Submission #655131

#	Time	Username	Problem	Language	Result	Execution time	Memory
655131		sandry24	Cave (IOI13_cave)	C++17	100 / 100	213 ms	464 KiB

cave

#include <bits/stdc++.h>
#include "cave.h"
using namespace std;
 
typedef long long ll;
typedef vector<int> vi;
typedef pair<int, int> pi;
#define pb push_back
#define mp make_pair
#define f first
#define s second 
 
void exploreCave(int N){
    int s[N], d[N];
    memset(s, 0, sizeof(s));
    vector<bool> checked(N);
    for(int i = 0; i < N; i++){
        int l = 0, r = N-1;
        int f_ans = tryCombination(s);
        while(l != r){
            int temp[N];
            for(int j = 0; j < N; j++)
                temp[j] = s[j];
            int mid = (l+r)/2;
            for(int j = l; j <= mid; j++){
                if(checked[j])
                    continue;
                temp[j] = !s[j];
            }
            int ans = tryCombination(temp);
            if((f_ans == i && ans != i) || (f_ans != i && ans == i))
                r = mid;
            else
                l = mid+1;
        }
        d[l] = i;
        checked[l] = 1;
        if(f_ans == i)
            s[l] = !s[l];
    }
    answer(s, d);
}

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