Submission #1313177

#	Time	Username	Problem	Language	Result	Execution time	Memory
1313177		sitingfake	Cave (IOI13_cave)	C++20	0 / 100	83 ms	564 KiB

cave

#include<bits/stdc++.h>
#include "cave.h"
using namespace std;

// define
//bool M1;
//#define execute cerr << " Time: " << fixed << setprecision(6) << (1.0 * clock() / CLOCKS_PER_SEC) << "s\n";
//#define memory cerr << abs(&M2 - &M1)/1024.0/1024 << " MB" << "\n"


#define ll long long
#define ii pair <int , int>
#define iii pair <int , ii>
#define se second
#define fi first
#define all(v) (v).begin() , (v).end()
#define Unique(v) sort(all(v)) , v.resize(unique(all(v)) - v.begin())
#define bit(x,i) (((x) >> (i)) & 1LL)
#define flip(x,i) ((x) ^ (1LL << (i)))
#define ms(d,x) memset(d , x , sizeof(d))
#define exist __exist
#define ends __ends
#define visit visited
#define left __left
#define right __right
#define prev __prev
#define next __next
#define sitingfake 1
#define orz 1

//constant

const long long mod = 1e9 + 7;
const long long linf = 4557430888798830399LL;
const long long nlinf = -4485090715960753727LL;
const int inf = 1061109567;
const int ninf = -1044266559;
const int dx[] = {0 , -1 , 0 , 1};
const int dy[] = {-1 , 0 , 1 , 0};

template<typename T> bool maximize(T &a, const T &b)
{
    if(a < b) {a = b; return 1;}
    return 0;
}

template<typename T> bool minimize(T &a, const T &b)
{
    if(a > b) {a = b; return 1;}
    return 0;
}

void Plus(ll & a ,ll b)
{
    b %= mod;
    a += b;
    if(a < 0) a += mod;
    a %= mod;
    return;
}

void Mul(ll & a, ll b)
{
    (a *= (b % mod)) %= mod;
    return;
}

//code
const int maxn = 5e3 + 7;

void findState(int state[] , int n)
{
    vector <int> p;
    for(int i = 0; i < n; i++)
    {
        state[i] = 1;
        p.push_back(i);
    }
    int cur = tryCombination(state);

    if(cur == -1) return;

    while(!p.empty())
    {
        int left = 0 , right = p.size() - 1 , pos = -1 , val = inf;
        int ask[n];
        for(int i = 0; i < n; i++)
        {
            ask[i] = state[i];
        }
        while(left <= right)
        {
            int mid = (right + left) >> 1;

            for(int i = 0; i <= mid; i++)
            {
                ask[p[i]] = !state[p[i]];
            }

            int d = tryCombination(ask);
            if(d == -1)
            {
                for(int i = 0; i <= mid; i++)
                {
                    state[p[i]] ^= 1;
                }
                return;
            }
            if(d != cur)
            {
                right = mid - 1;
                pos = mid;
                val = d;
            }
            else
            {
                left = mid + 1;
            }
        }
        if(pos == -1) return;

        if(val < cur)
        {
            for(int i = 0; i < pos; i++)
            {
                state[p[i]] ^= 1;
            }
        }
        else
        {
            for(int i = 0; i <= pos; i++)
            {
                state[p[i]] ^= 1;
            }
            cur = val;
        }

        p.erase(p.begin() + pos);
    }
}
void exploreCave(int n)
{
    int state[n] , res[n];
    findState(state , n);
    for(int i = 0; i < n; i++)
    {
        state[i] ^= 1;
        res[i] = tryCombination(state);
        state[i] ^= 1;
    }
    answer(state , res);
}
/**
**/

• Subtask 1: 0 / 12
• Subtask 2: 0 / 13
• Subtask 3: 0 / 21
• Subtask 4: 0 / 30
• Subtask 5: 0 / 24