結果
問題 | No.1239 Multiplication -2 |
ユーザー | mugen_1337 |
提出日時 | 2020-09-25 22:59:03 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
RE
|
実行時間 | - |
コード長 | 6,035 bytes |
コンパイル時間 | 2,396 ms |
コンパイル使用メモリ | 217,780 KB |
実行使用メモリ | 6,948 KB |
最終ジャッジ日時 | 2024-06-28 07:13:21 |
合計ジャッジ時間 | 4,961 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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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
6,812 KB |
testcase_01 | AC | 2 ms
6,940 KB |
testcase_02 | AC | 2 ms
6,940 KB |
testcase_03 | AC | 3 ms
6,944 KB |
testcase_04 | AC | 3 ms
6,940 KB |
testcase_05 | AC | 2 ms
6,940 KB |
testcase_06 | AC | 2 ms
6,940 KB |
testcase_07 | AC | 2 ms
6,940 KB |
testcase_08 | AC | 2 ms
6,940 KB |
testcase_09 | AC | 2 ms
6,940 KB |
testcase_10 | AC | 2 ms
6,940 KB |
testcase_11 | AC | 2 ms
6,944 KB |
testcase_12 | AC | 2 ms
6,940 KB |
testcase_13 | AC | 2 ms
6,940 KB |
testcase_14 | RE | - |
testcase_15 | AC | 16 ms
6,944 KB |
testcase_16 | AC | 26 ms
6,940 KB |
testcase_17 | RE | - |
testcase_18 | AC | 123 ms
6,944 KB |
testcase_19 | AC | 60 ms
6,940 KB |
testcase_20 | RE | - |
testcase_21 | AC | 60 ms
6,940 KB |
testcase_22 | AC | 46 ms
6,944 KB |
testcase_23 | AC | 46 ms
6,940 KB |
testcase_24 | AC | 36 ms
6,944 KB |
testcase_25 | AC | 9 ms
6,940 KB |
testcase_26 | AC | 46 ms
6,940 KB |
testcase_27 | AC | 20 ms
6,940 KB |
testcase_28 | AC | 58 ms
6,944 KB |
testcase_29 | AC | 63 ms
6,940 KB |
testcase_30 | AC | 25 ms
6,940 KB |
testcase_31 | AC | 36 ms
6,944 KB |
testcase_32 | AC | 60 ms
6,940 KB |
testcase_33 | AC | 42 ms
6,944 KB |
testcase_34 | AC | 40 ms
6,940 KB |
testcase_35 | AC | 20 ms
6,940 KB |
testcase_36 | AC | 18 ms
6,940 KB |
ソースコード
#include<bits/stdc++.h> using namespace std; #define ALL(x) x.begin(),x.end() #define rep(i,n) for(int i=0;i<(n);i++) #define debug(v) cout<<#v<<":";for(auto x:v){cout<<x<<' ';}cout<<endl; #define mod 998244353 using ll=long long; const int INF=1000000000; const ll LINF=1001002003004005006ll; int dx[]={1,0,-1,0},dy[]={0,1,0,-1}; // ll gcd(ll a,ll b){return b?gcd(b,a%b):a;} template<class T>bool chmax(T &a,const T &b){if(a<b){a=b;return true;}return false;} template<class T>bool chmin(T &a,const T &b){if(b<a){a=b;return true;}return false;} struct IOSetup{ IOSetup(){ cin.tie(0); ios::sync_with_stdio(0); cout<<fixed<<setprecision(12); } } iosetup; template<typename T1,typename T2> ostream &operator<<(ostream &os,const pair<T1,T2>&p){ os<<p.first<<" "<<p.second; return os; } template<typename 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<typename T1,typename T2> istream &operator>>(istream &is,pair<T1,T2>&p){ is>>p.first>>p.second; return is; } template<typename T> istream &operator>>(istream &is,vector<T>&v){ for(T &x:v)is>>x; return is; } template<ll Mod> struct ModInt{ long long x; ModInt():x(0){} ModInt(long long y):x(y>=0?y%Mod:(Mod-(-y)%Mod)%Mod){} ModInt &operator+=(const ModInt &p){ if((x+=p.x)>=Mod) x-=Mod; return *this; } ModInt &operator-=(const ModInt &p){ if((x+=Mod-p.x)>=Mod)x-=Mod; return *this; } ModInt &operator*=(const ModInt &p){ x=(int)(1ll*x*p.x%Mod); return *this; } ModInt &operator/=(const ModInt &p){ (*this)*=p.inverse(); return *this; } ModInt operator-()const{return ModInt(-x);} ModInt operator+(const ModInt &p)const{return ModInt(*this)+=p;} ModInt operator-(const ModInt &p)const{return ModInt(*this)-=p;} ModInt operator*(const ModInt &p)const{return ModInt(*this)*=p;} ModInt operator/(const ModInt &p)const{return ModInt(*this)/=p;} ModInt operator==(const ModInt &p)const{return x==p.x;} ModInt operator!