結果

問題 No.1916 Making Palindrome on Gird
ユーザー eQeeQe
提出日時 2022-05-31 09:23:24
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 1,605 ms / 3,000 ms
コード長 4,521 bytes
コンパイル時間 4,907 ms
コンパイル使用メモリ 280,008 KB
実行使用メモリ 87,680 KB
最終ジャッジ日時 2024-09-21 01:08:14
合計ジャッジ時間 15,601 ms
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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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 2 ms
5,248 KB
testcase_01 AC 2 ms
5,376 KB
testcase_02 AC 2 ms
5,376 KB
testcase_03 AC 2 ms
5,376 KB
testcase_04 AC 1 ms
5,376 KB
testcase_05 AC 1 ms
5,376 KB
testcase_06 AC 1 ms
5,376 KB
testcase_07 AC 2 ms
5,376 KB
testcase_08 AC 2 ms
5,376 KB
testcase_09 AC 2 ms
5,376 KB
testcase_10 AC 1 ms
5,376 KB
testcase_11 AC 1 ms
5,376 KB
testcase_12 AC 2 ms
5,376 KB
testcase_13 AC 3 ms
5,376 KB
testcase_14 AC 2 ms
5,376 KB
testcase_15 AC 66 ms
11,136 KB
testcase_16 AC 39 ms
8,064 KB
testcase_17 AC 150 ms
18,048 KB
testcase_18 AC 506 ms
41,728 KB
testcase_19 AC 483 ms
39,936 KB
testcase_20 AC 508 ms
40,960 KB
testcase_21 AC 509 ms
41,216 KB
testcase_22 AC 503 ms
40,960 KB
testcase_23 AC 2 ms
6,940 KB
testcase_24 AC 2 ms
6,944 KB
testcase_25 AC 2 ms
6,940 KB
testcase_26 AC 2 ms
6,944 KB
testcase_27 AC 2 ms
6,944 KB
testcase_28 AC 1,585 ms
87,552 KB
testcase_29 AC 1,546 ms
87,680 KB
testcase_30 AC 1,475 ms
87,424 KB
testcase_31 AC 1,546 ms
87,552 KB
testcase_32 AC 1,605 ms
87,552 KB
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 # 

