結果
問題 | No.3071 Double Speedrun |
ユーザー |
👑 |
提出日時 | 2025-03-21 23:15:49 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 593 ms / 6,000 ms |
コード長 | 3,222 bytes |
コンパイル時間 | 5,098 ms |
コンパイル使用メモリ | 257,316 KB |
実行使用メモリ | 7,324 KB |
最終ジャッジ日時 | 2025-03-21 23:16:00 |
合計ジャッジ時間 | 10,178 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 14 |
ソースコード
#include<bits/stdc++.h> #include<atcoder/all> #define rep(i,n) for(int i=0;i<n;i++) using namespace std; using namespace atcoder; typedef long long ll; typedef pair<int, int> P; template <int m> ostream& operator<<(ostream& os, const static_modint<m>& a) {os << a.val(); return os;} template <int m> ostream& operator<<(ostream& os, const dynamic_modint<m>& a) {os << a.val(); return os;} template <int m> istream& operator>>(istream& is, static_modint<m>& a) {long long x; is >> x; a = x; return is;} template <int m> istream& operator>>(istream& is, dynamic_modint<m>& a) {long long x; is >> x; a = x; return is;} template<typename T> istream& operator>>(istream& is, vector<T>& v){int n = v.size(); assert(n > 0); rep(i, n) is >> v[i]; return is;} template<typename U, typename T> ostream& operator<<(ostream& os, const pair<U, T>& p){os << p.first << ' ' << p.second; return os;} template<typename T> ostream& operator<<(ostream& os, const vector<T>& v){int n = v.size(); rep(i, n) os << v[i] << (i == n - 1 ? "\n" : " "); return os;} template<typename T> ostream& operator<<(ostream& os, const vector<vector<T>>& v){int n = v.size(); rep(i, n) os << v[i] << (i == n - 1 ? "\n" : ""); return os;} template<typename T> ostream& operator<<(ostream& os, const set<T>& se){for(T x : se) os << x << " "; os << "\n"; return os;} template<typename T> ostream& operator<<(ostream& os, const unordered_set<T>& se){for(T x : se) os << x << " "; os << "\n"; return os;} template<typename S, auto op, auto e> ostream& operator<<(ostream& os, const atcoder::segtree<S, op, e>& seg){int n = seg.max_right(0, [](S){return true;}); rep(i, n) os << seg.get(i) << (i == n - 1 ? "\n" : " "); return os;} template<typename S, auto op, auto e, typename F, auto mapping, auto composition, auto id> ostream& operator<<(ostream& os, const atcoder::lazy_segtree<S, op, e, F, mapping, composition, id>& seg){int n = seg.max_right(0, [](S){return true;}); rep(i, n) os << seg.get(i) << (i == n - 1 ? "\n" : " "); return os;} template<typename T> void chmin(T& a, T b){a = min(a, b);} template<typename T> void chmax(T& a, T b){a = max(a, b);} using mint = modint998244353; int main(){ int h, w; cin >> h >> w; vector<string> s(h); cin >> s; vector<vector<mint>> dp(h + 1, vector<mint>(h + 1)); for(int y = 0; y < h; y++){ if(s[y][0] == '#') break; dp[0][y] = 1; } auto get_next = [&](int y, int x){ for(int z = y; z < h; z++) if(s[z][x] == '#') return z; return h; }; for(int x = 1; x < w; x++){ vector<vector<mint>> dp_old(h + 1, vector<mint>(h + 1)); swap(dp, dp_old); int na = get_next(0, x); for(int a = 0; a < h; a++){ if(a == na){ na = get_next(a + 1, x); continue; } int nb = get_next(a, x); for(int b = a + 1; b < h; b++){ if(b == nb){ nb = get_next(b + 1, x); continue; } mint val = dp_old[a][b]; dp[a][b] += val; dp[min(na, b)][b] -= val; dp[a][nb] -= val; dp[min(na, b)][nb] += val; } } for(int a = 0; a < h; a++){ for(int b = 0; b < h; b++){ dp[a][b + 1] += dp[a][b]; } } for(int a = 0; a < h; a++){ for(int b = 0; b < h; b++){ dp[a + 1][b] += dp[a][b]; } } } cout << dp[h - 2][h - 1] << "\n"; return 0; }