Submission #941412

#	Time	Username	Problem	Language	Result	Execution time	Memory
941412		tset	Cave (IOI13_cave)	C++14	100 / 100	628 ms	604 KiB

cave

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

vector<int> posLevierOpt, corresp;

bool test(int deb, int fin, int porteAOuvrir, int N)
{
    int tabTest[N];
    for(int i=0; i<N; i++)
    {
        if(posLevierOpt[i]!= -1)
            tabTest[i] = posLevierOpt[i];
        else if(i>= deb && i <= fin)
            tabTest[i] = 1;
        else
            tabTest[i] = 0;
    }
    int firstDoorClosed = tryCombination(tabTest);

    if(firstDoorClosed == -1 || firstDoorClosed > porteAOuvrir)
        return true;
    return false;
}

void exploreCave(int N)
{
    posLevierOpt.assign(N, -1);
    corresp.assign(N, -1);
    for(int iDoor = 0; iDoor< N; iDoor++)
    {
        bool stateDoorInit = test(N, N, iDoor, N);
        int deb = 0;
        int fin = N-1;
        while (deb < fin)
        {
            int mid = (deb + fin)/2;
            int res = test(deb, mid, iDoor, N);
            if(res!=stateDoorInit)
                fin = mid;
            else
                deb = mid +1;
        }
        if(stateDoorInit)
            posLevierOpt[deb] = 0;
        else
            posLevierOpt[deb] = 1;
        corresp[deb] = iDoor;

    }
    int answer1[N], answer2[N];
    for(int i=0; i< N;i++)
        answer1[i] = posLevierOpt[i];
    for(int i=0; i< N;i++)
        answer2[i] = corresp[i];
    answer(answer1, answer2);
}

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