#include<atcoder/all>
#include<bits/stdc++.h>
using namespace atcoder;
using namespace std;
#define all(a) a.begin(),a.end()
#define rall(a) a.rbegin(),a.rend()
#define fin(a) return pt(a)
using ll=long long;
using ld=long double;
using v1=vector<ll>;
using v2=vector<v1>;
using v3=vector<v2>;
using v4=vector<v3>;
using pll=pair<ll,ll>;
using mll=map<ll,ll>;
ll inf=1LL<<60;
ld pi=acos(-1);
ld eps=1e-10;
template<class T>using ascending_priority_queue=std::priority_queue<T,vector<T>,greater<T>>;
template<class T>using descending_priority_queue=std::priority_queue<T>;
template<class T>bool chmax(T&a,const T&b){if(a<b){a=b;return 1;}return 0;}
template<class T>bool chmin(T&a,const T&b){if(b<a){a=b;return 1;}return 0;}
template<class V,class T>T max(vector<V>&vec,const T&id){T r=id;for(auto&v:vec)chmax(r,max(v,id));return r;}
template<class V,class T>T min(vector<V>&vec,const T&id){T r=id;for(auto&v:vec)chmin(r,min(v,id));return r;}
template<class T>pll mima(const T&a,const T&b){return {min(a,b),max(a,b)};}
template<class T>T sum(vector<T>&a){return accumulate(all(a),T(0));}
template<class T>T popcnt(T a){return __builtin_popcountll(a);}
istream&operator>>(istream&is,modint1000000007&x){unsigned int t;is>>t;x=t;return is;}
istream&operator>>(istream&is,modint998244353&x){unsigned int t;is>>t;x=t;return is;}
istream&operator>>(istream&is,modint&x){unsigned int t;is>>t;x=t;return is;}
ostream&operator<<(ostream&os,const modint1000000007&x){os<<x.val();return os;}
ostream&operator<<(ostream&os,const modint998244353&x){os<<x.val();return os;}
ostream&operator<<(ostream&os,const modint&x){os<<x.val();return os;}
template<class T1,class T2>istream&operator>>(istream&is,pair<T1,T2>&p){is>>p.first>>p.second;return is;}
template<class T1,class T2>ostream&operator<<(ostream&os,const pair<T1,T2>&p){os<<p.first<<" "<<p.second;return os;}
template<class T>istream&operator>>(istream&is,vector<T>&v){for(T&x:v)is>>x;return is;}
template<class T>ostream&operator<<(ostream&os,const vector<T>&v){for(int i=0;i<(int)v.size();i++){os<<v[i]<<(i+1==(int)v.size()?"":" ");}return os;}
template<class...A>int pt_rest(){cout<<'\n';return 0;}
template<class...A>int pt(){cout<<'\n';return 0;}
template<class T,class...A>int pt_rest(const T&first,const A&...rest){cout<<" "<<first;pt_rest(rest...);return 0;}
template<class T,class...A>int pt(const T&first,const A&...rest){cout<<first;pt_rest(rest...);return 0;}
template<class V,class H>void resize(vector<V>&vec,const H head){vec.resize(head);}
template<class V,class H,class...T>void resize(vector<V>&vec,const H&head,const T...tail){vec.resize(head);for(auto&v:vec)resize(v,tail...);}
template<class V,class T>void fill(V&x,const T&val){x=val;}
template<class V,class T>void fill(vector<V>&vec,const T&val){for(auto&v:vec)fill(v,val);}
template<class H>void vin(istream&is,const int idx,vector<H>&head){is>>head[idx];}
template<class H,class...T>void vin(istream&is,const int idx,vector<H>&head,T&...tail){vin(is>>head[idx],idx,tail...);}
template<class H,class...T>void vin(istream&is,vector<H>&head,T&...tail){for(int i=0;i<(int)head.size();i++)vin(is,i,head,tail...);}
template<class H,class...T>void vin(vector<H>&head,T&...tail){vin(cin,head,tail...);}
template<class H>void sin(istream&is,H&head){is>>head;}
template<class H,class...T>void sin(istream&is,H&head,T&...tail){sin(is>>head,tail...);}
template<class H,class...T>void sin(H&head,T&...tail){sin(cin,head,tail...);}
v1 divisor(ll n){mll m;for(ll i=1;i*i<=n;i++)if(n%i==0){m[i]++;m[n/i]++;}v1 v;for(auto[x,_]:m)v.emplace_back(x);return v;}
mll factor(ll n){mll m;for(ll i=2;i*i<=n;i++)while(n%i==0){m[i]++;n/=i;}if(n>1)m[n]++;return m;}
ll lsqrt(ll x){assert(x>=0);if(x<=1)return x;ll r=sqrt(x)-1;while((r+1)<=x/(r+1))r++;return r;};
using S=ll;
S op(S a,S b){return a+b;}
S e(){return 0;}

int main(void){
  cin.tie(nullptr);
  ios::sync_with_stdio(false);
  
  ll H,W;sin(H,W);
  vector<string>s(H);cin>>s;
  
  auto to_key=[&](ll i,ll j,ll k,ll l){return ((i*W+j)*H+k)*W+l;};
  
  using mint=modint1000000007;
  map<ll,mint>dp;
  
  function<mint(ll,ll,ll,ll)>f=[&](ll i,ll j,ll k,ll l)->mint{
    if(i>k or j>l)return 0;
    if(s[i][j]!=s[k][l])return 0;
    if(i==k and j==l)return 1;
    if(i+1==k and j==l)return 1;
    if(i==k and j+1==l)return 1;
    
    ll key=to_key(i,j,k,l);
    if(dp.count(key))return dp[key];
    
    mint res=0;
    res+=f(i+1,j,k-1,l);
    res+=f(i+1,j,k,l-1);
    res+=f(i,j+1,k-1,l);
    res+=f(i,j+1,k,l-1);
    return dp[key]=res;
  };
  pt(f(0,0,H-1,W-1));
}
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