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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. vector<bool> safe;
  6. int S;
  7. set<pair<int, int>> vis;
  8. void dfs(int cur, int speed) {
  9.     if (vis.count(pair<int, int>(cur, speed)) != 0)
  10.         return;
  11.     if (cur > safe.size())
  12.         return;
  13.     vis.insert(pair<int, int>(cur, speed));
  14.     vector<int> newSpeeds = {max(speed - 1, 1), speed, speed + 1};
  15.     for (auto s : newSpeeds) {
  16.         if (cur + s < safe.size() && safe[cur + s])
  17.             dfs(cur + s, s);
  18.     }
  19.     return;
  20. }
  21.  
  22. int main() {
  23.     safe = {true, false, true, true, true, false, true, true, false, true, true};
  24.     S = 4;
  25.     dfs(0, S);
  26.     vector<bool> reachable(safe.size());
  27.     for (auto i : vis) {
  28.         reachable[i.first] = true;
  29.     }
  30.     for (auto i : reachable) {
  31.         cout << i << ' ';
  32.     }
  33.     cout << endl;
  34. }
Success #stdin #stdout 0s 4356KB
comments (?)
stdin 
Standard input is empty
stdout 
1 0 0 1 1 0 1 1 0 1 1
https://ideone.com/rU5COm
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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