結果
問題 | No.2456 Stamp Art |
ユーザー | pitP |
提出日時 | 2023-09-01 23:12:16 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 6,110 bytes |
コンパイル時間 | 5,290 ms |
コンパイル使用メモリ | 266,648 KB |
実行使用メモリ | 23,096 KB |
最終ジャッジ日時 | 2024-06-11 05:17:39 |
合計ジャッジ時間 | 18,513 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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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 | 1 ms
5,248 KB |
testcase_01 | AC | 1 ms
5,376 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 1,629 ms
23,004 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | WA | - |
testcase_07 | WA | - |
testcase_08 | AC | 555 ms
22,916 KB |
testcase_09 | WA | - |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | AC | 663 ms
22,920 KB |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | WA | - |
testcase_18 | AC | 1 ms
5,376 KB |
testcase_19 | WA | - |
testcase_20 | AC | 637 ms
22,916 KB |
testcase_21 | WA | - |
testcase_22 | WA | - |
testcase_23 | WA | - |
testcase_24 | WA | - |
testcase_25 | AC | 2 ms
5,376 KB |
ソースコード
#include <bits/stdc++.h> #include <atcoder/all> using namespace std; using namespace atcoder; istream &operator>>(istream &is, modint &a) { long long v; is >> v; a = v; return is; } ostream &operator<<(ostream &os, const modint &a) { return os << a.val(); } istream &operator>>(istream &is, modint998244353 &a) { long long v; is >> v; a = v; return is; } ostream &operator<<(ostream &os, const modint998244353 &a) { return os << a.val(); } istream &operator>>(istream &is, modint1000000007 &a) { long long v; is >> v; a = v; return is; } ostream &operator<<(ostream &os, const modint1000000007 &a) { return os << a.val(); } typedef long long ll; typedef vector<vector<int>> Graph; typedef pair<int, int> pii; typedef pair<ll, ll> pll; #define rep(i,n) for (int i = 0;i < (int)(n); i++) #define all(x) x.begin(), x.end() #define rall(x) x.rbegin(), x.rend() #define my_sort(x) sort(x.begin(), x.end()) #define my_max(x) *max_element(all(x)) #define my_min(x) *min_element(all(x)) template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; } template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; } const int INF = (1<<30) - 1; const ll LINF = (1LL<<62) - 1; const int MOD = 998244353; const int MOD2 = 1e9+7; const double PI = acos(-1); vector<int> di = {1,0,-1,0}; vector<int> dj = {0,1,0,-1}; #ifdef LOCAL # include <debug_print.hpp> # define debug(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__) #else # define debug(...) (static_cast<void>(0)) #endif template <typename T, typename F> struct SegmentTree2D { private: int id(int h, int w) { return h * 2 * W + w; } public: int H, W; vector<T> seg; const F f; const T I; SegmentTree2D(int h, int w, F _f, const T& i) : f(_f), I(i) { init(h, w); } void init(int h, int w) { H = W = 1; while (H < h) H <<= 1; while (W < w) W <<= 1; seg.assign(4 * H * W, I); } // build にのみ呼ぶ void set(int h, int w, const T& x) { seg[id(h + H, w + W)] = x; } void build() { // w in [W, 2W) for (int w = W; w < 2 * W; w++) { for (int h = H - 