Submission #877204

#TimeUsernameProblemLanguageResultExecution timeMemory
877204KutanRigged Roads (NOI19_riggedroads)C++17
68 / 100
267 ms59496 KiB
// Cao Quang Hung #include <cassert> #include <cctype> #include <cerrno> #include <cfloat> #include <ciso646> #include <climits> #include <clocale> #include <cmath> #include <csetjmp> #include <csignal> #include <cstdarg> #include <cstddef> #include <cstdio> #include <cstdlib> #include <cstring> #include <ctime> #include <ccomplex> #include <cfenv> #include <cinttypes> #include <cstdbool> #include <cstdint> #include <ctgmath> #include <cwchar> #include <cwctype> #include <algorithm> #include <bitset> #include <complex> #include <deque> #include <exception> #include <fstream> #include <functional> #include <iomanip> #include <ios> #include <iosfwd> #include <iostream> #include <istream> #include <iterator> #include <limits> #include <list> #include <locale> #include <map> #include <memory> #include <new> #include <numeric> #include <ostream> #include <queue> #include <set> #include <sstream> #include <stack> #include <stdexcept> #include <streambuf> #include <string> #include <typeinfo> #include <utility> #include <valarray> #include <vector> #include <array> #include <atomic> #include <chrono> #include <condition_variable> #include <forward_list> #include <future> #include <initializer_list> #include <mutex> #include <random> #include <ratio> #include <regex> #include <scoped_allocator> #include <system_error> #include <thread> #include <tuple> #include <typeindex> #include <type_traits> #include <unordered_map> #include <unordered_set> using namespace std; #define pb push_back #define eb emplace_back #define mp make_pair #define pii pair<int,int> #define pll pair<long long , long long> #define vi vector<int> #define vpii vector<pii> #define SZ(x) ((int)(x.size())) #define fi first #define se second #define IN(x,y) ((y).find((x))!=(y).end()) #define ALL(t) t.begin(),t.end() #define FOREACH(i,t) for (typeof(t.begin()) i=t.begin(); i!=t.end(); i++) #define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i) #define REPD(i,a,b) for(int (i)=(a); (i)>=(b);--i) #define FOR(i, n) for (int (i) = 0; (i) < (n); ++(i)) #define dem(x) __builtin_popcount(x) #define Mask(x) (1LL << (x)) #define BIT(x, i) ((x) >> (i) & 1) #define ln '\n' #define io_faster ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0); ///mt19937 rnd(time(0)); const int INF = 1e9 , mod = 1e9 + 7; template <class T1, class T2> inline T1 mul(T1& x, const T2 &k){ return x = (1LL * x * k) % mod; } template <class T1 , class T2> inline T1 pw(T1 x, T2 k){T1 res = 1; for (; k ; k >>= 1){ if (k & 1) mul(res, x); mul(x, x); } return res;} template <class T> inline bool minimize(T &x, const T &y){ if (x > y){x = y; return 1;} return 0; } template <class T> inline bool maximize(T &x, const T &y){ if (x < y){x = y; return 1;} return 0; } template <class T> inline void add(T &x , const T &y){ if ((x += y) >= mod) x -= mod; } template <class T> inline T product (const T &x , const T &y) { return 1LL * x * y % mod; } #define PROB "a" void file(){ if(fopen(PROB".inp", "r")){ freopen(PROB".inp","r",stdin); freopen(PROB".out","w",stdout); } } void sinh_(){ // srand(time(0)); // freopen(PROB".inp" , "w" , stdout); // int n; } typedef long long ll; typedef double db; const int N = 3e5 + 5; int n, m, mst[N]; int depth[N], idx[N], par[N]; int deg[N], ans[N]; int sz[N], mx[N], idHld[N]; int base[N], depthHld[N], head[N]; bool on_mst[N], vis[N]; pii edge[N]; vi adj[N], g[N]; int other(int x, int id) { return x ^ edge[id].first ^ edge[id].second; } void readip(){ cin >> n >> m; REP(i, 1, m) cin >> edge[i].fi >> edge[i].se; REP(i, 1, n - 1) { cin >> mst[i]; on_mst[mst[i]] = true; int u = edge[mst[i]].first; int v = edge[mst[i]].second; adj[u].eb(mst[i]); adj[v].eb(mst[i]); } } void dfs_mst(int u, int p) { sz[u] = 1; mx[u] = -1; for (int &id : adj[u]) { int v = other(u, id); if (v == p) continue; par[v] = u; depth[v] = depth[u] + 1; idx[v] = id; dfs_mst(v, u); sz[u] += sz[v]; if (mx[u] == -1 || sz[mx[u]] < sz[v]) mx[u] = v; } } namespace sub12356{ bool check() { if (n == m) return true; if (n <= 1000 && m <= 1000) return true; REP(i, 1, n - 1) { int u = edge[mst[i]].first; int v = edge[mst[i]].second; if (u == 1 || v == 1) continue; return false; } return true; } void prepare() { REP(i, 1, m) if (!on_mst[i]) { int u = edge[i].first; int v = edge[i].second; if (depth[u] > depth[v]) swap(u, v); while(depth[v] > depth[u]) { int ID = idx[v]; g[i].eb(ID); ++deg[i]; v = par[v]; } while(u != v) { int ID = idx[u]; g[i].eb(ID); ++deg[i]; ID = idx[v]; g[i].eb(ID); ++deg[i]; u = par[u]; v = par[v]; } } } void solve() { prepare(); int cnt = 0; REP(i, 1, m) if (!vis[i]) { vector<int> v; for (int x : g[i]) if (!vis[x]) v.eb(x); sort(ALL(v)); for (int u : v) { vis[u] = true; ans[u] = ++cnt; } vis[i] = true; ans[i] = ++cnt; } REP(i, 1, m) cout << ans[i] << ' '; } }; namespace sub_full { set<int> s; int timeHld = 0; int cnt = 0; void hld(int u, int p) { idHld[u] = ++timeHld; base[timeHld] = u; if (mx[u] == -1) return; depthHld[mx[u]] = depthHld[u]; head[mx[u]] = head[u]; hld(mx[u], u); for (int &id : adj[u]) { int v = other(u, id); if (v == mx[u] || v == p) continue; depthHld[v] = depthHld[u] + 1; head[v] = v; hld(v, u); } } vector<int> curEdge; void path(int u, int v) { while(head[u] != head[v]) { if (depthHld[u] > depthHld[v]) swap(u, v); int l = idHld[head[v]], r = idHld[v]; if (s.empty()) return; auto it = s.lower_bound(l); while(it != s.end() && *it <= r) { int pos = *it; int hihi = idx[base[pos]]; curEdge.eb(hihi); it = s.erase(it); } v = par[head[v]]; } if (idHld[u] > idHld[v]) swap(u, v); int l = idHld[u] + 1, r = idHld[v]; if (s.empty()) return; auto it = s.lower_bound(l); while(it != s.end() && *it <= r) { int pos = *it; int hihi = idx[base[pos]]; if (!vis[hihi]) curEdge.eb(hihi); it = s.erase(it); } } void solve() { head[1] = 1; depthHld[1] = 1; REP(i, 2, n) s.insert(i); hld(1, -1); REP(i, 1, m) if (!vis[i]) { if (on_mst[i]) { vis[i] = true; ans[i] = ++cnt; continue; } int u = edge[i].fi, v = edge[i].se; curEdge.clear(); path(u, v); sort(ALL(curEdge)); for (int x : curEdge) { vis[x] = true; ans[x] = ++cnt; } vis[i] = true; ans[i] = ++cnt; } REP(i, 1, m) cout << ans[i] << ' '; } }; void solve(){ dfs_mst(1, -1); if (sub12356::check()) { sub12356::solve(); return; } sub_full::solve(); } int main(){ sinh_(); io_faster file(); int t = 1; // cin >> t; while (t--){ readip(); solve(); } }

