結果

問題 No.1315 渦巻洞穴
コンテスト
ユーザー tute7627
提出日時 2020-12-12 04:33:02
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 3 ms / 2,000 ms
コード長 4,552 bytes
コンパイル時間 2,476 ms
コンパイル使用メモリ 199,412 KB
最終ジャッジ日時 2025-01-16 22:44:37
ジャッジサーバーID
（参考情報） 		judge5 / judge3
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 79
権限があれば一括ダウンロードができます

ソースコード

diff # 

//#define _GLIBCXX_DEBUG

#include<bits/stdc++.h>
using namespace std;

#define endl '\n'
#define lfs cout<<fixed<<setprecision(10)
#define ALL(a)  (a).begin(),(a).end()
#define ALLR(a)  (a).rbegin(),(a).rend()
#define spa << " " <<
#define fi first
#define se second
#define MP make_pair
#define MT make_tuple
#define PB push_back
#define EB emplace_back
#define rep(i,n,m) for(ll i = (n); i < (ll)(m); i++)
#define rrep(i,n,m) for(ll i = (ll)(m) - 1; i >= (ll)(n); i--)
using ll = long long;
using ld = long double;
const ll MOD1 = 1e9+7;
const ll MOD9 = 998244353;
const ll INF = 1e18;
using P = pair<ll, ll>;
template<typename T1, typename T2>bool chmin(T1 &a,T2 b){if(a>b){a=b;return true;}else return false;}
template<typename T1, typename T2>bool chmax(T1 &a,T2 b){if(a<b){a=b;return true;}else return false;}
ll median(ll a,ll b, ll c){return a+b+c-max({a,b,c})-min({a,b,c});}
void ans1(bool x){if(x) cout<<"Yes"<<endl;else cout<<"No"<<endl;}
void ans2(bool x){if(x) cout<<"YES"<<endl;else cout<<"NO"<<endl;}
void ans3(bool x){if(x) cout<<"Yay!"<<endl;else cout<<":("<<endl;}
template<typename T1,typename T2>void ans(bool x,T1 y,T2 z){if(x)cout<<y<<endl;else cout<<z<<endl;}  
template<typename T>void debug(vector<vector<T>>&v,ll h,ll w){for(ll i=0;i<h;i++){cout<<v[i][0];for(ll j=1;j<w;j++)cout spa v[i][j];cout<<endl;}};
void debug(vector<string>&v,ll h,ll w){for(ll i=0;i<h;i++){for(ll j=0;j<w;j++)cout<<v[i][j];cout<<endl;}};
template<typename T>void debug(vector<T>&v,ll n){if(n!=0)cout<<v[0];for(ll i=1;i<n;i++)cout spa v[i];cout<<endl;};
template<typename T>vector<vector<T>>vec(ll x, ll y, T w){vector<vector<T>>v(x,vector<T>(y,w));return v;}
ll gcd(ll x,ll y){ll r;while(y!=0&&(r=x%y)!=0){x=y;y=r;}return y==0?x:y;}
vector<ll>dx={1,-1,0,0,1,1,-1,-1};vector<ll>dy={0,0,1,-1,1,-1,1,-1};
template<typename T>vector<T> make_v(size_t a,T b){return vector<T>(a,b);}
template<typename... Ts>auto make_v(size_t a,Ts... ts){return vector<decltype(make_v(ts...))>(a,make_v(ts...));}
template<typename T1, typename T2>ostream &operator<<(ostream &os, const pair<T1, T2>&p){return os << p.first << " " << p.second;}
template<typename T>ostream &operator<<(ostream &os, const vector<T> &v){for(auto &z:v)os << z << " ";cout<<"|"; return os;}
template<typename T>void rearrange(vector<ll>&ord, vector<T>&v){
  auto tmp = v;
  for(int i=0;i<tmp.size();i++)v[i] = tmp[ord[i]];
}
template<typename Head, typename... Tail>void rearrange(vector<ll>&ord,Head&& head, Tail&&... tail){
  rearrange(ord, head);
  rearrange(ord, tail...);
}
//mt19937 mt(chrono::steady_clock::now().time_since_epoch().count());
int popcount(ll x){return __builtin_popcountll(x);};
int poplow(ll x){return __builtin_ctzll(x);};
int pophigh(ll x){return 63 - __builtin_clzll(x);};

int main(){
  cin.tie(nullptr);
  ios_base::sync_with_stdio(false);
  ll res=0,buf=0;
  bool judge = true;
  ll s,t;cin>>s>>t;
  auto f=[](ll x)->P{
    ll ng=0,ok=1e5;
    while(ok-ng>=2){
      ll mid=(ok+ng)/2;
      if(mid*mid>=x)ok=mid;
      else ng=mid;
    }
    if(~ok&1)ok++;
    ll now=ok*ok;
    ll d=ok-1;
    if(now-x<=d)return MP(ok/2-(now-x),ok/2);
    else if(now-x<=2*d)return MP(-ok/2,ok/2-(now-x-d));
    else if(now-x<=3*d)return MP(-ok/2+(now-x-2*d),-ok/2);
    else return MP(ok/2,-ok/2+(now-x-3*d));
  };
  string dir="RLDU";
  P now=f(s);
  string ret;
  auto parity=[](P x){
    return (x.fi+x.se)&1;
  };
  auto mv=[&](P pt){
    assert(parity(now)==parity(pt));
    if(now.fi<=pt.fi){
      while(now.fi+2<=pt.fi){
        ret+="RRLR";
        now.fi+=2;
      }
      if(now.fi+1==pt.fi){
        if(now.se<pt.se)ret+="RDUD",now.fi++,now.se++;
        else ret+="RUDU",now.fi++,now.se--;
      }
    }
    else{
      while(now.fi-2>=pt.fi){
        ret+="LLRL";
        now.fi-=2;
      }
      if(now.fi-1==pt.fi){
        if(now.se<pt.se)ret+="LDUD",now.fi--,now.se++;
        else ret+="LUDU",now.fi--,now.se--;
      }
    }
    while(now.se<pt.se)ret+="DDUD",now.se+=2;
    while(now.se>pt.se)ret+="UUDU",now.se-=2;
  };
  now.fi++;
  ret+="RLR";
  auto goal=f(t);
  if(parity(now)==parity(goal))mv(goal);
  else{
    if(parity(now)==parity(f(8))){
      mv(f(8));
      ret+="URU";
      now.fi++;now.se-=2;
    }
    else{
      mv(f(9));
      ret+="UULDU";
      now.fi--;now.se-=2;
    }
    mv(goal);
  }
  cout<<0<<endl;
  cout<<ret.size()<<endl;
  cout<<ret<<endl;
  /*P st=f(s);cout<<st<<endl;
  for(auto c:ret){
    if(c=='R')st.fi++;
    if(c=='L')st.fi--;
    if(c=='D')st.se++;
    if(c=='U')st.se--;
    cout<<st spa c<<endl;
  }*/
  return 0;
}
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