Submission #1248651

#TimeUsernameProblemLanguageResultExecution timeMemory
1248651_callmelucianSynchronization (JOI13_synchronization)C++17
Compilation error
0 ms0 KiB
#include <bits/stdc++.h> using namespace std; using ll = long long; using ld = long double; using pl = pair<ll,ll>; using pii = pair<int,int>; using tpl = tuple<int,int,int>; #define all(a) a.begin(), a.end() #define filter(a) a.erase(unique(all(a)), a.end()) const int mn = 1e5 + 5; int chain[mn], sz[mn], par[mn], num[mn], tail[mn], sync[mn], passed[mn], timeDfs; bool stop[mn], toParent[mn], state[2 * mn]; vector<int> adj[mn]; pii edge[mn]; struct BIT { vector<int> tr; BIT (int sz) : tr(sz + 1) {} int p (int k) { return k & -k; } void upd (int k, int val) { for (; k < tr.size(); k += p(k)) tr[k] += val; } void update (int l, int r, int val) { upd(l, val), upd(r + 1, -val); } int get (int k, int ans = 0) { for (; k; k -= p(k)) ans += tr[k]; return ans; } } link(mn); int szDfs (int u, int p) { sz[u] = 1; for (int v : adj[u]) if (v != p) sz[u] += szDfs(v, u); return sz[u]; } void dfs (int u, int p, int d, bool toP) { if (u == 1) szDfs(u, p); num[u] = ++timeDfs, par[u] = p; chain[u] = (toP ? chain[p] : u); if (adj[u].empty()) return; int heavy = *max_element(all(adj[u]), [&] (int a, int b) { return (a == p ? INT_MIN : sz[a]) < (b == p ? INT_MIN : sz[b]); }); if (heavy != p) dfs(heavy, u, d + 1, 1); for (int v : adj[u]) if (v != p && v != heavy) dfs(v, u, d + 1, 0); } int getRoot (int u) { while (!stop[u] || toParent[u]) { if (toParent[u]) u = par[u]; else u = link.get(num[u]); } return u; } void disconnect (int u, int v) { if (chain[u] != chain[v]) toParent[v] = 0; else { int t = link.get(num[u]); link.update(num[v], tail[t], v - t); tail[v] = tail[t], tail[t] = num[u], stop[v] = 1; } } void connect (int u, int v) { if (chain[u] != chain[v]) toParent[v] = 1; else { int t = link.get(num[u]); link.update(num[v], tail[v], t - v); tail[t] = tail[v], stop[v] = 0; } } int main() { ios::sync_with_stdio(0); cin.tie(0); /// read input and run dfs int n, m, q; cin >> n >> m >> q; for (int i = 1; i < n; i++) { int a, b; cin >> a >> b; adj[a].push_back(b); adj[b].push_back(a); edge[i] = {a, b}; } dfs(1, 0, 1, 0); /// pre-process for (int i = 1; i < n; i++) { int a, b; tie(a, b) = edge[i]; if (num[a] > num[b]) edge[i] = {b, a}; } for (int i = 1; i <= n; i++) { sync[i] = stop[i] = 1, tail[i] = num[i]; link.update(num[i], num[i], i); } /// process updates & synchronizations for (int i = 0; i < m; i++) { int d; cin >> d; int a, b; tie(a, b) = edge[d]; if (state[d]) { sync[b] = passed[b] = sync[getRoot(a)]; disconnect(a, b), state[d] = 0; } else { sync[getRoot(a)] += sync[b] - passed[b]; connect(a, b), state[d] = 1; } } /// answer queries for (int i = 0; i < q; i++) { int u; cin >> u; cout << sync[getRoot(u)] << " "; } return 0; }

Compilation message (stderr)

