//#pragma GCC optimize("Ofast")
//#pragma GCC target("avx,avx2,sse,sse2,sse3,ssse3,sse4,abm,popcnt,mmx")
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef double db;
typedef long double ldb;
typedef complex<double> cd;
constexpr ll INF64 = 9'000'000'000'000'000'000, INF32 = 2'000'000'000, MOD = 1'000'000'007;
constexpr db PI = acos(-1);
constexpr bool IS_FILE = false, IS_TEST_CASES = false;
random_device rd;
mt19937 rnd32(rd());
mt19937_64 rnd64(rd());
template<typename T>
bool assign_max(T& a, T b) {
if (b > a) {
a = b;
return true;
}
return false;
}
template<typename T>
bool assign_min(T& a, T b) {
if (b < a) {
a = b;
return true;
}
return false;
}
template<typename T>
T square(T a) {
return a * a;
}
template<>
struct std::hash<pair<ll, ll>> {
ll operator() (pair<ll, ll> p) const {
return ((__int128)p.first * MOD + p.second) % INF64;
}
};
void check(ll a, ll b, vector<vector<ll>>& arr, vector<ll>& col, bool d = true) {
if (arr[a][b] && d) {
return;
}
if ((a == 0 && b == 0) || (a == arr.size() - 1 && b == arr[0].size() - 1)) {
return;
}
if (arr[a][b] || ((a == 0 || arr[a - 1][b]) && (b == 0 || arr[a][b - 1])) || ((a == arr.size() - 1 || arr[a + 1][b]) && (b == arr[0].size() - 1 || arr[a][b + 1]))) {
if (arr[a][b] == 0) {
col[a]--;
}
arr[a][b] = 1;
if (a != 0) {
check(a - 1, b, arr, col);
}
if (b != 0) {
check(a, b - 1, arr, col);
}
if (a != arr.size() - 1) {
check(a + 1, b, arr, col);
}
if (b != arr[0].size() - 1) {
check(a, b + 1, arr, col);
}
}
}
void solve() {
ll n, m;
cin >> n >> m;
vector<vector<ll>> arr(n, vector<ll>(m));
vector<ll> col(n, 0);
for (ll i = 0; i < n; i++) {
for (ll j = 0; j < m; j++) {
cin >> arr[i][j];
col[i] += arr[i][j] == 0;
}
}
for (ll i = 0; i < n; i++) {
for (ll j = 0; j < m; j++) {
check(i, j, arr, col);
}
}
ll q;
cin >> q;
for (ll i = 0; i < q; i++) {
ll x, y;
cin >> x >> y;
x--;
y--;
ll c = 1;
if (arr[x][y] == 1) {
cout << 1 << '\n';
continue;
}
ll ny = y - 1;
while (ny >= 0) {
if (arr[x][ny] || (x != n - 1 && arr[x + 1][ny] == 0)) {
break;
}
c++;
ny--;
}
ny = y + 1;
while (ny < m) {
if (arr[x][ny] || (x != 0 && arr[x - 1][ny] == 0)) {
break;
}
c++;
ny++;
}
if (c >= col[x]) {
cout << 0 << '\n';
continue;
}
cout << 1 << '\n';
arr[x][y] = 1;
col[x]--;
check(x, y, arr, col, false);
}
}
int main() {
if (IS_FILE) {
freopen("", "r", stdin);
freopen("", "w", stdout);
}
ios_base::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
ll t = 1;
if (IS_TEST_CASES) {
cin >> t;
}
for (ll i = 0; i < t; i++) {
solve();
}
}
Compilation message
furniture.cpp: In function 'void check(ll, ll, std::vector<std::vector<long long int> >&, std::vector<long long int>&, bool)':
furniture.cpp:54:38: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<std::vector<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
54 | if ((a == 0 && b == 0) || (a == arr.size() - 1 && b == arr[0].size() - 1)) {
| ~~^~~~~~~~~~~~~~~~~
furniture.cpp:54:61: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
54 | if ((a == 0 && b == 0) || (a == arr.size() - 1 && b == arr[0].size() - 1)) {
| ~~^~~~~~~~~~~~~~~~~~~~
furniture.cpp:57:90: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<std::vector<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
57 | if (arr[a][b] || ((a == 0 || arr[a - 1][b]) && (b == 0 || arr[a][b - 1])) || ((a == arr.size() - 1 || arr[a + 1][b]) && (b == arr[0].size() - 1 || arr[a][b + 1]))) {
| ~~^~~~~~~~~~~~~~~~~
furniture.cpp:57:132: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
57 | if (arr[a][b] || ((a == 0 || arr[a - 1][b]) && (b == 0 || arr[a][b - 1])) || ((a == arr.size() - 1 || arr[a + 1][b]) && (b == arr[0].size() - 1 || arr[a][b + 1]))) {
| ~~^~~~~~~~~~~~~~~~~~~~
furniture.cpp:68:23: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<std::vector<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
68 | if (a != arr.size() - 1) {
| ~~^~~~~~~~~~~~~~~~~
furniture.cpp:71:23: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
71 | if (b != arr[0].size() - 1) {
| ~~^~~~~~~~~~~~~~~~~~~~
furniture.cpp: In function 'int main()':
furniture.cpp:134:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
134 | freopen("", "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~
furniture.cpp:135:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
135 | freopen("", "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
344 KB |
Output is correct |
| 2 |
Correct |
1 ms |
348 KB |
Output is correct |
| 3 |
Correct |
2 ms |
348 KB |
Output is correct |
| 4 |
Correct |
3 ms |
604 KB |
Output is correct |
| 5 |
Correct |
3 ms |
476 KB |
Output is correct |
| 6 |
Correct |
4 ms |
604 KB |
Output is correct |
| 7 |
Correct |
3 ms |
600 KB |
Output is correct |
| 8 |
Correct |
3 ms |
604 KB |
Output is correct |
| 9 |
Correct |
3 ms |
600 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
344 KB |
Output is correct |
| 2 |
Correct |
1 ms |
348 KB |
Output is correct |
| 3 |
Correct |
2 ms |
348 KB |
Output is correct |
| 4 |
Correct |
3 ms |
604 KB |
Output is correct |
| 5 |
Correct |
3 ms |
476 KB |
Output is correct |
| 6 |
Correct |
4 ms |
604 KB |
Output is correct |
| 7 |
Correct |
3 ms |
600 KB |
Output is correct |
| 8 |
Correct |
3 ms |
604 KB |
Output is correct |
| 9 |
Correct |
3 ms |
600 KB |
Output is correct |
| 10 |
Correct |
8 ms |
1116 KB |
Output is correct |
| 11 |
Correct |
2 ms |
480 KB |
Output is correct |
| 12 |
Correct |
130 ms |
12368 KB |
Output is correct |
| 13 |
Correct |
49 ms |
9044 KB |
Output is correct |
| 14 |
Correct |
284 ms |
16904 KB |
Output is correct |
| 15 |
Correct |
244 ms |
16704 KB |
Output is correct |
| 16 |
Correct |
304 ms |
18248 KB |
Output is correct |
| 17 |
Correct |
234 ms |
19280 KB |
Output is correct |
| 18 |
Correct |
271 ms |
18656 KB |
Output is correct |
| 19 |
Correct |
247 ms |
19832 KB |
Output is correct |
| 20 |
Correct |
228 ms |
19956 KB |
Output is correct |
| 21 |
Correct |
275 ms |
19924 KB |
Output is correct |
