Submission #1222454

#TimeUsernameProblemLanguageResultExecution timeMemory
1222454thelegendary08Beech Tree (IOI23_beechtree)C++17
17 / 100
91 ms52036 KiB
#include "beechtree.h" #include<bits/stdc++.h> #define int long long #define f0r(i,n) for(int i = 0; i<n; i++) #define pb push_back #define mp make_pair #define vi vector<int> #define mii map<int,int> #define pii pair<int,int> #define vpii vector<pii> #define FOR(i, k, n) for(int i = k; i<n; i++) #define vb vector<bool> #define vout(v) for(auto u : v)cout<<u<<' '; cout<<endl; using namespace std; vector<vi>adj, colset, su, cha; vi dep, sts, die, diesum, tp; vector<signed>ans; int M; int dfs(int node){ int cur = 1; for(auto u : adj[node]){ dep[u] = dep[node] + 1; cur += dfs(u); } sts[node] = cur; return cur; } int d2(int node){ int cur = die[node]; for(auto u : adj[node]){ cur += d2(u); } diesum[node] = cur; return cur; } void d3(int node){ if(sts[node] == 1){ su[node][tp[node]]++; return; } for(auto u : adj[node]){ d3(u); f0r(j, 4){ su[node][j] += su[u][j]; } } su[node][tp[node]]++; } void d4(int node){ if(sts[node] == 1){ cha[node] = {0}; return; } vector<pair<vi, int>>w; for(auto u : adj[node]){ d4(u); w.pb(mp(cha[u], u)); } sort(w.rbegin(), w.rend()); adj[node].clear(); for(auto u : w){ adj[node].pb(u.second); } queue<int>q; vi seq; q.push(node); seq.pb(adj[node].size()); while(!q.empty()){ int node = q.front(); q.pop(); for(auto u : adj[node]){ q.push(u); seq.pb(adj[u].size()); } } cha[node] = seq; } void solve(int node){ if(sts[node] == 1){ ans[node] = 1; return; } for(auto u : adj[node]){ solve(u); } if(diesum[node] != 0){ ans[node] = 0; return; } //test if including the next for loop preserves correct ans for(auto u : adj[node]){ if(ans[u] == 0){ ans[node] = 0; return; } } /* vi w = su[node]; //vout(w); if(tp[node] == 1 && w[3] != 0){ ans[node] = 0; return; } if(tp[node] == 2 && w[3] != 0){ ans[node] = 0; return; } if(w[1] != 0 && w[2] != 0){ ans[node] = 0; return; } ans[node] = 1; return; */ queue<int>q; vi seq; q.push(node); seq.pb(node); while(!q.empty()){ int node = q.front(); q.pop(); for(auto u : adj[node]){ q.push(u); seq.pb(u); } } set<int>vis; f0r(i, M){ vis.insert(i + 1); } bool ok = 1; f0r(i, seq.size()){ set<int>ne; for(auto u : colset[seq[i]]){ if(!vis.count(u))ok = 0; ne.insert(u); } if(node == 0){ for(auto u : vis)cout<<u<<' '; cout<<'\n'; for(auto u : ne)cout<<u<<' '; cout<<'\n'; cout<<'\n'; } if(!ok)break; vis = ne; } ans[node] = ok; } std::vector<signed> beechtree(signed N, signed M, std::vector<signed> P, std::vector<signed> C) { ::M = M; ans.resize(N); FOR(i, 1, N)ans[i] = 0; colset.clear(); colset.resize(N); adj.clear(); adj.resize(N); tp.clear(); tp.resize(N); dep.clear(); dep.resize(N); sts.clear(); sts.resize(N); die.clear(); die.resize(N); diesum.clear(); diesum.resize(N); cha.resize(N); FOR(i, 1, N){ adj[P[i]].pb(i); } f0r(i, N){ set<int>tmp; for(auto u : adj[i]){ tmp.insert(C[u]); colset[i].pb(C[u]); } if(tmp.size() != colset[i].size()){ die[i] = 1; } int sum = 0; for(auto u : tmp){ sum += u; } tp[i] = sum; } dfs(0); d2(0); if(N <= 8){ f0r(i, N){ vi st; queue<int>q; q.push(i); st.pb(i); while(!q.empty()){ int node = q.front(); q.pop(); for(auto u : adj[node]){ q.push(u); st.pb(u); } } sort(st.begin(), st.end()); bool okk = 0; do{ vi f; f.pb(0); mii m; FOR(j, 1, st.size()){ if(m.count(C[st[j]]))f.pb(m[C[st[j]]]); else f.pb(0); m[C[st[j]]]++; } bool ok = 1; if(st[0] != i)ok = 0; FOR(j,1, st.size()){ if(P[st[j]] != st[f[j]])ok = 0; } if(ok)okk = 1; }while(next_permutation(st.begin(), st.end())); ans[i] = okk; } f0r(i, N){ if(diesum[i] != 0)ans[i] = 0; } return ans; } else{ vb realfather(N); f0r(i, N){ bool ok = 1; for(auto u : adj[i]){ if(sts[u] != 1)ok = 0; } realfather[i] = ok; } f0r(i, N){ int cnt = 0; int sp = 0; for(auto u : adj[i]){ if(sts[u] != 1){ cnt++; sp = u; } } if(cnt == 1){ if(realfather[sp]){ set<int>thing; for(auto u : colset[i])thing.insert(u); bool ok = 1; for(auto u : colset[sp]){ if(!thing.count(u))ok = 0; } ans[i] = ok; } } else if(cnt == 0){ ans[i] = 1; } } f0r(i, N){ if(diesum[i] != 0)ans[i] = 0; } //for adj of each node, sort them by size of colset /* f0r(i,N){ vpii w; for(auto u : adj[i]){ w.pb(mp(colset[u].size(), u)); sort(w.rbegin(), w.rend()); } adj[i].clear(); for(auto u : w){ adj[i].pb(u.second); } } */ /* d4(0); f0r(i, N){ vout(cha[i]); } */ /* su.resize(N); f0r(i, N){ su[i].resize(4); } d3(0); solve(0); */ // solve(0); return ans; } }
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