1; h; h--) { seg[id(h, w)] = f(seg[id(2 * h + 0, w)], seg[id(2 * h + 1, w)]); } } // h in [0, 2H) for (int h = 0; h < 2 * H; h++) { for (int w = W - 1; w; w--) { seg[id(h, w)] = f(seg[id(h, 2 * w + 0)], seg[id(h, 2 * w + 1)]); } } } T get(int h, int w) { return seg[id(h + H, w + W)]; } // T operator()(int h, int w) const { return seg[id(h + H, w + W)]; } void update(int h, int w, const T& x) { h += H, w += W; seg[id(h, w)] = x; for (int i = h >> 1; i; i >>= 1) { seg[id(i, w)] = f(seg[id(2 * i + 0, w)], seg[id(2 * i + 1, w)]); } for (; h; h >>= 1) { for (int j = w >> 1; j; j >>= 1) { seg[id(h, j)] = f(seg[id(h, 2 * j + 0)], seg[id(h, 2 * j + 1)]); } } } T _inner_query(int h, int w1, int w2) { T res = I; for (; w1 < w2; w1 >>= 1, w2 >>= 1) { if (w1 & 1) res = f(res, seg[id(h, w1)]), w1++; if (w2 & 1) --w2, res = f(res, seg[id(h, w2)]); } return res; } // [ (h1,w1), (h2,w2) ) 半開 T prod(int h1, int w1, int h2, int w2) { if (h1 >= h2 || w1 >= w2) return I; T res = I; h1 += H, h2 += H, w1 += W, w2 += W; for (; h1 < h2; h1 >>= 1, h2 >>= 1) { if (h1 & 1) res = f(res, _inner_query(h1, w1, w2)), h1++; if (h2 & 1) --h2, res = f(res, _inner_query(h2, w1, w2)); } return res; } }; /** * @brief 二次元セグメント木 * @docs docs/data-structure-2d/2d-segment-tree.md * https://nyaannyaan.github.io/library/data-structure-2d/2d-segment-tree.hpp */ // int f(int a, int b){return a + b;} int e(){return 0;} template <typename T> struct BinaryIndexedTree2D { int H, W; vector<vector<T>> bit; BinaryIndexedTree2D(int _H, int _W) : H(_H + 1), W(_W + 1) { bit.resize(H + 3, vector<T>(W + 3, 0)); } // 関数の入力のindexは0-originを想定 // (x,y)にwを足す // 範囲外の時は足さない void add(int x, int y, T w) { if (x < 0 || x >= H || y < 0 || y >= W) return; for (int a = (++y, ++x); a <= H; a += a & -a) { for (int b = y; b <= W; b += b & -b) { bit[a][b] += w; } } } // imos法で[(x1,y1) , (x2,y2)]にwを足す void imos(int x1, int y1, int x2, int y2, T w) { add(x1, y1, w); add(x1, y2 + 1, -w); add(x2 + 1, y1, -w); add(x2 + 1, y2 + 1, w); } // [(0,0) , (x,y)]の和 閉区間に注意! // x,y<0の時は0 x>=H y>=Wのときはx=H-1,y=W-1とみなす // ( imos法の時は (x,y)の値を返す ) T sum(int x, int y) { if (x < 0 || y < 0) return 0; if (x >= H) x = H - 1; if (y >= W) y = W - 1; T ret = 0; for (int a = (++y, ++x); a > 0; a -= a & -a) { for (int b = y; b > 0; b -= b & -b) { ret += bit[a][b]; } } return ret; } // [(x1,y1) , (x2,y2)] の和 // x1 > x2, y1 > y2の時はswap T sum(int x1, int y1, int x2, int y2) { if (x1 > x2 || y1 > y2) return T(0); return sum(x2, y2) - sum(x2, y1 - 1) - sum(x1 - 1, y2) + sum(x1 - 1, y1 - 1); } }; /* * @brief 二次元Binary Indexed Tree */ int H,W; char S[2020][2020]; bool is_ok(int k){ BinaryIndexedTree2D<int> BIT(H,W); rep(i,H)rep(j,W){ int wa = BIT.sum(max(i - k + 1, 0), max(j - k + 1, 0), i, j); if (S[i][j] == '.'){ if (wa > 0) return false; } else{ if (wa == 0) BIT.add(i, j, 1); } } return true; } int main(){ cin.tie(0); ios_base::sync_with_stdio(false); cin >> H >> W; rep(i,H)rep(j,W)cin>>S[i][j]; int ok = 0, ng = H + 1; while(abs(ok - ng) > 1){ int k = (ok + ng) / 2; if (is_ok(k)) ok = k; else ng = k; } cout << ok << endl; }