Submission #389919

#	Time	Username	Problem	Language	Result	Execution time	Memory
389919		null_awe	Tracks in the Snow (BOI13_tracks)	C++14	Compilation error	0 ms	0 KiB

tracks

#include <bits/stdc++.h>
using namespace std;

vector<int> dx{-1, 1, 0, 0}, dy{0, 0, -1, 1};

int main() {
  int h, w;
  cin >> h >> w;
  vector<string> field(h);
  vector<vector<int>> rank(h, vector<int>(w, 0));
  for (int i = 0; i < h; ++i) cin >> field[i];
  int m = 1;
  rank[0][0] = 1;
  deque<pair<int, int>> q;
  vector<int> first{0, 0};
  q.push_back(first);
  while (!q.empty()) {
    pair<int, int> s = q.front();
    m = max(m, rank[s.first][s.second]);
    q.pop_front();
    for (int i = 0; i < 4; ++i) {
      int x = s.first + dx[i], y = s.second + dy[i];
      if (x < 0 || y < 0 || x >= h || y >= w || rank[x][y] > 0 || field[x][y] == '.') continue;
      vector<int> add{x, y};
      int r = rank[s.first][s.second];
      if (field[s.first][s.second] == field[x][y]) {
        q.push_front(add);
        rank[x][y] = r;
      } else {
        q.push_back(add);
        rank[x][y] = r + 1;
      }
    }
  }
  cout << m;
  return 0;
}

Compilation message (stderr)

tracks.cpp: In function 'int main()':
tracks.cpp:16:20: error: no matching function for call to 'std::deque<std::pair<int, int> >::push_back(std::vector<int>&)'
   16 |   q.push_back(first);
      |                    ^
In file included from /usr/include/c++/9/deque:67,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:68,
                 from tracks.cpp:1:
/usr/include/c++/9/bits/stl_deque.h:1569:7: note: candidate: 'void std::deque<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = std::pair<int, int>; _Alloc = std::allocator<std::pair<int, int> >; std::deque<_Tp, _Alloc>::value_type = std::pair<int, int>]'
 1569 |       push_back(const value_type& __x)
      |       ^~~~~~~~~
/usr/include/c++/9/bits/stl_deque.h:1569:35: note:   no known conversion for argument 1 from 'std::vector<int>' to 'const value_type&' {aka 'const std::pair<int, int>&'}
 1569 |       push_back(const value_type& __x)
      |                 ~~~~~~~~~~~~~~~~~~^~~
/usr/include/c++/9/bits/stl_deque.h:1584:7: note: candidate: 'void std::deque<_Tp, _Alloc>::push_back(std::deque<_Tp, _Alloc>::value_type&&) [with _Tp = std::pair<int, int>; _Alloc = std::allocator<std::pair<int, int> >; std::deque<_Tp, _Alloc>::value_type = std::pair<int, int>]'
 1584 |       push_back(value_type&& __x)
      |       ^~~~~~~~~
/usr/include/c++/9/bits/stl_deque.h:1584:30: note:   no known conversion for argument 1 from 'std::vector<int>' to 'std::deque<std::pair<int, int> >::value_type&&' {aka 'std::pair<int, int>&&'}
 1584 |       push_back(value_type&& __x)
      |                 ~~~~~~~~~~~~~^~~
tracks.cpp:27:25: error: no matching function for call to 'std::deque<std::pair<int, int> >::push_front(std::vector<int>&)'
   27 |         q.push_front(add);
      |                         ^
In file included from /usr/include/c++/9/deque:67,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:68,
                 from tracks.cpp:1:
/usr/include/c++/9/bits/stl_deque.h:1532:7: note: candidate: 'void std::deque<_Tp, _Alloc>::push_front(const value_type&) [with _Tp = std::pair<int, int>; _Alloc = std::allocator<std::pair<int, int> >; std::deque<_Tp, _Alloc>::value_type = std::pair<int, int>]'
 1532 |       push_front(const value_type& __x)
      |       ^~~~~~~~~~
/usr/include/c++/9/bits/stl_deque.h:1532:36: note:   no known conversion for argument 1 from 'std::vector<int>' to 'const value_type&' {aka 'const std::pair<int, int>&'}
 1532 |       push_front(const value_type& __x)
      |                  ~~~~~~~~~~~~~~~~~~^~~
/usr/include/c++/9/bits/stl_deque.h:1547:7: note: candidate: 'void std::deque<_Tp, _Alloc>::push_front(std::deque<_Tp, _Alloc>::value_type&&) [with _Tp = std::pair<int, int>; _Alloc = std::allocator<std::pair<int, int> >; std::deque<_Tp, _Alloc>::value_type = std::pair<int, int>]'
 1547 |       push_front(value_type&& __x)
      |       ^~~~~~~~~~
/usr/include/c++/9/bits/stl_deque.h:1547:31: note:   no known conversion for argument 1 from 'std::vector<int>' to 'std::deque<std::pair<int, int> >::value_type&&' {aka 'std::pair<int, int>&&'}
 1547 |       push_front(value_type&& __x)
      |                  ~~~~~~~~~~~~~^~~
tracks.cpp:30:24: error: no matching function for call to 'std::deque<std::pair<int, int> >::push_back(std::vector<int>&)'
   30 |         q.push_back(add);
      |                        ^
In file included from /usr/include/c++/9/deque:67,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:68,
                 from tracks.cpp:1:
/usr/include/c++/9/bits/stl_deque.h:1569:7: note: candidate: 'void std::deque<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = std::pair<int, int>; _Alloc = std::allocator<std::pair<int, int> >; std::deque<_Tp, _Alloc>::value_type = std::pair<int, int>]'
 1569 |       push_back(const value_type& __x)
      |       ^~~~~~~~~
/usr/include/c++/9/bits/stl_deque.h:1569:35: note:   no known conversion for argument 1 from 'std::vector<int>' to 'const value_type&' {aka 'const std::pair<int, int>&'}
 1569 |       push_back(const value_type& __x)
      |                 ~~~~~~~~~~~~~~~~~~^~~
/usr/include/c++/9/bits/stl_deque.h:1584:7: note: candidate: 'void std::deque<_Tp, _Alloc>::push_back(std::deque<_Tp, _Alloc>::value_type&&) [with _Tp = std::pair<int, int>; _Alloc = std::allocator<std::pair<int, int> >; std::deque<_Tp, _Alloc>::value_type = std::pair<int, int>]'
 1584 |       push_back(value_type&& __x)
      |       ^~~~~~~~~
/usr/include/c++/9/bits/stl_deque.h:1584:30: note:   no known conversion for argument 1 from 'std::vector<int>' to 'std::deque<std::pair<int, int> >::value_type&&' {aka 'std::pair<int, int>&&'}
 1584 |       push_back(value_type&& __x)
      |                 ~~~~~~~~~~~~~^~~