結果
問題 | No.2064 Smallest Sequence on Grid |
ユーザー |
![]() |
提出日時 | 2022-09-03 01:28:37 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 402 ms / 3,000 ms |
コード長 | 2,384 bytes |
コンパイル時間 | 4,826 ms |
コンパイル使用メモリ | 256,816 KB |
最終ジャッジ日時 | 2025-02-07 02:03:52 |
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 29 |
ソースコード
#include<bits/stdc++.h>#include<atcoder/all>using namespace atcoder;//using mint = modint1000000007;using mint = modint998244353;//g++ -I/opt/ac-library ./**.cppusing namespace std;using ll = long long;using ull = unsigned long long;//const long long MOD = 1000000007;const long long MOD = 998244353;const long double PI = 3.14159265358979;const long long INF = 1LL<<60;template <typename T> bool chmax(T &a, const T& b){if(a < b){a = b;return true;}return false;}template <typename T> bool chmin(T &a, const T& b){if(a > b){a = b;return true;}return false;}#define deb(var) do{cout << #var << " : "; view(var);}while(0)template<typename T> void view(T e){cout << e << endl;}void view(vector<string>& v){cout << endl;for(auto& s :v){view(s);}cout << endl;}template<typename T> void view(vector<T>& v){for(auto& e :v){cout << e << " ";}cout << endl;}template<typename T> void view(vector<vector<T>>& vv){cout << endl;for(auto& v:vv){view(v);}}ll gcd(ll a, ll b){if (b == 0) return a;else return gcd(b, a % b);}ll lcm(ll x,ll y){return ll(x/gcd(x,y))*y;}template<typename T> using min_priority_queue = priority_queue<T, vector<T>, greater<T>>;#define all(x) x.begin(), x.end()#define rall(x) x.rbegin(), x.rend()#define int long longint32_t main() {int h, w; cin >> h >> w;vector<string> s(h);for (int i=0; i<h; i++) {cin >> s[i];}vector<vector<bool>> dp(h, vector<bool> (w, false));dp[0][0] = true;for (int k=0; k<h + w - 3; k++) {char mn = 'z';for (int i=0; i<=k; i++) {int j = k - i;if (i >= h || j >= w) continue;if (!dp[i][j]) continue;if (i < h - 1) chmin(mn, s[i + 1][j]);if (j < w - 1) chmin(mn, s[i][j + 1]);}for (int i=0; i<=k; i++) {int j = k - i;if (i >= h || j >= w) continue;if (!dp[i][j]) continue;if (i < h - 1 && s[i + 1][j] == mn) dp[i + 1][j] = true;if (j < w - 1 && s[i][j + 1] == mn) dp[i][j + 1] = true;}}int i = h - 1, j = w - 1;string ans;while (!(i == 0 && j == 0)) {ans.push_back(s[i][j]);if (i > 0 && dp[i - 1][j]) {i--;}else {j--;}}ans.push_back(s[0][0]);reverse(all(ans));cout << ans << "\n";}