結果

問題 No.2406 Difference of Coordinate Squared
ユーザー akuaakua
提出日時 2023-08-04 22:01:01
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
WA  
実行時間 -
コード長 5,367 bytes
コンパイル時間 3,351 ms
コンパイル使用メモリ 190,632 KB
実行使用メモリ 73,984 KB
最終ジャッジ日時 2024-10-14 19:58:54
合計ジャッジ時間 11,620 ms
ジャッジサーバーID
(参考情報)
judge4 / 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 122 ms
73,856 KB
testcase_01 AC 128 ms
73,984 KB
testcase_02 AC 129 ms
73,984 KB
testcase_03 WA -
testcase_04 AC 128 ms
73,856 KB
testcase_05 AC 128 ms
73,856 KB
testcase_06 AC 121 ms
73,728 KB
testcase_07 AC 124 ms
73,728 KB
testcase_08 AC 121 ms
73,856 KB
testcase_09 AC 122 ms
73,728 KB
testcase_10 AC 118 ms
73,728 KB
testcase_11 AC 121 ms
73,728 KB
testcase_12 AC 122 ms
73,728 KB
testcase_13 AC 120 ms
73,856 KB
testcase_14 AC 126 ms
73,856 KB
testcase_15 AC 117 ms
73,856 KB
testcase_16 AC 118 ms
73,856 KB
testcase_17 AC 115 ms
73,984 KB
testcase_18 WA -
testcase_19 AC 121 ms
73,728 KB
testcase_20 AC 114 ms
73,856 KB
testcase_21 AC 122 ms
73,856 KB
testcase_22 WA -
testcase_23 AC 124 ms
73,856 KB
testcase_24 AC 118 ms
73,728 KB
testcase_25 WA -
testcase_26 AC 124 ms
73,856 KB
testcase_27 WA -
testcase_28 AC 117 ms
73,728 KB
testcase_29 AC 119 ms
73,728 KB
testcase_30 AC 114 ms
73,728 KB
testcase_31 AC 121 ms
73,728 KB
testcase_32 AC 117 ms
73,728 KB
testcase_33 AC 115 ms
73,728 KB
testcase_34 AC 111 ms
73,856 KB
testcase_35 AC 113 ms
73,856 KB
testcase_36 AC 119 ms
73,856 KB
testcase_37 AC 123 ms
73,856 KB
testcase_38 AC 124 ms
73,728 KB
testcase_39 WA -
testcase_40 AC 119 ms
73,856 KB
testcase_41 AC 121 ms
73,856 KB
testcase_42 WA -
testcase_43 AC 115 ms
73,856 KB
testcase_44 AC 117 ms
73,728 KB
testcase_45 AC 114 ms
73,856 KB
testcase_46 AC 122 ms
73,856 KB
testcase_47 AC 115 ms
73,728 KB
testcase_48 WA -
testcase_49 AC 119 ms
73,856 KB
testcase_50 AC 119 ms
73,728 KB
testcase_51 AC 119 ms
73,856 KB
testcase_52 AC 121 ms
73,856 KB
testcase_53 AC 119 ms
73,856 KB
testcase_54 AC 115 ms
73,856 KB
testcase_55 AC 112 ms
73,728 KB
testcase_56 WA -
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 <iostream> // cout, endl, cin
#include <string> // string, to_string, stoi
#include <vector> // vector
#include <algorithm> // min, max, swap, sort, reverse, lower_bound, upper_bound
#include <utility> // pair, make_pair
#include <tuple> // tuple, make_tuple
#include <cstdint> // int64_t, int*_t
#include <cstdio> // printf
#include <map> // map
#include <queue> // queue, priority_queue
#include <set> // set
#include <stack> // stack
#include <deque> // deque #include <unordered_map> // unordered_map #include <unordered_set> // unordered_set #include <bitset> // bitset
#include <cctype> // isupper, islower, isdigit, toupper, tolower
#include <math.h>
#include <iomanip>
#include <functional>
#include<unordered_map>
#include <random>
using namespace std;  
using namespace atcoder;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define repi(i, a, b) for (int i = (int)(a); i < (int)(b); i++)
#define rep2(i, m, n) for (int i = (m); i < (n); ++i)
#define drep2(i, m, n) for (int i = (m)-1; i >= (n); --i)
#define drep(i, n) drep2(i, n, 0)
//#define endl '\n'
#define all(x) (x).begin(),(x).end()
#define arr(x) (x).rbegin(),(x).rend()
typedef long long ll;
typedef unsigned long long ull;
const ll inf=1e18;  
//const int inf=1e7;  
using graph = vector<vector<int> > ;
using P= pair<ll,ll>;  
using vi=vector<int>;
using vvi=vector<vi>;
using vll=vector<ll>; 
using vvll=vector<vll>;
using vp=vector<P>;
using vvp=vector<vp>;
using vd=vector<double>;
using vvd =vector<vd>;
//string T="ABCDEFGHIJKLMNOPQRSTUVWXYZ";
//string S="abcdefghijklmnopqrstuvwxyz";
//g++ main.cpp -std=c++17 -I .  
//cout <<setprecision(20);
//cout << fixed << setprecision(10);
//cin.tie(0); ios::sync_with_stdio(false);

