結果
| 問題 |
No.1068 #いろいろな色 / Red and Blue and more various colors (Hard)
|
| コンテスト | |
| ユーザー |
mugen_1337
|
| 提出日時 | 2020-05-30 00:27:17 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 2,861 bytes |
| コンパイル時間 | 2,359 ms |
| コンパイル使用メモリ | 195,420 KB |
| 最終ジャッジ日時 | 2025-01-10 18:46:01 |
|
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 1 WA * 10 TLE * 18 |
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 INF 1000000000
#define mod 998244353
using ll=long long;
const ll LINF=1001002003004005006ll;
int dx[]={1,0,-1,0};
int 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;}
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>;
signed main(){
cin.tie(0);
ios::sync_with_stdio(0);
int n,q;cin>>n>>q;
vector<mint> a(n);
mint sum=0;
rep(i,n){
cin>>a[i];
a[i]-=1;
sum+=a[i];
}
while(q--){
int b;cin>>b;
int d=n-b-1;
if(b==n){
cout<<1<<endl;
continue;
}
if(d==0){
cout<<sum<<endl;
continue;
}
mint ans=0;
mint s=0;
mint m=1;
rep(i,d)m*=a[n-1-i];
for(int i=n-1;true;i--){
ans+=s*m;
s+=a[i];
m*=a[i].inverse();
if(i-d<0) break;
m*=a[i-d];
}
cout<<ans<<endl;
}
return 0;
}
mugen_1337