Submission #1037878

#TimeUsernameProblemLanguageResultExecution timeMemory
1037878_8_8_Game (APIO22_game)C++17
2 / 100
21 ms127252 KiB
#include "game.h" #include <bits/stdc++.h> using namespace std; const int N = 3e5 + 12; vector<int> g[N],gr[N]; set<int> L[N * 4],R[N * 4]; int k; void build(int v = 1,int tl = 0,int tr = k - 1) { int tm = (tl + tr) >> 1; for(int i = tl;i <= tr;i++) { if(i <= tm) { L[v].insert(i); } if(i >= tm) { R[v].insert(i); } } if(tl == tr) return; build(v + v,tl,tm); build(v + v + 1,tm + 1,tr); } void init(int n, int K) { k = K; for(int i = 0;i <= k - 2;i++) { g[i].push_back(i + 1); gr[i + 1].push_back(i); } build(); } bool CYC = false; void add(int x,int y,int v = 1,int tl = 0,int tr = k - 1) { int tm = (tl + tr) >> 1; function<void(int)> dfs = [&](int u){ // cout << tm << ' ' << u << "R\n"; R[v].insert(u); if(L[v].find(u) != L[v].end()) { CYC = 1; return; } for(int to:g[u]) { if(R[v].find(to) == R[v].end()) { dfs(to); } if(CYC) return; } if(CYC) return; }; function<void(int)> dfs1 = [&](int u){ // cout << tm << ' ' << u << "L\n"; if(R[v].find(u) != R[v].end()) { CYC = 1; return; } L[v].insert(u); for(int to:gr[u]) { if(L[v].find(to) == L[v].end()) { dfs1(to); } if(CYC) return; } if(CYC) return; }; // cout << tm << ' ' << x << ' ' << y << "A\n"; if(R[v].find(x) != R[v].end() && R[v].find(y) == R[v].end()) { dfs(y); if(CYC) return; if(tl != tr) { add(x,y,v+v+1,tm+1,tr); } } if(L[v].find(y) != L[v].end() && L[v].find(x) == L[v].end()) { dfs1(x); if(CYC) return; if(tl != tr) { add(x,y,v+v,tl,tm); } } } int add_teleporter(int u, int v) { if(CYC) return 1; if(max(u,v) <= k - 1) { if(u >= v) { CYC = 1; return 1; } return 0; } // cout << u << ' ' << v << '\n'; g[u].push_back(v); gr[v].push_back(u); add(u,v); return CYC; }
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