結果
| 問題 | No.2411 Reverse Directions |
| ユーザー |
 woodywoody
|
| 提出日時 | 2023-08-11 22:31:31 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 103 ms / 2,000 ms |
| コード長 | 7,220 bytes |
| コンパイル時間 | 4,502 ms |
| コンパイル使用メモリ | 246,304 KB |
| 実行使用メモリ | 23,632 KB |
| 最終ジャッジ日時 | 2024-11-18 17:14:10 |
| 合計ジャッジ時間 | 6,931 ms |
|
ジャッジサーバーID （参考情報） |
judge2 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 29 |
ソースコード
#include<bits/stdc++.h>
#include<atcoder/all>
#define rep(i,b) for(int i=0;i<b;i++)
#define rrep(i,b) for(int i=b-1;i>=0;i--)
#define rep1(i,b) for(int i=1;i<b;i++)
#define repx(i,x,b) for(int i=x;i<b;i++)
#define rrepx(i,x,b) for(int i=b-1;i>=x;i--)
#define fore(i,a) for(auto& i:a)
#define rng(x) (x).begin(), (x).end()
#define rrng(x) (x).rbegin(), (x).rend()
#define sz(x) ((int)(x).size())
#define pb push_back
#define fi first
#define se second
#define pcnt __builtin_popcountll
using namespace std;
using namespace atcoder;
using ll = long long;
using ld = long double;
template<typename T> using mpq = priority_queue<T, vector<T>, greater<T>>;
template<typename T> bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<typename T> bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }
template<typename T> ll sumv(const vector<T>&a){ll res(0);for(auto&&x:a)res+=x;return res;}
bool yn(bool a) { if(a) {cout << "Yes" << endl; return true;} else {cout << "No" << endl; return false;}}
#define retval(x) {cout << #x << endl; return;}
#define cout2(x,y) cout << x << " " << y << endl;
#define coutp(p) cout << p.fi << " " << p.se << endl;
#define out cout << ans << endl;
#define outd cout << fixed << setprecision(20) << ans << endl;
#define outm cout << ans.val() << endl;
#define outv fore(yans , ans) cout << yans << "\n";
#define outdv fore(yans , ans) cout << yans.val() << "\n";
#define coutv(v) {fore(vy , v) {cout << vy << " ";} cout << endl;}
#define coutv2(v) fore(vy , v) cout << vy << "\n";
#define coutvm(v) {fore(vy , v) {cout << vy.val() << " ";} cout << endl;}
#define coutvm2(v) fore(vy , v) cout << vy.val() << "\n";
using pll = pair<ll,ll>;using pil = pair<int,ll>;using pli = pair<ll,int>;using pii = pair<int,int>;using pdd = pair<ld,ld>;
using vi = vector<int>;using vd = vector<ld>;using vl = vector<ll>;using vs = vector<string>;using vb = vector<bool>;
using vpii = vector<pii>;using vpli = vector<pli>;using vpll = vector<pll>;using vpil = vector<pil>;
using vvi = vector<vector<int>>;using vvl = vector<vector<ll>>;using vvs = vector<vector<string>>;using vvb = vector<vector<bool>>;
using vvpii = vector<vector<pii>>;using vvpli = vector<vector<pli>>;using vvpll = vector<vpll>;using vvpil = vector<vpil>;
using mint = modint998244353;
//using mint = modint1000000007;
//using mint = dynamic_modint<0>;
using vm = vector<mint>;
using vvm = vector<vector<mint>>;
vector<int> dx={1,0,-1,0,1,1,-1,-1},dy={0,1,0,-1,1,-1,1,-1};
ll gcd(ll a, ll b) { return a?gcd(b%a,a):b;}
ll lcm(ll a, ll b) { return a/gcd(a,b)*b;}
#define yes {cout <<"Yes"<<endl;}
#define no {cout <<"No"<<endl;}
const double eps = 1e-10;
const ll LINF = 1001002003004005006ll;
const int INF = 1001001001;
