結果
問題 | No.2456 Stamp Art |
ユーザー | Forested |
提出日時 | 2023-09-01 21:46:46 |
言語 | C++17(gcc12) (gcc 12.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 352 ms / 5,000 ms |
コード長 | 3,294 bytes |
コンパイル時間 | 1,512 ms |
コンパイル使用メモリ | 136,120 KB |
実行使用メモリ | 38,964 KB |
最終ジャッジ日時 | 2024-06-11 17:54:57 |
合計ジャッジ時間 | 7,533 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge1 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 23 |
ソースコード
#ifndef LOCAL #define FAST_IO #endif // ============ #include <algorithm> #include <array> #include <bitset> #include <cassert> #include <cmath> #include <iomanip> #include <iostream> #include <list> #include <map> #include <numeric> #include <queue> #include <random> #include <set> #include <stack> #include <string> #include <tuple> #include <unordered_map> #include <unordered_set> #include <utility> #include <vector> #define OVERRIDE(a, b, c, d, ...) d #define REP2(i, n) for (i32 i = 0; i < (i32)(n); ++i) #define REP3(i, m, n) for (i32 i = (i32)(m); i < (i32)(n); ++i) #define REP(...) OVERRIDE(__VA_ARGS__, REP3, REP2)(__VA_ARGS__) #define PER(i, n) for (i32 i = (i32)(n) - 1; i >= 0; --i) #define ALL(x) begin(x), end(x) using namespace std; using u32 = unsigned int; using u64 = unsigned long long; using i32 = signed int; using i64 = signed long long; using f64 = double; using f80 = long double; template <typename T> using Vec = vector<T>; template <typename T> bool chmin(T &x, const T &y) { if (x > y) { x = y; return true; } return false; } template <typename T> bool chmax(T &x, const T &y) { if (x < y) { x = y; return true; } return false; } #ifdef INT128 using u128 = __uint128_t; using i128 = __int128_t; istream &operator>>(istream &is, i128 &x) { i64 v; is >> v; x = v; return is; } ostream &operator<<(ostream &os, i128 x) { os << (i64)x; return os; } istream &operator>>(istream &is, u128 &x) { u64 v; is >> v; x = v; return is; } ostream &operator<<(ostream &os, u128 x) { os << (u64)x; return os; } #endif [[maybe_unused]] constexpr i32 INF = 1000000100; [[maybe_unused]] constexpr i64 INF64 = 3000000000000000100; struct SetUpIO { SetUpIO() { #ifdef FAST_IO ios::sync_with_stdio(false); cin.tie(nullptr); #endif cout << fixed << setprecision(15); } } set_up_io; // ============ #ifdef DEBUGF #else #define DBG(x) (void)0 #endif int main() { i32 h, w; cin >> h >> w; Vec<string> s(h); REP(i, h) { cin >> s[i]; } Vec<Vec<i32>> sum(h + 1, Vec<i32>(w + 1, 0)); REP(i, h) REP(j, w) { sum[i + 1][j + 1] = sum[i][j + 1] + sum[i + 1][j] - sum[i][j] + (s[i][j] == '#'); } i32 ok = 1, ng = max(h, w) + 1; const auto judge = [&](i32 x) -> bool { Vec<Vec<i32>> add(h + 1, Vec<i32>(w + 1, 0)); REP(i, h - x + 1) REP(j, w - x + 1) { i32 s = sum[i + x][j + x] - sum[i][j + x] - sum[i + x][j] + sum[i][j]; if (s == x * x) { add[i][j] += 1; add[i + x][j] -= 1; add[i][j + x] -= 1; add[i + x][j + x] += 1; } } REP(i, h) REP(j, w + 1) { add[i + 1][j] += add[i][j]; } REP(i, h + 1) REP(j, w) { add[i][j + 1] += add[i][j]; } REP(i, h) REP(j, w) { char c = add[i][j] ? '#' : '.'; if (c != s[i][j]) { return false; } } return true; }; while (ng - ok > 1) { i32 mid = (ok + ng) / 2; if (judge(mid)) { ok = mid; } else { ng = mid; } } cout << ok << '\n'; }