Submission #318790

#	Time	Username	Problem	Language	Result	Execution time	Memory
318790		Foxyy	Cave (IOI13_cave)	C++14	100 / 100	804 ms	608 KiB

cave

#include "cave.h"

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

const int MAXN = 200000;
const int INF = 0x3f3f3f3f, MOD = 1000000007;
#define INIT(arr, val) fill(arr, arr+(int)(sizeof(arr)/sizeof(arr[0])), val)
#define REP(i, lb, rb, inc) for(int i = (lb); i < (rb); i += inc)
#define RREP(i, rb, lb, dec) for(int i = (rb)-1; i >= (lb); i -= dec)
typedef long long ll;
#define sz size()
typedef stack<int, vector<int> > SI;
typedef queue<int> QI;
typedef vector<int> VI;
#define pb push_back
typedef pair<int, int> PII;
#define mp make_pair
#define F first
#define S second
#define endl '\n'
#define dbg(a, b) cerr << "dbg: a " << b << endl;
#define dbg_itv(a, b, c) cerr << "dbg_itv: " << a << " " << b << " : " << c << endl
#define IOS() cin.tie(0); cout.sync_with_stdio(0)

void exploreCave(int N) {
	int arr[N];
	PII ans[N];
    REP(i, 0, N, 1) {
    	fill(arr, arr+N, 0);
    	REP(j, 0, i, 1) arr[ans[j].F] = ans[j].S;
    	int ret = tryCombination(arr);
   		if (ret > i || ret == -1) ans[i].S = 0;
		else		 ans[i].S = 1;
		int lb, rb;
		lb = 0; rb  = N;
		while(rb - lb - 1 > 0) {
			int mid = (lb+rb)/2;
			fill(arr+lb, arr+mid, ans[i].S); fill(arr+mid, arr+rb, 1-ans[i].S);
    		REP(j, 0, i, 1) arr[ans[j].F] = ans[j].S;
			ret = tryCombination(arr);
			if (ret > i || ret == -1) rb = mid;
			else		 lb = mid;
		}
		ans[i].F = lb;
	}
	int s[N], d[N];
	REP(i, 0, N, 1) {
		d[ans[i].F] = i;
		s[ans[i].F] = ans[i].S;
	}
	answer(s, d);
}

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