Submission #1284763

#	Time	Username	Problem	Language	Result	Execution time	Memory
1284763		blackscreen1	Cave (IOI13_cave)	C++20	100 / 100	199 ms	652 KiB

cave

#include "cave.h"
#include <bits//stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
typedef tree<long long, null_type, less<long long>, rb_tree_tag,
             tree_order_statistics_node_update>
    ordered_set;
typedef tree<long long, null_type, less_equal<long long>, rb_tree_tag,
             tree_order_statistics_node_update>
    ordered_multiset;
#define ll long long
#define ld long double
#define iloop(m, h) for (ll i = m; i != h; i += (m < h ? 1 : -1))
#define jloop(m, h) for (auto j = m; j != h; j += (m < h ? 1 : -1))
#define kloop(m, h) for (auto k = m; k != h; k += (m < h ? 1 : -1))
#define lloop(m, h) for (auto l = m; l != h; l += (m < h ? 1 : -1))
#define iloop_(m, h, g) for (auto i = m; i != h; i += g)
#define jloop_(m, h, g) for (auto j = m; j != h; j += g)
#define kloop_(m, h, g) for (auto k = m; k != h; k += g)
#define lloop_(m, h, g) for (auto l = m; l != h; l += g)
#define getchar_unlocked _getchar_nolock // comment before submission
#define pll pair<ll, ll>
#define plll pair<ll, pll>
#define pllll pair<pll, pll>
#define vll vector<ll>
#define qll queue<ll>
#define dll deque<ll>
#define pqll priority_queue<ll>
#define gll greater<ll>
#define INF 1000000000000000
#define MOD1 1000000007
#define MOD2 998244353
#define MOD3 1000000009
mt19937 rng(chrono::system_clock::now().time_since_epoch().count());
void exploreCave(int N) {
	int a[N];
	int det[N];
	int ans[N], ans2[N];
	memset(det, -1, sizeof(det));
    iloop(0, N) {
		bool main = 0;
		memset(a, 0, sizeof(a));
		jloop(0, N) if (det[j] != -1) {a[j] = det[j];}
		//cout << "Test: ";
		//jloop(0, N) cout << a[j] << " ";
		//cout << "\n";
		if (tryCombination(a) == i) main = 1;
		jloop(0, N) if (det[j] == -1) a[j] = main;
		if (i == N-1) {
			jloop(0, N) if (det[j] == -1) {ans[j] = main, ans2[j] = i;}
			break;
		}
		vector<ll> val;
		jloop(0, N) if (det[j] == -1) val.push_back(j);
		ll lb = 0, ub = N-i-1, mid;
		while (lb < ub) {
			mid = (lb + ub)>>1;
			jloop(mid+1, ub+1) a[val[j]] = main^1;
			//cout << "Test: ";
			//jloop(0, N) cout << a[j] << " ";
			//cout << "\n";
			ll tmp = tryCombination(a);
			//cout << tmp << "res\n";
			if (tmp > i || tmp == -1) {
				ub = mid;
			}
			else {
				jloop(mid+1, ub+1) a[val[j]] = main;
				lb = mid + 1;
			}
		}
		det[val[lb]] = main;
		ans[val[lb]] = main;
		ans2[val[lb]] = i;
		//cout << lb << " " << val[lb] << "g\n";
	}
	answer(ans, ans2);
}

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