synchronization.cpp:14:59: error: 'int sync [100005]' redeclared as different kind of entity
   14 | int chain[mn], sz[mn], par[mn], num[mn], tail[mn], sync[mn], passed[mn], timeDfs;
      |                                                           ^
In file included from /usr/include/x86_64-linux-gnu/bits/sigstksz.h:24,
                 from /usr/include/signal.h:328,
                 from /usr/include/c++/11/csignal:42,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:43,
                 from synchronization.cpp:1:
/usr/include/unistd.h:1005:13: note: previous declaration 'void sync()'
 1005 | extern void sync (void) __THROW;
      |             ^~~~
synchronization.cpp:35:10: error: 'BIT link' redeclared as different kind of entity
   35 | } link(mn);
      |          ^
In file included from /usr/include/x86_64-linux-gnu/bits/sigstksz.h:24,
                 from /usr/include/signal.h:328,
                 from /usr/include/c++/11/csignal:42,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:43,
                 from synchronization.cpp:1:
/usr/include/unistd.h:819:12: note: previous declaration 'int link(const char*, const char*)'
  819 | extern int link (const char *__from, const char *__to)
      |            ^~~~
synchronization.cpp: In function 'int getRoot(int)':
synchronization.cpp:61:23: error: request for member 'get' in 'link', which is of non-class type 'int(const char*, const char*) noexcept'
   61 |         else u = link.get(num[u]);
      |                       ^~~
synchronization.cpp: In function 'void disconnect(int, int)':
synchronization.cpp:70:22: error: request for member 'get' in 'link', which is of non-class type 'int(const char*, const char*) noexcept'
   70 |         int t = link.get(num[u]);
      |                      ^~~
synchronization.cpp:71:14: error: request for member 'update' in 'link', which is of non-class type 'int(const char*, const char*) noexcept'
   71 |         link.update(num[v], tail[t], v - t);
      |              ^~~~~~
synchronization.cpp: In function 'void connect(int, int)':
synchronization.cpp:79:22: error: request for member 'get' in 'link', which is of non-class type 'int(const char*, const char*) noexcept'
   79 |         int t = link.get(num[u]);
      |                      ^~~
synchronization.cpp:80:14: error: request for member 'update' in 'link', which is of non-class type 'int(const char*, const char*) noexcept'
   80 |         link.update(num[v], tail[v], t - v);
      |              ^~~~~~
synchronization.cpp: In function 'int main()':
synchronization.cpp:106:15: warning: pointer to a function used in arithmetic [-Wpointer-arith]
  106 |         sync[i] = stop[i] = 1, tail[i] = num[i];
      |               ^
synchronization.cpp:106:17: error: assignment of read-only location '*(sync + ((sizetype)i))'
  106 |         sync[i] = stop[i] = 1, tail[i] = num[i];
      |         ~~~~~~~~^~~~~~~~~~~~~
synchronization.cpp:107:14: error: request for member 'update' in 'link', which is of non-class type 'int(const char*, const char*) noexcept'
  107 |         link.update(num[i], num[i], i);
      |              ^~~~~~
synchronization.cpp:115:19: warning: pointer to a function used in arithmetic [-Wpointer-arith]
  115 |             sync[b] = passed[b] = sync[getRoot(a)];
      |                   ^
synchronization.cpp:115:50: warning: pointer to a function used in arithmetic [-Wpointer-arith]
  115 |             sync[b] = passed[b] = sync[getRoot(a)];
      |                                                  ^
synchronization.cpp:115:50: error: invalid conversion from 'void (*)() noexcept' to 'int' [-fpermissive]
  115 |             sync[b] = passed[b] = sync[getRoot(a)];
      |                                   ~~~~~~~~~~~~~~~^
      |                                                  |
      |                                                  void (*)() noexcept
synchronization.cpp:115:21: error: assignment of read-only location '*(sync + ((sizetype)b))'
  115 |             sync[b] = passed[b] = sync[getRoot(a)];
      |             ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
synchronization.cpp:119:28: warning: pointer to a function used in arithmetic [-Wpointer-arith]
  119 |             sync[getRoot(a)] += sync[b] - passed[b];
      |                            ^
synchronization.cpp:119:39: warning: pointer to a function used in arithmetic [-Wpointer-arith]
  119 |             sync[getRoot(a)] += sync[b] - passed[b];
      |                                       ^
synchronization.cpp:119:41: warning: pointer to a function used in arithmetic [-Wpointer-arith]
  119 |             sync[getRoot(a)] += sync[b] - passed[b];
      |                                 ~~~~~~~~^~~~~~~~~~~
synchronization.cpp:119:30: error: invalid operands of types 'void() noexcept' and 'void (*)() noexcept' to binary 'operator+'
  119 |             sync[getRoot(a)] += sync[b] - passed[b];
      |             ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
synchronization.cpp:119:30: note:   in evaluation of 'operator+=(void() noexcept, void (*)() noexcept)'
synchronization.cpp:127:32: warning: pointer to a function used in arithmetic [-Wpointer-arith]
  127 |         cout << sync[getRoot(u)] << " ";
      |                                ^