結果
| 問題 |
No.1427 Simplified Tetris
|
| コンテスト | |
| ユーザー |
emthrm
|
| 提出日時 | 2021-03-12 23:04:57 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
RE
|
| 実行時間 | - |
| コード長 | 4,079 bytes |
| コンパイル時間 | 2,513 ms |
| コンパイル使用メモリ | 216,952 KB |
| 最終ジャッジ日時 | 2025-01-19 15:34:56 |
|
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 RE * 1 |
| other | AC * 26 RE * 11 |
ソースコード
#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;
#define FOR(i,m,n) for(int i=(m);i<(n);++i)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) (v).begin(),(v).end()
using ll = long long;
constexpr int INF = 0x3f3f3f3f;
constexpr long long LINF = 0x3f3f3f3f3f3f3f3fLL;
constexpr double EPS = 1e-8;
constexpr int MOD = 1000000007;
// constexpr int MOD = 998244353;
constexpr int dy[] = {1, 0, -1, 0}, dx[] = {0, -1, 0, 1};
constexpr int dy8[] = {1, 1, 0, -1, -1, -1, 0, 1}, dx8[] = {0, -1, -1, -1, 0, 1, 1, 1};
template <typename T, typename U> inline bool chmax(T &a, U b) { return a < b ? (a = b, true) : false; }
template <typename T, typename U> inline bool chmin(T &a, U b) { return a > b ? (a = b, true) : false; }
struct IOSetup {
IOSetup() {
std::cin.tie(nullptr);
std::ios_base::sync_with_stdio(false);
std::cout << fixed << setprecision(20);
}
} iosetup;
struct HopcroftKarp {
std::vector<int> match;
HopcroftKarp(int left, int right) : left(left), graph(left), match(left + right, -1), level(left), used(left, -1) {}
void add_edge(int u, int v) { graph[u].emplace_back(left + v); }
int solve() {
int res = 0;
while (true) {
bfs();
int tmp = 0;
for (int i = 0; i < left; ++i) {
if (match[i] == -1) {
if (dfs(i)) ++tmp;
++timestamp;
}
}
if (tmp == 0) return res;
res += tmp;
}
}
private:
int left, timestamp = 0;
std::vector<std::vector<int>> graph;
std::vector<int> level, used;
void bfs() {
std::fill(level.begin(), level.end(), -1);
std::queue<int> que;
for (int i = 0; i < left; ++i) {
if (match[i] == -1) {
que.emplace(i);
level[i] = 0;
}
}
while (!que.empty()) {
int ver = que.front(); que.pop();
for (int e : graph[ver]) {
if (match[e] != -1 && level[match[e]] == -1) {
level[match[e]] = level[ver] + 1;
que.emplace(match[e]);
}
}
}
}
bool dfs(int ver) {
used[ver] = timestamp;
for (int e : graph[ver]) {
int tmp = match[e];
if (tmp == -1 || (used[tmp] < timestamp && level[tmp] == level[ver] + 1 && dfs(tmp))) {
used[ver] = timestamp;
match[e] = ver;
match[ver] = e;
return true;
}
}
return false;
}
};
int main() {
vector<char> ch;
REP(i, 26) ch.emplace_back('a' + i);
REP(i, 26) ch.emplace_back('A' + i);
int h, w; cin >> h >> w;
vector<string> s(h); REP(i, h) cin >> s[i];
REP(i, h) {
if (count(ALL(s[i]), '#') == w || (i + 1 < h && count(ALL(s[i]), '#') > 0 && count(ALL(s[i + 1]), '#') == 0)) {
cout << "No\n";
return 0;
}
}
int ub = h;
while (ub > 0 && count(ALL(s[ub - 1]), '#') > 0) --ub;
int y = h - ub;
REP(b, 1 << (y + 1)) {
vector<string> t;
REP(i, y) {
if (b >> i & 1) t.emplace_back(w, '#');
t.emplace_back(s[ub + i]);
}
if (b >> y & 1) t.emplace_back(w, '#');
if (t.size() > h) continue;
reverse(ALL(t));
while (t.size() < h) t.emplace_back(w, '.');
reverse(ALL(t));
vector id(h, vector(w, -1));
int num[2] = {};
REP(i, h) REP(j, w) {
if (t[i][j] == '#') id[i][j] = num[(i + j) & 1]++;
}
if (num[0] != num[1]) continue;
HopcroftKarp hk(num[0], num[1]);
REP(i, h) REP(j, w) {
if ((i + j) % 2 == 1 || id[i][j] == -1) continue;
REP(k, 4) {
int r = i + dy[k], c = j + dx[k];
if (0 <= r && r < h && 0 <= c && c < w && id[r][c] != -1) hk.add_edge(id[i][j], id[r][c]);
}
}
if (hk.solve() < num[0]) continue;
int ch_idx = 0;
REP(i, h) REP(j, w) {
if ((i + j) % 2 == 1 || id[i][j] == -1) continue;
REP(k, 4) {
int r = i + dy[k], c = j + dx[k];
if (0 <= r && r < h && 0 <= c && c < w && id[r][c] != -1 && hk.match[id[i][j]] - num[0] == id[r][c]) {
t[i][j] = t[r][c] = ch[ch_idx++];
}
}
}
cout << "Yes\n";
REP(i, h) cout << t[i] << '\n';
return 0;
}
assert(false);
cout << "No\n";
return 0;
}
emthrm