Submission #962447

#	Time	Username	Problem	Language	Result	Execution time	Memory
962447		Pring	Furniture (JOI20_furniture)	C++17	100 / 100	219 ms	12236 KiB

furniture

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

#ifdef MIKU
string dbmc = "\033[1;38;2;57;197;187m", dbrs = "\033[0m";
#define debug(x...) cout << dbmc << "[" << #x << "]: ", dout(x)
void dout() { cout << dbrs << endl; }
template <typename T, typename ...U>
void dout(T t, U ...u) { cout << t << (sizeof...(u) ? ", " : ""); dout(u...); } 
#else
#define debug(...) 39
#endif

#define fs first
#define sc second
#define mp make_pair
#define FOR(i, j, k) for (int i = j, Z = k; i < Z; i++)
using ll = long long;
typedef pair<int, int> pii;

const int MXN = 1005;
int n, m, q, br;
bitset<MXN> b[MXN];
int cnt[MXN * 2];

void PRE() {
	FOR(i, 0, n + 2) FOR(j, 0, m + 2) if (b[i][j] == 0) cnt[i + j]++;
}

bool PUT(int x, int y) {
	if (b[x][y]) return true;
	if (cnt[x + y] == 1) return false;
	b[x][y] = 1;
	cnt[x + y]--;
	queue<pii> q;
	q.push(mp(x + 1, y));
	q.push(mp(x, y + 1));
	while (q.size()) {
		auto [xx, yy] = q.front();
		q.pop();
		debug(xx, yy, 1);
		if (b[xx][yy] == 1) continue;
		if (!b[xx - 1][yy] || !b[xx][yy - 1]) continue;
		b[xx][yy] = 1;
		cnt[xx + yy]--;
		q.push(mp(xx + 1, yy));
		q.push(mp(xx, yy + 1));
	}
	q.push(mp(x - 1, y));
	q.push(mp(x, y - 1));
	while (q.size()) {
		auto [xx, yy] = q.front();
		q.pop();
		debug(xx, yy);
		if (b[xx][yy] == 1) continue;
		if (!b[xx + 1][yy] || !b[xx][yy + 1]) continue;
		b[xx][yy] = 1;
		cnt[xx + yy]--;
		q.push(mp(xx - 1, yy));
		q.push(mp(xx, yy - 1));
	}
	return true;
}

void miku() {
	cin >> n >> m;
	b[0].set();
	b[n + 1].set();
	FOR(i, 1, n + 1) {
		b[i][0] = true;
		b[i][m + 1] = true;
	}
	PRE();
	FOR(i, 1, n + 1) FOR(j, 1, m + 1) {
		cin >> br;
		if (br) PUT(i, j);
	}
	cin >> q;
	while (q--) {
		int x, y;
		cin >> x >> y;
		debug(x, y);
		cout << PUT(x, y) << '\n';
	}
}

int32_t main() {
	cin.tie(0) -> sync_with_stdio(false);
	cin.exceptions(cin.failbit);
	miku();
	return 0;
}

Compilation message (stderr)

furniture.cpp: In function 'bool PUT(int, int)':
furniture.cpp:11:20: warning: statement has no effect [-Wunused-value]
   11 | #define debug(...) 39
      |                    ^~
furniture.cpp:41:3: note: in expansion of macro 'debug'
   41 |   debug(xx, yy, 1);
      |   ^~~~~
furniture.cpp:11:20: warning: statement has no effect [-Wunused-value]
   11 | #define debug(...) 39
      |                    ^~
furniture.cpp:54:3: note: in expansion of macro 'debug'
   54 |   debug(xx, yy);
      |   ^~~~~
furniture.cpp: In function 'void miku()':
furniture.cpp:11:20: warning: statement has no effect [-Wunused-value]
   11 | #define debug(...) 39
      |                    ^~
furniture.cpp:82:3: note: in expansion of macro 'debug'
   82 |   debug(x, y);
      |   ^~~~~

• Subtask 1: 5 / 5
• Subtask 2: 95 / 95