minch(x, y) x = mmin(x, y)
#define mp(a, b) make_pair(a, b)
#define all(x) (x).begin(), (x).end()
#define dbg(x) cout << #x "=" << x << endl

#define uni(x) x.erase(unique(all(x)), x.end())
template <class T, class U> inline void chmin(T &t, U f) {
  if (t > f)
    t = f;
}
template <class T, class U> inline void chmax(T &t, U f) {
  if (t < f)
    t = f;
}
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#define MIN(a, b) ((a) > (b) ? (b) : (a))

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> P;
typedef pair<P, int> PPI;

#define INF INT_MAX / 3
#define MAX_N 1000
#define M_INF 1000000000
int n, m, v, i, j;
void solve() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  cin >> n;
  std::vector<ll> a(55);
  ll MAX = 0, tag = 1;
  repl(i, 1, n + 1) {
    cin >> a[i];
    if (abs(MAX) < abs(a[i])) {
      MAX = a[i];
      tag = i;
    }
  }
  cout << 2 * n - 1 << endl;
  rep(i, n) cout << tag << ' ' << i + 1 << endl;
  if (MAX < 0) {
    for (int j = n - 1; j > 0; j--)
      cout << j + 1 << " " << j << endl;
  } else {
    for (int j = 2; j <= n; j++)
      cout << j - 1 << " " << j << endl;
  }
}
int main() {
  solve();
  return 0;
}