const double PI = acos(-1);
int vx[]={0,1,0,-1,-1,1,1,-1},vy[]={1,0,-1,0,1,1,-1,-1};
void putsYes(bool f){cout << (f?"Yes":"No") << endl;}
void putsYES(bool f){cout << (f?"YES":"NO") << endl;}
void putsFirst(bool f){cout << (f?"First":"Second") << endl;}
void debug(int test){cout << "TEST" << " " << test << endl;}
ll pow_pow(ll x,ll n,ll mod){
    if(n==0) return 1; 
    x%=mod;
    ll res=pow_pow(x*x%mod,n/2,mod);
    if(n&1)res=res*x%mod;
    return res;
}
ll gcdll(ll x,ll y){
    if(y==0)return x;
    return gcdll(y,x%y);
}
//ll INFF=1000100100100100100;
ll lcmll(ll x,ll y){
    ll X=(x/gcdll(x,y)),Y=y;
    return X*Y;
}
template<class T> bool chmin(T& a, T b) {
    if (a > b) {
        a = b;
        return true;
    }
    else return false;
}
template<class T> bool chmax(T& a, T b) {
    if (a < b) {
        a = b;
        return true;
    }
    else return false;
}
struct edge{
  int to; ll cost;ll canv;
  edge(int to,ll cost,ll canv) : to(to),cost(cost),canv(canv){}
};
using ve=vector<edge>;
using vve=vector<ve>;
using mint = modint998244353;
using vm=vector<mint>;
using vvm=vector<vm>;
const int mod = 998244353;
//int mod = 1e9+7;
constexpr ll MAX = 3000100;
ll fact[MAX],finv[MAX],inv[MAX];
void initcomb(){
  fact[0]=fact[1]=1;
  finv[0]=finv[1]=1;
  inv[1]=1;
  for(int i=2;i<MAX;i++){
    fact[i]=fact[i-1]*i%mod;
    inv[i]=mod-inv[mod%i]*(mod/i)%mod;
    finv[i]=finv[i-1]*inv[i]%mod;
  }
}
ll comb(ll n,ll k){
  if(n<k) return 0;
  if(n<0||k<0) return 0;
  return fact[n]*(finv[k]*finv[n-k]%mod)%mod;
}
struct UnionFind { vector<int> par, siz; UnionFind(int n) : par(n, -1) , siz(n, 1) { } int root(int x) { if (par[x] == -1) return x;
        else return par[x] = root(par[x]);
    }
    bool issame(int x, int y) {
        return root(x) == root(y);
    }
    bool unite(int x, int y) {
        x = root(x), y = root(y);
        if (x == y) return false; 
        if (siz[x] < siz[y]) swap(x, y);
        par[y] = x;
        siz[x] += siz[y];
        return true;
    }
    int size(int x) {
        return siz[root(x)];
    }
};
vll anss;
void solve(int test){
  initcomb();
  int n; ll m; cin >> n >> m;
  if(m==0){
    mint ans=0;
    for(ll x=-n; x<=n; x++){
      mint now=1;
      {
        ll i=n+x;
        ll j=n-x;
        if(i<0 || j<0)continue;
        if(i%2 || j%2)continue;
        i/=2;
        j/=2;
        now*=comb(n,i);
      }
      {
        {
          ll y=x;
          ll i=n+y;
          ll j=n-y;
          if(i<0 || j<0)continue;
          if(i%2 || j%2)continue;
          i/=2;
          j/=2;
          now*=comb(n,i);
        }
        if(x!=0){
          now*=2;
        }
      }
      ans+=now;
    }
    ll inv4=(mint(1)/4).val();
    ans*=pow_pow(inv4,n,mod);
    cout << ans.val() << endl;
    return;
  }
  vll vs;
  for(ll i=1; i*i<=abs(m); i++)if(m%i==0){
    vs.push_back(i);
    vs.push_back(-i);

    vs.push_back(m/i);
    vs.push_back(-(m/i));
  }
  sort(all(vs));
  vs.erase(unique(all(vs)),vs.end());
  mint ans=0;
  ll inv4=(mint(1)/4).val();
  for(auto v:vs){
    mint now=1;
    ll x=v,y=m/v;
    {
      ll i=n+x;
      ll j=n-x;
      if(i<0 || j<0)continue;
      if(i%2 || j%2)continue;
      i/=2;
      j/=2;
      now*=comb(n,i);
    }
    {
      ll i=n+y;
      ll j=n-y;
      if(i<0 || j<0)continue;
      if(i%2 || j%2)continue;
      i/=2;
      j/=2;
      now*=comb(n,i);
    }
    ans+=now;
  }
  ans*=pow_pow(inv4,n,mod);
  cout << ans.val() << endl;
}
//g++ main.cpp -std=c++17 -I .
int main(){cin.tie(0);ios::sync_with_stdio(false);
 int t=1;//cin >>t;
 rep(test,t)solve(test);
 for(auto ans:anss)cout << ans << endl;
}
0