結果
問題 | No.2064 Smallest Sequence on Grid |
ユーザー |
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提出日時 | 2022-09-02 21:37:37 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 756 ms / 3,000 ms |
コード長 | 2,959 bytes |
コンパイル時間 | 2,134 ms |
コンパイル使用メモリ | 209,116 KB |
最終ジャッジ日時 | 2025-02-07 00:54:13 |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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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>using namespace std;//using namespace atcoder;struct fast_ios { fast_ios(){ cin.tie(0); ios::sync_with_stdio(false); cout << fixed << setprecision(20); }; } fast_ios_;#define FOR(i, begin, end) for(int i=(begin);i<(end);i++)#define REP(i, n) FOR(i,0,n)#define IFOR(i, begin, end) for(int i=(end)-1;i>=(begin);i--)#define IREP(i, n) IFOR(i,0,n)#define Sort(v) sort(v.begin(), v.end())#define Reverse(v) reverse(v.begin(), v.end())#define all(v) v.begin(),v.end()#define SZ(v) ((int)v.size())#define Lower_bound(v, x) distance(v.begin(), lower_bound(v.begin(), v.end(), x))#define Upper_bound(v, x) distance(v.begin(), upper_bound(v.begin(), v.end(), x))#define chmax(a, b) a = max(a, b)#define chmin(a, b) a = min(a, b)#define bit(n) (1LL<<(n))#define debug(x) cout << #x << "=" << x << endl;#define vdebug(v) { cout << #v << "=" << endl; REP(i_debug, (int)v.size()){ cout << v[i_debug] << ","; } cout << endl; }#define mdebug(m) { cout << #m << "=" << endl; REP(i_debug, (int)m.size()){ REP(j_debug, (int)m[i_debug].size()){ cout << m[i_debug][j_debug] << ",";} cout << endl;} }#define pb push_back#define fi first#define se second#define int long long#define INF 1000000000000000000template<typename T> istream &operator>>(istream &is, vector<T> &v){ for (auto &x : v) is >> x; return is; }template<typename T> ostream &operator<<(ostream &os, vector<T> &v){ for(int i = 0; i < (int)v.size(); i++) { cout << v[i]; if(i != (int)v.size() - 1)cout << endl; }; return os; }template<typename T1, typename T2> ostream &operator<<(ostream &os, pair<T1, T2> p){ cout << '(' << p.first << ',' << p.second << ')'; return os; }template<typename T> void Out(T x) { cout << x << endl; }template<typename T1, typename T2> void chOut(bool f, T1 y, T2 n) { if(f) Out(y); else Out(n); }using vec = vector<int>;using mat = vector<vec>;using Pii = pair<int, int>;using v_bool = vector<bool>;using v_Pii = vector<Pii>;//int dx[4] = {1,0,-1,0};//int dy[4] = {0,1,0,-1};//char d[4] = {'D','R','U','L'};//const int mod = 1000000007;const int mod = 998244353;signed main(){int H, W; cin >> H >> W;vector<string> S(H); cin >> S;string ans = "";ans += S[0][0];vector<Pii> p({Pii(0, 0)});REP(k, H + W - 2){int mm = INF;vector<vector<Pii>> p2(26);for(Pii q: p){int x = q.fi, y = q.se;if(x + 1 < H){p2[S[x + 1][y] - 'a'].pb(Pii(x + 1, y));chmin(mm, (int)(S[x + 1][y] - 'a'));}if(y + 1 < W){p2[S[x][y + 1] - 'a'].pb(Pii(x, y + 1));chmin(mm, (int)(S[x][y + 1] - 'a'));}}ans += 'a' + mm;Sort(p2[mm]);p.resize(0);REP(i, SZ(p2[mm])){if(i == 0 || p2[mm][i] != p2[mm][i - 1]){p.pb(p2[mm][i]);}}}Out(ans);return 0;}