結果
問題 | No.2456 Stamp Art |
ユーザー | tokusakurai |
提出日時 | 2023-09-01 22:31:43 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 934 ms / 5,000 ms |
コード長 | 6,001 bytes |
コンパイル時間 | 2,087 ms |
コンパイル使用メモリ | 213,480 KB |
実行使用メモリ | 54,784 KB |
最終ジャッジ日時 | 2024-06-11 17:59:41 |
合計ジャッジ時間 | 15,101 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
6,812 KB |
testcase_01 | AC | 2 ms
6,816 KB |
testcase_02 | AC | 1 ms
6,940 KB |
testcase_03 | AC | 668 ms
54,656 KB |
testcase_04 | AC | 2 ms
6,944 KB |
testcase_05 | AC | 2 ms
6,944 KB |
testcase_06 | AC | 762 ms
54,656 KB |
testcase_07 | AC | 790 ms
54,784 KB |
testcase_08 | AC | 737 ms
54,528 KB |
testcase_09 | AC | 824 ms
54,528 KB |
testcase_10 | AC | 934 ms
54,528 KB |
testcase_11 | AC | 752 ms
54,532 KB |
testcase_12 | AC | 768 ms
54,656 KB |
testcase_13 | AC | 907 ms
54,656 KB |
testcase_14 | AC | 920 ms
54,528 KB |
testcase_15 | AC | 660 ms
54,528 KB |
testcase_16 | AC | 308 ms
29,092 KB |
testcase_17 | AC | 2 ms
6,944 KB |
testcase_18 | AC | 2 ms
6,944 KB |
testcase_19 | AC | 216 ms
37,432 KB |
testcase_20 | AC | 809 ms
54,532 KB |
testcase_21 | AC | 789 ms
49,792 KB |
testcase_22 | AC | 835 ms
54,532 KB |
testcase_23 | AC | 13 ms
6,944 KB |
testcase_24 | AC | 37 ms
7,496 KB |
testcase_25 | AC | 1 ms
6,940 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; #define rep(i, n) for (int i = 0; i < (n); i++) #define per(i, n) for (int i = (n)-1; i >= 0; i--) #define rep2(i, l, r) for (int i = (l); i < (r); i++) #define per2(i, l, r) for (int i = (r)-1; i >= (l); i--) #define each(e, v) for (auto &e : v) #define MM << " " << #define pb push_back #define eb emplace_back #define all(x) begin(x), end(x) #define rall(x) rbegin(x), rend(x) #define sz(x) (int)x.size() using ll = long long; using pii = pair<int, int>; using pil = pair<int, ll>; using pli = pair<ll, int>; using pll = pair<ll, ll>; template <typename T> using minheap = priority_queue<T, vector<T>, greater<T>>; template <typename T> using maxheap = priority_queue<T>; template <typename T> bool chmax(T &x, const T &y) { return (x < y) ? (x = y, true) : false; } template <typename T> bool chmin(T &x, const T &y) { return (x > y) ? (x = y, true) : false; } template <typename T> int flg(T x, int i) { return (x >> i) & 1; } int pct(int x) { return __builtin_popcount(x); } int pct(ll x) { return __builtin_popcountll(x); } int topbit(int x) { return (x == 0 ? -1 : 31 - __builtin_clz(x)); } int topbit(ll x) { return (x == 0 ? -1 : 63 - __builtin_clzll(x)); } int botbit(int x) { return (x == 0 ? -1 : __builtin_ctz(x)); } int botbit(ll x) { return (x == 0 ? -1 : __builtin_ctzll(x)); } template <typename T> void print(const vector<T> &v, T x = 0) { int n = v.size(); for (int i = 0; i < n; i++) cout << v[i] + x << (i == n - 1 ? '\n' : ' '); if (v.empty()) cout << '\n'; } template <typename T> void printn(const vector<T> &v, T x = 0) { int n = v.size(); for (int i = 0; i < n; i++) cout << v[i] + x << '\n'; } template <typename T> int lb(const vector<T> &v, T x) { return lower_bound(begin(v), end(v), x) - begin(v); } template <typename T> int ub(const vector<T> &v, T x) { return upper_bound(begin(v), end(v), x) - begin(v); } template <typename T> void rearrange(vector<T> &v) { sort(begin(v), end(v)); v.erase(unique(begin(v), end(v)), end(v)); } template <typename