Compilation message (stderr)

riggedroads.cpp: In function 'void readip()':
riggedroads.cpp:92:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   92 | #define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
      |                            ^
riggedroads.cpp:156:5: note: in expansion of macro 'REP'
  156 |     REP(i, 1, m) cin >> edge[i].fi >> edge[i].se;
      |     ^~~
riggedroads.cpp:92:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   92 | #define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
      |                            ^
riggedroads.cpp:157:5: note: in expansion of macro 'REP'
  157 |     REP(i, 1, n - 1) {
      |     ^~~
riggedroads.cpp: In function 'bool sub12356::check()':
riggedroads.cpp:92:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   92 | #define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
      |                            ^
riggedroads.cpp:190:9: note: in expansion of macro 'REP'
  190 |         REP(i, 1, n - 1) {
      |         ^~~
riggedroads.cpp: In function 'void sub12356::prepare()':
riggedroads.cpp:92:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   92 | #define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
      |                            ^
riggedroads.cpp:201:9: note: in expansion of macro 'REP'
  201 |         REP(i, 1, m) if (!on_mst[i]) {
      |         ^~~
riggedroads.cpp: In function 'void sub12356::solve()':
riggedroads.cpp:92:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   92 | #define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
      |                            ^
riggedroads.cpp:231:9: note: in expansion of macro 'REP'
  231 |         REP(i, 1, m) if (!vis[i]) {
      |         ^~~
riggedroads.cpp:92:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   92 | #define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
      |                            ^
riggedroads.cpp:243:9: note: in expansion of macro 'REP'
  243 |         REP(i, 1, m) cout << ans[i] << ' ';
      |         ^~~
riggedroads.cpp: In function 'void sub_full::solve()':
riggedroads.cpp:92:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   92 | #define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
      |                            ^
riggedroads.cpp:300:9: note: in expansion of macro 'REP'
  300 |         REP(i, 2, n) s.insert(i);
      |         ^~~
riggedroads.cpp:92:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   92 | #define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
      |                            ^
riggedroads.cpp:302:9: note: in expansion of macro 'REP'
  302 |         REP(i, 1, m) if (!vis[i]) {
      |         ^~~
riggedroads.cpp:92:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   92 | #define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
      |                            ^
riggedroads.cpp:320:9: note: in expansion of macro 'REP'
  320 |         REP(i, 1, m) cout << ans[i] << ' ';
      |         ^~~
riggedroads.cpp: In function 'void file()':
riggedroads.cpp:125:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  125 |         freopen(PROB".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
riggedroads.cpp:126:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  126 |         freopen(PROB".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
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