結果
問題 | No.2456 Stamp Art |
ユーザー | pitP |
提出日時 | 2023-09-02 14:27:45 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 3,951 ms / 5,000 ms |
コード長 | 3,980 bytes |
コンパイル時間 | 4,120 ms |
コンパイル使用メモリ | 274,060 KB |
実行使用メモリ | 85,760 KB |
最終ジャッジ日時 | 2024-06-11 21:06:20 |
合計ジャッジ時間 | 48,530 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
(要ログイン)
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
5,248 KB |
testcase_01 | AC | 3 ms
5,248 KB |
testcase_02 | AC | 2 ms
5,248 KB |
testcase_03 | AC | 2,284 ms
85,632 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | AC | 3,757 ms
85,760 KB |
testcase_07 | AC | 2,446 ms
85,632 KB |
testcase_08 | AC | 1,218 ms
85,760 KB |
testcase_09 | AC | 2,867 ms
85,504 KB |
testcase_10 | AC | 3,483 ms
85,632 KB |
testcase_11 | AC | 2,696 ms
85,632 KB |
testcase_12 | AC | 1,851 ms
85,632 KB |
testcase_13 | AC | 3,951 ms
85,760 KB |
testcase_14 | AC | 3,305 ms
85,504 KB |
testcase_15 | AC | 2,054 ms
85,760 KB |
testcase_16 | AC | 1,508 ms
46,604 KB |
testcase_17 | AC | 3 ms
5,376 KB |
testcase_18 | AC | 3 ms
5,376 KB |
testcase_19 | AC | 1,414 ms
58,112 KB |
testcase_20 | AC | 3,149 ms
85,760 KB |
testcase_21 | AC | 2,991 ms
78,336 KB |
testcase_22 | AC | 3,390 ms
85,632 KB |
testcase_23 | AC | 86 ms
11,520 KB |
testcase_24 | AC | 239 ms
11,556 KB |
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 struct cumulative_sum_2d{ int H,W; vector<vector<ll>> val; vector<vector<ll>> wa; cumulative_sum_2d(int H_input, int W_input){init(H_input,W_input);} void init(int H_input, int W_input){ H = H_input; W = W_input; val.assign(H,vector<ll>(W,0ll)); wa.assign(H+1,vector<ll>(W+1,0ll)); } void set(int i, int j, ll value){ val[i][j] = value; } void add(int i, int j, ll value){ val[i][j] += value; } void build(){ for(int i=0;i<H;i++){ for(int j=0;j<W;j++){ wa[i+1][j+1] = wa[i][j+1] + wa[i+1][j] - wa[i][j] + val[i][j]; } } } // [i1, i2) x [j1, j2) ll query(int i1,int j1, int i2, int j2){ return wa[i2][j2] - wa[i2][j1] - wa[i1][j2] + wa[i1][j1]; } }; template<typename T> struct BIT2D{ int H, W; vector<vector<T>> bit; BIT2D(int _H, int _W) : H(_H), W(_W){ bit.resize(H, vector<T>(W, 0)); } // void add(int i, int j, T v){ for(int a = i + 1; a <= H; a += (a & -a)){ for(int b = j + 1; b <= W; b += (b & - b)){ bit[a - 1][b - 1] += v; } } } // T _sum(int i, int j){ T s = 0; for(int a = i; a > 0; a -= (a & -a)){ for(int b = j; b > 0; b -= (b & -b)){ s += bit[a - 1][b - 1]; } } return s; } //[i1, i2) x [j1, j2) T sum(int i1, int j1, int i2, int j2){ return _sum(i2, j2) - _sum(i2, j1) - _sum(i1, j2) + _sum(i1, j1); } }; int H,W; char S[2020][2020]; int wa[2020][2020]; bool is_ok(int k){ cumulative_sum_2d acc(H, W); rep(i,H)rep(j,W)if(S[i][j]=='#')acc.add(i,j,1); acc.build(); BIT2D<int> BIT(H, W); rep(i,H-k+1)rep(j,W-k+1){ if(acc.query(i,j,i+k,j+k) == (k * k)) BIT.add(i,j,1); } rep(i,H)rep(j,W){ int wa = BIT.sum(max(i - k + 1, 0), max(j - k + 1, 0), i + 1, j + 1); if (S[i][j]=='.'){ if (wa > 0) return false; } else{ if (wa == 0) return false; } } 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; }