#ifdef MY_LOCAL_DEBUG
#define show(x) cerr<<#x<<" = "<<x<<endl
#define showp(p) cerr<<#p<<" = "<<p.fi<<" : "<<p.se<<endl
#define show2(x,y) cerr<<#x<<" = "<<x<<" : "<<#y<<" = "<<y<<endl
#define show3(x,y,z) cerr<<#x<<" = "<<x<<" : "<<#y<<" = "<<y<<" : "<<#z<<" = "<<z<<endl
#define show4(x,y,z,x2) cerr<<#x<<" = "<<x<<" : "<<#y<<" = "<<y<<" : "<<#z<<" = "<<z<<" : "<<#x2<<" = "<<x2<<endl
#define test(x) cout << "test" << x << endl
#define showv(v) {fore(vy , v) {cout << vy << " ";} cout << endl;}
#define showv2(v) fore(vy , v) cout << vy << "\n";
#define showvm(v) {fore(vy , v) {cout << vy.val() << " ";} cout << endl;}
#define showvm2(v) fore(vy , v) cout << vy.val() << "\n";
#else
#define show(x)
#define showp(p)
#define show2(x,y)
#define show3(x,y,z)
#define show4(x,y,z,x2)
#define test(x)
#define showv(v)
#define showv2(v)
#define showvm(v)
#define showvm2(v)
#endif
struct edge{
int from,to;
ll cost;
edge(int from_=0,int to_=0,ll cost_=0) : from(from_),to(to_),cost(cost_) {}
bool operator<(const edge& ot){
return cost < ot.cost;
}
};
void solve(){
int h,w,k,l,r; cin>>h>>w>>k>>l>>r;
vector<vector<edge>> e(h*w);
vs s(h);
rep(i,h) cin>>s[i];
vvi p(2,vi(h*w,-1));
rep(i,h) rep(j,w){
if (s[i][j] == '#') continue;
rep(kk,4){
int x,y;
x = i + dx[kk];
y = j + dy[kk];
if (x <= h-1 && x >= 0 && y <= w-1 && y >= 0 && s[x][y]=='.'){
e[i*w + j].pb(edge(i*w + j, x*w + y , 1));
}
}
}
int d1 = l-1;
int d2 = (k-r);
vvl dist(2 , vl(h*w,LINF));
rep(i,2){
mpq<pli> q;
int st = (h*w-1)*i;
dist[i][st] = 0;
q.push({dist[i][st] , st});
while(!q.empty()){
pli pp = q.top();
q.pop();
ll nowDist = pp.first;
int from = pp.second;
if (dist[i][from] < nowDist) continue;
fore(ey , e[from]){
int to = ey.to;
ll cost = ey.cost;
if (chmin(dist[i][to] , nowDist + cost)){
p[i][to] = from;
q.push({dist[i][to] , to});
}
}
}
}
bool ok = false;
string ans;
rep(i,h) rep(j,w){
int f = i*w + j;
if (ans != "") continue;
if (dist[0][f] > d1) continue;
if (dist[1][f] > d2) continue;
if (dist[0][f]%2 != d1%2) continue;
if (dist[1][f]%2 != d2%2) continue;
if ((r-l+1)%2==1) continue;
rep(kk,2){
if (ans!="") continue;
int x,y,x2,y2;
x = i + dx[kk];
x2 = i + dx[kk+2];
y = j + dy[kk];
y2 = j + dy[kk+2];
bool ok2 = true;
if (!(x <= h-1 && x >= 0 && y <= w-1 && y >= 0 && s[x][y]=='.')) ok2 = false;
if ((l!=r) && !(x2 <= h-1 && x2 >= 0 && y2 <= w-1 && y2 >= 0 && s[x2][y2]=='.')) ok2 = false;
if (!ok2) continue;
ok = true;
int now = f;
auto getChar = [&](int a,int b){
char ret;
if (abs(b-a)==1){
if (b>a) ret = 'L';
else ret = 'R';
}else{
if (b>a) ret = 'U';
else ret = 'D';
}
return ret;
};
while(now!=0){
int nxt = p[0][now];
ans += getChar(now,nxt);
swap(now,nxt);
}
string ss;
if (kk==0) ss = "DU";
else if(kk==1) ss = "RL";
else if(kk==2) ss = "UD";
else ss = "LR";
reverse(rng(ans));
int cnt = (r-l+1) + (d1 - dist[0][f]) + (d2 - dist[1][f]);
cnt /= 2;
rep(ii,cnt) ans += ss;
now = f;
while(now!=(h*w-1)){
int nxt = p[1][now];
ans += getChar(nxt,now);
swap(now,nxt);
}
}
}
if (!ok){
retval(No);
}
yes;
out;
return;
}
int main(){
ios::sync_with_stdio(false);
cin.tie(0);
int t = 1;
//cin>>t;
rep(i,t){
solve();
}
return 0;
}