Submission #726922

#	Time	Username	Problem	Language	Result	Execution time	Memory
726922		Vu_CG_Coder	Game (APIO22_game)	C++17	2 / 100	9 ms	14412 KiB

game

/* [Author : Hoang Duy Vu] - THPT Chuyen Nguyen Du    */
//#pragma GCC optimize(" unroll-loops")
//#pragma gcc optimize("Ofast")
//#pragma GCC optimization("Ofast")
//#pragma optimize(Ofast)
#include "game.h"
#include <bits/stdc++.h>
#define All(x) (x).begin(),(x).end()
#define ll long long
#define C make_pair
#define fi first
#define se second
#define two second.first
#define thr second.second
#define TASK "txt"
using namespace std;
template<typename T> bool maximize(T &res, const T &val) {
    if (res < val) { res = val; return true; } return false; }
template<typename T> bool minimize(T &res, const T &val) {
    if (res > val) { res = val; return true; } return false; }

typedef pair<int,int> ii;
typedef pair<int,ii> iii;
const int LOG = 20;
const int INF = 1e9 + 7;
const ll LNF = 1e18 + 7;
const int mod = 1e9 + 7;
const int Nx = 3e5 + 100;

int val[2][Nx];
vector <int> a[2][Nx];
int n , k;
int ok;

void init(int _n , int _k)
{
    n = _n;
    k = _k;

    for (int i = 0 ; i < k ; i++) 
    {
        val[0][i] = i;
        val[1][i] = i - 1;
    }

    for (int i = k ; i <= n ; i++)
    {
        val[0][i] = INF;
        val[1][i] = -INF;
    }
}

void dfs(int id , int u, int gt)
{
    int old = val[id][u];
    if (id) maximize(val[id][u],gt);
    else minimize(val[id][u],gt);

    if (val[1][u] >= val[0][u]) {
        ok = 1;
        return ;
    }

    if (old == val[id][u]) return ;

    if (val[1][u] < 0) return ;

    int x = old^val[id^1][u];
    int y = val[id][u]^val[id^1][u];

    for (int i = 20 ; i >= 0 ; i--) if (x&(1<<i)) 
    {
        x = i;
        break;
    }

    for (int i = 20 ; i >= 0 ; i--) if (y&(1<<i)) 
    {
        y = i;
        break;
    }

    if (x < y)
    {
        for (int tt = 0 ; tt < 2 ; tt++)
            for (int v : a[tt][u])
                dfs(tt,v,val[tt][u]);
    }
}

int add_teleporter(int u, int v)
{
    if (u > v && u < k) return 1;

    a[1][u].push_back(v);
    a[0][v].push_back(u);

    ok = 0;

    int gt = val[1][u];
    if (u < k) gt = u;
    dfs(1,v,gt);

    gt = val[0][v];
    if (v < k) gt = v;
    dfs(0,u,gt);

    if (ok == 1) return 1;
    return 0;
}


// int main()
// {
//     if(fopen(TASK".inp", "r")){
//     freopen(TASK".inp","r",stdin);
//     freopen(TASK".out","w",stdout);
//     }

//     int x , y , z;
//     cin >> x >> y >> z;

//     init(x,y);

//     for (int i = 1 ; i <= z ; i++)
//     {
//         int a , b;
//         cin >> a >> b;
//         if (add_teleporter(a,b)) 
//         {
//             (cout << i);
//             return 0;
//         }
//     } 
//     return 0;
// }

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