oj.uz

Submission #753154

# Submission time Handle Problem Language Result Execution time Memory
753154 2023-06-04T16:42:50 Z MISM06 Furniture (JOI20_furniture) C++14
100 / 100
 282 ms 15260 KB 
//0 1 1 0 1
//0 1 0 0 1
//1 0 0 1 1
//0 1 1 0 1
#include <bits/stdc++.h>
#pragma GCC optimize("Ofast,unroll-loops")
#pragma GCC target("avx2")

using namespace std;

#define F 			first
#define S 			second
#define pb 			push_back
#define sze			size()
#define	all(x)		x.begin() , x.end()
#define wall__		cout << "--------------------------------------\n";
#define kids		int mid = (tl + tr) >> 1, cl = v << 1, cr = v << 1 | 1
#define file_io		freopen("input.cpp", "r", stdin); freopen("output.cpp", "w", stdout);

typedef long long ll;
typedef long double dl;
typedef pair < int , int > pii;
typedef pair < int , ll > pil;
typedef pair < ll , int > pli;
typedef pair < ll , ll > pll;
typedef pair < int , pii > piii;
typedef pair < ll, pll > plll;


const ll N = 1e3 + 10;
const ll mod = 1e9 + 7;
const ll inf = 2e16;
const ll rinf = -2e16;
const ll INF = 1e9 + 10;
const ll rINF = -1e9 - 10;
const ll lg = 32;

int n, m;
bitset < N > dp[N], lf[N], rg[N];
bool bl[N][N];

void upd (int x, int y) {
	if (dp[x][y] == 0) return;
	dp[x][y] = 0;
	vector < pii > q; int it = 0; q.pb({x, y});
	while (it < q.sze) {
		int r = q[it].F, c = q[it].S; ++it;
		if (dp[r - 1][c] == 1 && dp[r - 1][c + 1] == 0) {
			dp[r - 1][c] = 0; q.pb({r - 1, c});
		}
		if (dp[r][c - 1] == 1 && dp[r + 1][c - 1] == 0) {
			dp[r][c - 1] = 0; q.pb({r, c - 1});
		}
	}
	q.clear(); it = 0; q.pb({x, y});
	while (it < q.sze) {
		int r = q[it].F, c = q[it].S; ++it;
		if (dp[r + 1][c] == 1 && dp[r + 1][c - 1] == 0) {
			dp[r + 1][c] = 0; q.pb({r + 1, c});
		}
		if (dp[r][c + 1] == 1 && dp[r - 1][c + 1] == 0) {
			dp[r][c + 1] = 0; q.pb({r, c + 1});
		}
	}

} 

void solve () {

	cin >> n >> m;
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++) {
			dp[i][j] = 1;
			cin >> bl[i][j];
		}
	}
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++) {
			if (bl[i][j]) upd(i, j);
		}
	}
	lf[0][0] = 1;
	for (int i = 1; i < N; i++) {
		lf[i] = lf[i - 1]; lf[i][i] = 1;
	}
	rg[N - 1][N - 1] = 1;
	for (int i = N - 2; i >= 0; --i) {
		rg[i] = rg[i + 1]; rg[i][i] = 1;
	}
	int q; cin >> q;
	while(q--) {
		int x, y; cin >> x >> y;
		if (dp[x][y] == 0) {
			cout << 1 << '\n';
			bl[x][y] = 1;
			upd(x, y);
		} else {
			bitset < N > a, b;
			a = (dp[x + 1] & lf[y - 1]); b = (dp[x - 1] & rg[y + 1]);
			int z = a.count() + b.count();
			if (z == 0) cout << 0 << '\n';
			else {
				cout << 1 << '\n';
				bl[x][y] = 1;
				upd(x, y);
			}
		}
	}

}


int main() {
	ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	
	int t = 1;
	// cin >> t;
	while (t--) {solve();}
    return 0;
}
/*
4 4
0 0 0 0
0 0 0 0 
0 0 0 0 
0 0 0 0
4
1 3
2 3
3 2
4 1

*/
//shrek will AC this;

Compilation message

furniture.cpp: In function 'void upd(int, int)':
furniture.cpp:46:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |  while (it < q.sze) {
      |            ^
furniture.cpp:56:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |  while (it < q.sze) {
      |            ^

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 596 KB Output is correct
2 Correct 2 ms 724 KB Output is correct
3 Correct 2 ms 724 KB Output is correct
4 Correct 3 ms 724 KB Output is correct
5 Correct 3 ms 724 KB Output is correct
6 Correct 3 ms 728 KB Output is correct
7 Correct 4 ms 724 KB Output is correct
8 Correct 4 ms 852 KB Output is correct
9 Correct 4 ms 724 KB Output is correct

Subtask #2
95.0 / 95.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 596 KB Output is correct
2 Correct 2 ms 724 KB Output is correct
3 Correct 2 ms 724 KB Output is correct
4 Correct 3 ms 724 KB Output is correct
5 Correct 3 ms 724 KB Output is correct
6 Correct 3 ms 728 KB Output is correct
7 Correct 4 ms 724 KB Output is correct
8 Correct 4 ms 852 KB Output is correct
9 Correct 4 ms 724 KB Output is correct
10 Correct 9 ms 980 KB Output is correct
11 Correct 5 ms 696 KB Output is correct
12 Correct 140 ms 6456 KB Output is correct
13 Correct 66 ms 3568 KB Output is correct
14 Correct 259 ms 11216 KB Output is correct
15 Correct 246 ms 11504 KB Output is correct
16 Correct 247 ms 12208 KB Output is correct
17 Correct 255 ms 12852 KB Output is correct
18 Correct 261 ms 12756 KB Output is correct
19 Correct 275 ms 14004 KB Output is correct
20 Correct 268 ms 15160 KB Output is correct
21 Correct 282 ms 15260 KB Output is correct