Submission #1186577

#	Time	Username	Problem	Language	Result	Execution time	Memory
1186577		versesrev	Game (IOI14_game)	C++20	Compilation error	0 ms	0 KiB

game

#include <deque>

int n{};
std::vector<std::vector<bool>> edges;

void initialize(int _n) {
  n = _n;
  edges.assign(n, std::vector<bool>(n, true));
  for (int i = 0; i < n; ++i) {
    edges[i][i] = false;
  }
}

int hasEdge(int u, int v) {
  edges[u][v] = edges[v][u] = false;
  
  std::deque<int> queue;
  std::vector<bool> visited(n);
  int count = 0;
  queue.push_back(u), visited[u] = true, ++count;
  while (not queue.empty()) {
    int cur = queue.front(); queue.pop_front();
    for (int nxt = 0; nxt < n; ++nxt) {
      if (edges[cur][nxt] and not visited[nxt]) {
        queue.push_back(nxt), visited[nxt], ++count;
      }
    }
  }
  
  if (count != n) {
    edges[u][v] = edges[v][u] = true;
  }
  
  return edges[u][v];
}

Compilation message (stderr)

game.cpp:4:6: error: 'vector' in namespace 'std' does not name a template type
    4 | std::vector<std::vector<bool>> edges;
      |      ^~~~~~
game.cpp:2:1: note: 'std::vector' is defined in header '<vector>'; did you forget to '#include <vector>'?
    1 | #include <deque>
  +++ |+#include <vector>
    2 | 
game.cpp: In function 'void initialize(int)':
game.cpp:8:3: error: 'edges' was not declared in this scope
    8 |   edges.assign(n, std::vector<bool>(n, true));
      |   ^~~~~
game.cpp:8:24: error: 'vector' is not a member of 'std'
    8 |   edges.assign(n, std::vector<bool>(n, true));
      |                        ^~~~~~
game.cpp:8:24: note: 'std::vector' is defined in header '<vector>'; did you forget to '#include <vector>'?
game.cpp:8:31: error: expected primary-expression before 'bool'
    8 |   edges.assign(n, std::vector<bool>(n, true));
      |                               ^~~~
game.cpp: In function 'int hasEdge(int, int)':
game.cpp:15:3: error: 'edges' was not declared in this scope
   15 |   edges[u][v] = edges[v][u] = false;
      |   ^~~~~
game.cpp:18:8: error: 'vector' is not a member of 'std'
   18 |   std::vector<bool> visited(n);
      |        ^~~~~~
game.cpp:18:8: note: 'std::vector' is defined in header '<vector>'; did you forget to '#include <vector>'?
game.cpp:18:15: error: expected primary-expression before 'bool'
   18 |   std::vector<bool> visited(n);
      |               ^~~~
game.cpp:20:23: error: 'visited' was not declared in this scope
   20 |   queue.push_back(u), visited[u] = true, ++count;
      |                       ^~~~~~~