Submission #769169

#	Time	Username	Problem	Language	Result	Execution time	Memory
769169		marvinthang	Comparing Plants (IOI20_plants)	C++17	0 / 100	4016 ms	54120 KiB

plants

/*************************************
*    author: marvinthang             *
*    created: 29.06.2023 15:49:29    *
*************************************/

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

using namespace std;

#define                  fi  first
#define                  se  second
#define                left  ___left
#define               right  ___right
#define                TIME  (1.0 * clock() / CLOCKS_PER_SEC)
#define             MASK(i)  (1LL << (i))
#define           BIT(x, i)  ((x) >> (i) & 1)
#define  __builtin_popcount  __builtin_popcountll
#define              ALL(v)  (v).begin(), (v).end()
#define           REP(i, n)  for (int i = 0, _n = (n); i < _n; ++i)
#define          REPD(i, n)  for (int i = (n); i--; )
#define        FOR(i, a, b)  for (int i = (a), _b = (b); i < _b; ++i) 
#define       FORD(i, b, a)  for (int i = (b), _a = (a); --i >= _a; ) 
#define       FORE(i, a, b)  for (int i = (a), _b = (b); i <= _b; ++i) 
#define      FORDE(i, b, a)  for (int i = (b), _a = (a); i >= _a; --i) 
#define        scan_op(...)  istream & operator >> (istream &in, __VA_ARGS__ &u)
#define       print_op(...)  ostream & operator << (ostream &out, const __VA_ARGS__ &u)
#ifdef LOCAL
    #include "debug.h"
#else
    #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
    #define DB(...) 23
    #define db(...) 23
    #define debug(...) 23
#endif

template <class U, class V> scan_op(pair <U, V>)  { return in >> u.first >> u.second; }
template <class T> scan_op(vector <T>)  { for (size_t i = 0; i < u.size(); ++i) in >> u[i]; return in; }
template <class U, class V> print_op(pair <U, V>)  { return out << '(' << u.first << ", " << u.second << ')'; }
template <size_t i, class T> ostream & print_tuple_utils(ostream &out, const T &tup) { if constexpr(i == tuple_size<T>::value) return out << ")";  else return print_tuple_utils<i + 1, T>(out << (i ? ", " : "(") << get<i>(tup), tup); }
template <class ...U> print_op(tuple<U...>) { return print_tuple_utils<0, tuple<U...>>(out, u); }
template <class Con, class = decltype(begin(declval<Con>()))> typename enable_if <!is_same<Con, string>::value, ostream&>::type operator << (ostream &out, const Con &con) { out << '{'; for (__typeof(con.begin()) it = con.begin(); it != con.end(); ++it) out << (it == con.begin() ? "" : ", ") << *it; return out << '}'; }

// end of template

int N;
vector <vector <bool>> visited;

int get_prev(int i, int j) {
	i -= j;
	return i < 0 ? i + N : i;
}

int get_next(int i, int j) {
	i += j;
	return i >= N ? i - N : i;
}

void init(int k, vector <int> r) {
	N = r.size();
	vector <int> h(N);
	--k;
	vector <vector <int>> adj(N);
	REPD(v, N) {
		REP(i, N) if (!r[i]) {
			bool ok = true;
			REP(j, k) if (!r[get_prev(i, j + 1)]) {
				ok = false;
				break;
			}
			if (ok) {
				REP(j, k) --r[get_prev(i, j + 1)];
				r[i] = -1;
				h[i] = v;
				break;
			}
		}
	}
	set <pair <int, int>> left, right;
	REP(i, k) {
		int x = get_prev(0, i + 1);
		left.insert(make_pair(h[x], x));
		x = get_next(0, i + 1);
		right.insert(make_pair(h[x], x));
	}
	REP(i, N) {
		auto it = left.lower_bound(make_pair(h[i], i));
		if (it != left.begin()) adj[i].push_back(prev(it)->se);
		it = right.lower_bound(make_pair(h[i], i));
		if (it != right.begin()) adj[i].push_back(prev(it)->se);
		int x = get_prev(i, k);
		left.erase(make_pair(h[x], x));
		left.insert(make_pair(h[i], i));
		x = get_next(i, k);
		right.erase(make_pair(h[x], x));
		x = get_next(i, k + 1);
		right.insert(make_pair(h[x], x));
	}

	visited.resize(N, vector<bool>(N));
	REP(i, N) {
		queue <int> q;
		q.push(i);
		visited[i][i] = 1;
		while (!q.empty()) {
			int u = q.front(); q.pop();
			for (int v: adj[u]) if (!visited[i][v]) {
				visited[i][v] = 1;
				q.push(v);
			}
		}
	}
}

int compare_plants(int x, int y) {
	if (visited[x][y]) return 1;
	if (visited[y][x]) return -1;
	return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 14
• Subtask 3: 0 / 13
• Subtask 4: 0 / 17
• Subtask 5: 0 / 11
• Subtask 6: 0 / 15
• Subtask 7: 0 / 25