Submission #441136

#	Time	Username	Problem	Language	Result	Execution time	Memory
441136		lLab_	Cave (IOI13_cave)	C++14	13 / 100	39 ms	65540 KiB

cave

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

int n;
int sol(int A[], int s, int e, int tar){
    if(s>e) return -1;
    int B[n];
    int mid = (s+e)/2;
    for(int i=0;i<n;++i){
        B[i] = A[i];
    }
    for(int i=mid;i<e;++i){
        B[i] = (B[i]+1)%2;
    }
    int res = tryCombination(B);
    if(s==e){
        if(res > tar || res == -1){
            return s;
        }else{
            return -1;
        }
    }
    if(res > tar || res == -1){
        return sol(A, mid, e, tar);
    }else{
        return max(sol(A, mid, e, tar),sol(A, s, mid-1, tar));
    }
}

void exploreCave(int N) {
    n = N;
    int B[N];
    for(int i=0;i<N;++i){
        B[i] = 0;
    }
    int res = 0;
    while(res != -1){
        res = tryCombination(B);
        if(res == -1) break;
        int p = sol(B,0,N-1,res);
        B[p] = (B[p]+1)%2;
    }
    int door[N];
    for(int i=0;i<N;++i){
        B[i] = (B[i]+1)%2;
        door[i] = tryCombination(B);
        B[i] = (B[i]+1)%2;
    }
    answer(B,door);
}

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