#include "longesttrip.h" #include <bits/stdc++.h> using namespace std; #define pb push_back #define mp make_pair #define pii pair<int, int> #define fi first #define se second vector<int> longest_trip(int n, int d){ if (d==3){ vector<int> ans; for (int i=0; i<n; ++i)ans.pb(i); return ans; } if (d==2){ deque<int> ans(1, 0); int done=1; if (are_connected({0}, {1}))ans.pb(1); else ans.pb(2), done=2; for (int i=1; i<n; ++i)if (i!=done){ if (are_connected({i}, {ans.back()}))ans.pb(i); else ans.push_front(i); } vector<int> res; for (auto a:ans)res.pb(a); return res; } int res=1; deque<int> ans(1, 0); set<int> s; for (int i=1; i<n; ++i)s.insert(i); int loop=100; while (loop--){ vector<int> temp; for (int i:s){ if (are_connected({i}, {ans.back()}))ans.pb(i), temp.pb(i); else if (are_connected({i}, {ans[0]}))ans.push_front(i), temp.pb(i); } for (auto a:temp)s.erase(a); } vector<int> res; for (auto a:ans)res.pb(a); return res; }

longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:43:21: error: conflicting declaration 'std::vector<int> res'
   43 |         vector<int> res;
      |                     ^~~
longesttrip.cpp:30:13: note: previous declaration as 'int res'
   30 |         int res=1;
      |             ^~~
longesttrip.cpp:5:12: error: request for member 'push_back' in 'res', which is of non-class type 'int'
    5 | #define pb push_back
      |            ^~~~~~~~~
longesttrip.cpp:44:29: note: in expansion of macro 'pb'
   44 |         for (auto a:ans)res.pb(a);
      |                             ^~
longesttrip.cpp:45:16: error: could not convert 'res' from 'int' to 'std::vector<int>'
   45 |         return res;
      |                ^~~
      |                |
      |                int