Submission #281762

#	Time	Username	Problem	Language	Result	Execution time	Memory
281762		shayan_p	Cave (IOI13_cave)	C++14	100 / 100	1026 ms	636 KiB

cave

// And you curse yourself for things you never done

#include<bits/stdc++.h>
#include "cave.h"

#define F first
#define S second
#define PB push_back
#define sz(s) int((s).size())
#define bit(n,k) (((n)>>(k))&1)

using namespace std;

typedef long long ll;
typedef pair<int,int> pii;

const int maxn = 5010, mod = 1e9 + 7, inf = 1e9 + 10;

int A[maxn], B[maxn], Tmp[maxn];
    
void exploreCave(int n){
    fill(A, A + n, -1);
    for(int i = 0; i < n; i++){
	for(int j = 0; j < n; j++)
	    Tmp[j] = (A[j] == -1 ? 1 : B[j]);
	bool x = (tryCombination(Tmp) == i);
	int l = 0, r = n;
	while(r-l > 1){
	    int mid = (l+r) >> 1;
	    for(int j = 0; j < n; j++)
		Tmp[j] = (A[j] == -1 ? (x ^ (j >= mid)) : B[j]);
	    if(tryCombination(Tmp) == i)
		r = mid;
	    else
		l = mid;
	}
	A[l] = i, B[l] = !x;
    }
    answer(B, A);
}

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