#include <bits/stdc++.h>
using namespace std;
const int dy[] = {-1, 0, 1, 0}, dx[] = {0, 1, 0, -1};
const double EPS = 1e-8;
const double PI = acos(-1.0);
int popcount(int n) { return __builtin_popcount(n); }
int popcount(long long n) { return __builtin_popcountll(n); }
template <class T>
int SIZE(T a) {
  return a.size();
}
template <class T>
string IntToString(T num) {
  string res;
  stringstream ss;
  ss << num;
  return ss.str();
}
template <class T>
T StringToInt(string str) {
  T res = 0;
  for (int i = 0; i < SIZE(str); i++) res = (res * 10 + str[i] - '0');
  return res;
}
template <class T>
T gcd(T a, T b) {
  if (b == 0) return a;
  return gcd(b, a % b);
}
template <class T>
T lcm(T a, T b) {
  return a / gcd(a, b) * b;
}
template <class T>
void PrintSeq(T &a, int sz) {
  for (int i = 0; i < sz; i++) {
    cout << a[i];
    if (sz == i + 1)
      cout << endl;
    else
      cout << ' ';
  }
}
long long getTen(int a) { return (a <= 0) ? 1 : (getTen(a - 1) * 10); }
bool EQ(double a, double b) { return abs(a - b) < EPS; }
void fastStream() {
  cin.tie(0);
  std::ios_base::sync_with_stdio(0);
}
vector<string> split(string str, char del) {
  vector<string> res;
  for (int i = 0, s = 0; i < SIZE(str); i++) {
    if (str[i] == del) {
      if (i - s != 0) res.push_back(str.substr(s, i - s));
      s = i + 1;
    } else if (i == SIZE(str) - 1) {
      res.push_back(str.substr(s));
    }
  }
  return res;
}
int H, W, K;
int main() {
  cin >> H >> W >> K;
  vector<pair<int, int> > poss;
  int sum = 0;
  for (int i = 0;; i++) {
    for (int j = 0; j <= i; j++) {
      int x = j;
      int y = i - j;
      if (x >= 0 && y >= 0 && x < W && y < H) {
        poss.push_back(pair<int, int>(y, x));
        sum += (y + x + 1);
      }
      if ((int)poss.size() == K) break;
    }
    if ((int)poss.size() == K) break;
  }
  cout << sum << endl;
  for (int i = (int)poss.size() - 1; i >= 0; i--) {
    int y = poss[i].first;
    int x = poss[i].second;
    int initx = 0;
    int inity = 0;
    cout << "(";
    cout << inity + 1 << ",";
    cout << initx + 1;
    cout << ")";
    cout << " ";
    while (initx + 1 <= x) {
      initx++;
      cout << "(";
      cout << inity + 1 << ",";
      cout << initx + 1;
      cout << ")";
      cout << " ";
    }
    while (inity + 1 <= y) {
      inity++;
      cout << "(";
      cout << inity + 1 << ",";
      cout << initx + 1;
      cout << ")";
      cout << " ";
    }
    cout << endl;
  }
  return 0;
}
