Submission #1038682

#	Time	Username	Problem	Language	Result	Execution time	Memory
1038682		_8_8_	Game (APIO22_game)	C++17	12 / 100	133 ms	191056 KiB

game

#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 * 3],R[N * 3];
int k;
int nn;
void build(int v = 1,int tl = 0,int tr = k - 1) {
    if(tl > tr) return;
    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 - 1);
    build(v + v + 1,tm + 1,tr);
}
void init(int n, int K) {
    k = K;
    nn = n;
    for(int i = 0;i <= k - 2;i++) {
        g[i].push_back(i + 1);
        gr[i + 1].push_back(i); 
    }
    build();
}
bool CYC = false;
vector<int>_r[N];
bool check(int tm,int prev,int v,int val) {
    if(prev == -1) return 1;
    if(prev < tm && R[v / 2].find(val) == R[v / 2].end()) return false;
    if(prev > tm && L[v / 2].find(val) == L[v / 2].end()) return false;
    return 1;
}
set<int> bfl[N * 3],bfr[N * 3];
void add(int x,int y,int &v,int &tl,int &tr,int &prev) {
    if(tl > tr) return;
    if(CYC) return;
    int tm = (tl + tr) >> 1;
    function<void(int)> dfs = [&](int u){
        R[v].insert(u);
        _r[u].push_back(tm);
        // cout << tm << ' ' << u << "R\n";
        if(L[v].find(u) != L[v].end()) {
            CYC = 1;
            return;
        }
        for(int to:g[u]) {
            if(R[v].find(to) == R[v].end() && check(tm,prev,v,to)) {
                dfs(to);
            }
            if(CYC) return;
        }
        if(CYC) return;
    };
    if(R[v].find(x) != R[v].end()) bfr[v].insert(y);
    auto it = bfr[v].begin();
    bool ok = false;
    while(it != bfr[v].end()) {
        if(R[v].find(*it) != R[v].end()){
            it = bfr[v].erase(it);
            ok  = 1;
            continue;
        }
        if(R[v].find(*it) == R[v].end() && check(tm,prev,v,*it)) {
            dfs(*it);
            ok = 1;
            it = bfr[v].erase(it);
        }else {
            it++;
        }
    }
    if(ok) {
        v = v + v + 1;
        tl = tm + 1;
        prev = tm;
    } else {
        v += v;
        tr = tm - 1;
        prev = tm;
    }
}
void addl(int x,int y,int &v,int &tl,int &tr,int &prev) {
    if(tl > tr) return;
    if(CYC) return;
    int tm = (tl + tr) >> 1;
    function<void(int)> dfs1 = [&](int u){
        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() && (check(tm,prev,v,to))) {
                dfs1(to);
            }
            if(CYC) return;
        }
        if(CYC) return;
    };
    bool ok = false;
    if(L[v].find(y) != L[v].end()) {
        bfl[v].insert(x);
    }
    auto it = bfl[v].begin();
    while(it != bfl[v].end()) {
        if(L[v].find(*it)!=L[v].end()){
            it = bfl[v].erase(it);
            ok = 1;
            continue;
        }
        if(check(tm,prev,v,*it)) {
            dfs1(*it);
            it = bfl[v].erase(it);
            ok = 1;
        }else {
            it++;
        }
    }
    if(ok) {
        v += v;
        tr = tm - 1;
        prev = tm;
    } else {
        v = v + v + 1;
        tl = tm + 1;
        prev = tm;
    }
}
void _add(int u,int v) {
    int v1 = 1,tl1 = 0,tr1 = k - 1,prev1 = -1;
    int v2 = 1,tl2 = 0,tr2 = k - 1,prev2 = -1;
    while(tl1 <= tr1 || tl2 <= tr2) {
        add(u,v,v2,tl2,tr2,prev2);
        addl(u,v,v1,tl1,tr1,prev1);
        if(CYC) break;
    }
}
int add_teleporter(int u, int v) {
    if(max(u,v) <= k - 1) {
        if(u >= v) {
            CYC = 1;
            return 1;
        }
        return 0;
    }
    if(CYC) return 1;
    g[u].push_back(v);
    gr[v].push_back(u);
    _add(u,v);
    // cout << "_____________\n";
    return CYC;
}  

• Subtask 1: 2 / 2
• Subtask 2: 10 / 10
• Subtask 3: 0 / 18
• Subtask 4: 0 / 30
• Subtask 5: 0 / 40