Problem p02614 (C++) — buggy submission, verdict: Runtime Error

#include <bits/stdc++.h>
using namespace std;
#define endl '\\n'
template <typename A, typename B> string to_string(pair<A, B> p);

template <typename A, typename B, typename C>
string to_string(tuple<A, B, C> p);

template <typename A, typename B, typename C, typename D>
string to_string(tuple<A, B, C, D> p);

string to_string(const string &s) { return '"' + s + '"'; }

string to_string(const char *s) { return to_string((string)s); }

string to_string(bool b) { return (b ? "true" : "false"); }

string to_string(vector<bool> v) {
  bool first = true;
  string res = "{";
  for (int i = 0; i < static_cast<int>(v.size()); i++) {
    if (!first) {
      res += ", ";
    }
    first = false;
    res += to_string(v[i]);
  }
  res += "}";
  return res;
}

template <size_t N> string to_string(bitset<N> v) {
  string res = "";
  for (size_t i = 0; i < N; i++) {
    res += static_cast<char>('0' + v[i]);
  }
  return res;
}

template <typename A> string to_string(A v) {
  bool first = true;
  string res = "{";
  for (const auto &x : v) {
    if (!first) {
      res += ", ";
    }
    first = false;
    res += to_string(x);
  }
  res += "}";
  return res;
}

template <typename A, typename B> string to_string(pair<A, B> p) {
  return "(" + to_string(p.first) + ", " + to_string(p.second) + ")";
}

template <typename A, typename B, typename C>
string to_string(tuple<A, B, C> p) {
  return "(" + to_string(get<0>(p)) + ", " + to_string(get<1>(p)) + ", " +
         to_string(get<2>(p)) + ")";
}

template <typename A, typename B, typename C, typename D>
string to_string(tuple<A, B, C, D> p) {
  return "(" + to_string(get<0>(p)) + ", " + to_string(get<1>(p)) + ", " +
         to_string(get<2>(p)) + ", " + to_string(get<3>(p)) + ")";
}

void debug_out() { cerr << endl; }

template <typename Head, typename... Tail> void debug_out(Head H, Tail... T) {
  cerr << " " << to_string(H);
  debug_out(T...);
}

#ifndef ONLINE_JUDGE
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#else
#define debug(...) 42
#endif
int main(int argc, char const *argv[]) {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(0);
  int h, w, k;
  cin >> h >> w >> k;
  string grid[h];
  for (int i = 0; i < h; i++)
    cin >> grid[i];
  int res = 0;
  for (int mask = 0; mask < (1 << (h + w)); mask++) {
    int cnt = 0;
    for (int col = 0; col < w; col++) {
      for (int row = 0; row < h; row++) {
        if (grid[row][col] != '#')
          continue;
        if ((mask & ((1 << col) | (1 << (w + row)))) != 0)
          continue;
        cnt++;
      }
    }
    if (cnt == k)
      res++;
  }
  cout << res << endl;
}

Error: -11

Fixed submission:

#include <bits/stdc++.h>
using namespace std;
#define endl '\\n'
int main(int argc, char const *argv[]) {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(0);
  int h, w, k, res = 0;
  cin >> h >> w >> k;
  vector<string> grid(h);
  for (int i = 0; i < h; i++)
    cin >> grid[i];
  for (int mask = 0; mask < (1 << (h + w)); mask++) {
    int cnt = 0;
    for (int col = 0; col < w; col++) {
      for (int row = 0; row < h; row++) {
        if (grid[col][row] != '#')
          continue;
        if ((mask & ((1 << col) | (1 << (w + row)))) != 0)
          continue;
        cnt++;
      }
    }
    if (cnt == k)
      res++;
  }
  cout << res << endl;
}