=(const ModInt &p)const{return x!=p.x;} ModInt inverse()const{ int a=x,b=Mod,u=1,v=0,t; while(b>0){ t=a/b; swap(a-=t*b,b);swap(u-=t*v,v); } return ModInt(u); } ModInt pow(long long n)const{ ModInt ret(1),mul(x); while(n>0){ if(n&1) ret*=mul; mul*=mul;n>>=1; } return ret; } friend ostream &operator<<(ostream &os,const ModInt &p){return os<<p.x;} friend istream &operator>>(istream &is,ModInt &a){long long t;is>>t;a=ModInt<Mod>(t);return (is);} static int get_mod(){return Mod;} }; using mint=ModInt<mod>; template<int MAX> struct comcalc{ vector<mint> fact,finv,inv; comcalc():fact(MAX),finv(MAX),inv(MAX){ fact[0]=mint(1),fact[1]=mint(1),finv[0]=mint(1),finv[1]=mint(1),inv[1]=mint(1); for(int i=2;i<MAX;i++){ fact[i]=fact[i-1]*mint(i); inv[i]=mint(0)-inv[mod%i]*(mint(mod/i)); finv[i]=finv[i-1]*inv[i]; } } mint com(int n,int k){ if(n<k) return mint(0); if(n<0 or k<0) return mint(0); return fact[n]*(finv[k]*finv[n-k]); } mint fac(int n){ return fact[n]; } // 重複組み合わせ:n種類の物から重複を許し,k個選ぶ mint nHk(int n,int k){ return com(n+k-1,k); } // 玉n区別,箱k区別,各箱1個以上O(k) mint F12_dis_dis_one(int n,int k){ if(n<k)return mint(0); mint ret=0; for(int i=0;i<=k;i++){ mint add=com(k,i)*(mint(i).pow(n)); if((k-i)%2) ret-=add; else ret+=add; } return ret; } /* sum combination(n+x, x), x=l to r https://www.wolframalpha.com/input/?i=sum+combination%28n%2Bx+%2Cx%29%2C+x%3Dl+to+r&lang=ja check n+x < [COM_PRECALC_MAX] */ mint sum_of_comb(int n,int l,int r){ if(l>r)return mint(0); mint ret=mint(r+1)*com(n+r+1,r+1)-mint(l)*com(l+n,l); ret/=mint(n+1); return ret; } }; const int MAX=4010000; using cominit=comcalc<MAX>; const ll mod2=924844033; using mint2=ModInt<mod2>; using P=pair<ll,ll>; int n; // zero-sum ranges mint solve(vector<int> v){ mint ret=0; map<P,mint> mp; mint x=1; mint2 x2=1; mint y=mint(-2).inverse(); mint2 y2=mint2(-2).inverse(); mp[{1,1}]+=1; rep(i,(int)v.size()){ x*=mint(v[i]);x2*=mint2(v[i]); mint need=x*y;mint2 need2=x2*y2; mint i2=mint(2).pow(i+1); ret+=mp[{need.x,need2.x}]/i2; mp[{x.x,x2.x}]+=i2; } return ret; } signed main(){ cin>>n; vector<int> a(n); cin>>a; mint res=0; for(int i=1;i<n-1;i++)if(abs(a[i])==2){ vector<int> v; for(int j=i-1;j>0;j--){ if(abs(a[j])!=1) break; v.push_back(a[j]); } reverse(ALL(v)); v.push_back(a[i]); for(int j=i+1;j<n-1;j++){ if(abs(a[j])!=1) break; v.push_back(a[j]); } auto tmp=solve(v)*mint(2).pow(n-2); // cout<<tmp<<endl; res+=tmp; } bool f=true; { int x=1; rep(i,n){ x*=a[i]; if(x==-2){ if(i==n-1) res+=1,f=false; else{ res+=mint(2).pow(n-2-i); } } if(abs(x)==0 or abs(x)>2) break; } } if(f){ reverse(ALL(a)); int x=1; rep(i,n){ x*=a[i]; if(x==-2){ if(i==n-1) res+=1,f=false; else{ res+=mint(2).pow(n-2-i); } } if(abs(x)==0 or abs(x)>2) break; } } assert(f); // cout<<res<<endl; res/=mint(2).pow(n-1); cout<<res<<endl; return 0; }