T> vector<int> id_sort(const vector<T> &v, bool greater = false) { int n = v.size(); vector<int> ret(n); iota(begin(ret), end(ret), 0); sort(begin(ret), end(ret), [&](int i, int j) { return greater ? v[i] > v[j] : v[i] < v[j]; }); return ret; } template <typename T> void reorder(vector<T> &a, const vector<int> &ord) { int n = a.size(); vector<T> b(n); for (int i = 0; i < n; i++) b[i] = a[ord[i]]; swap(a, b); } template <typename T> T floor(T x, T y) { assert(y != 0); if (y < 0) x = -x, y = -y; return (x >= 0 ? x / y : (x - y + 1) / y); } template <typename T> T ceil(T x, T y) { assert(y != 0); if (y < 0) x = -x, y = -y; return (x >= 0 ? (x + y - 1) / y : x / y); } template <typename S, typename T> pair<S, T> operator+(const pair<S, T> &p, const pair<S, T> &q) { return make_pair(p.first + q.first, p.second + q.second); } template <typename S, typename T> pair<S, T> operator-(const pair<S, T> &p, const pair<S, T> &q) { return make_pair(p.first - q.first, p.second - q.second); } template <typename S, typename T> istream &operator>>(istream &is, pair<S, T> &p) { S a; T b; is >> a >> b; p = make_pair(a, b); return is; } template <typename S, typename T> ostream &operator<<(ostream &os, const pair<S, T> &p) { return os << p.first << ' ' << p.second; } struct io_setup { io_setup() { ios_base::sync_with_stdio(false); cin.tie(NULL); cout << fixed << setprecision(15); cerr << fixed << setprecision(15); } } io_setup; constexpr int inf = (1 << 30) - 1; constexpr ll INF = (1LL << 60) - 1; // constexpr int MOD = 1000000007; constexpr int MOD = 998244353; template <typename T> struct Cumulative_Sum_2D { vector<vector<T>> v; const int n, m; Cumulative_Sum_2D(const vector<vector<T>> &v) : v(v), n((int)v.size()), m((int)v[0].size()) {} Cumulative_Sum_2D(int n, int m) : v(n, vector<T>(m, 0)), n(n), m(m) {} // 累積和を構築 void build() { for (int i = 0; i < n; i++) { for (int j = 1; j < m; j++) v[i][j] += v[i][j - 1]; } for (int j = 0; j < m; j++) { for (int i = 1; i < n; i++) v[i][j] += v[i - 1][j]; } } // 区間 [lx,rx) × [ly,ry) に imos 法で加算 void add(int lx, int ly, int rx, int ry, T x) { lx = max(lx, 0), ly = max(ly, 0), rx = min(rx, n), ry = min(ry, m); if (rx <= lx || ry <= ly) return; v[lx][ly] += x; if (rx < n) v[rx][ly] -= x; if (ry < m) v[lx][ry] -= x; if (rx < n && ry < m) v[rx][ry] += x; } T fold(int a, int b) { return (a <= 0 || b <= 0 ? 0 : v[min(a, n) - 1][min(b, m) - 1]); } // 区間 [lx,rx) × [ly,ry) の総和 T sum(int lx, int ly, int rx, int ry) { lx = max(lx, 0), ly = max(ly, 0), rx = min(rx, n), ry = min(ry, m); if (rx <= lx || ry <= ly) return 0; return fold(lx, ly) - fold(rx, ly) - fold(lx, ry) + fold(rx, ry); } }; void solve() { int H, W; cin >> H >> W; vector<string> S(H); rep(i, H) cin >> S[i]; vector<vector<int>> a(H, vector<int>(W)); rep(i, H) rep(j, W) a[i][j] = (S[i][j] == '#' ? 1 : 0); Cumulative_Sum_2D<int> S1(a); S1.build(); auto judge = [&](int K) { Cumulative_Sum_2D<int> S2(H, W); rep(i, H - K + 1) rep(j, W - K + 1) { if (S1.sum(i, j, i + K, j + K) == K * K) { S2.add(i, j, i + K, j + K, 1); // } } S2.build(); rep(i, H) rep(j, W) { if (a[i][j] == 1 && S2.v[i][j] == 0) return false; } return true; }; int ok = 1, ng = min(H, W) + 1; while (ng - ok > 1) { int mid = (ok + ng) / 2; (judge(mid) ? ok : ng) = mid; } cout << ok << '\n'; } int main() { int T = 1; // cin >> T; while (T--) solve(); }