結果

問題 No.2023 Tiling is Fun
ユーザー noya2noya2
提出日時 2022-07-29 21:45:10
言語 C++17
(gcc 13.2.0 + boost 1.83.0)
結果
AC  
実行時間 33 ms / 2,000 ms
コード長 4,371 bytes
コンパイル時間 4,567 ms
コンパイル使用メモリ 264,444 KB
実行使用メモリ 4,892 KB
最終ジャッジ日時 2023-09-26 20:22:33
合計ジャッジ時間 6,016 ms
ジャッジサーバーID
（参考情報） 		judge14 / judge11
このコードへのチャレンジ（β）

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 32 ms
4,732 KB
testcase_01 AC 32 ms
4,704 KB
testcase_02 AC 32 ms
4,668 KB
testcase_03 AC 32 ms
4,696 KB
testcase_04 AC 32 ms
4,892 KB
testcase_05 AC 32 ms
4,732 KB
testcase_06 AC 31 ms
4,652 KB
testcase_07 AC 32 ms
4,856 KB
testcase_08 AC 32 ms
4,732 KB
testcase_09 AC 32 ms
4,648 KB
testcase_10 AC 32 ms
4,736 KB
testcase_11 AC 32 ms
4,856 KB
testcase_12 AC 32 ms
4,696 KB
testcase_13 AC 32 ms
4,728 KB
testcase_14 AC 32 ms
4,672 KB
testcase_15 AC 32 ms
4,696 KB
testcase_16 AC 33 ms
4,716 KB
testcase_17 AC 32 ms
4,708 KB
testcase_18 AC 32 ms
4,668 KB
testcase_19 AC 32 ms
4,732 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<bits/stdc++.h>
#include<atcoder/all>
#define rep(i,n) for (int i = 0; i < int(n); ++i)
#define repp(i,n,m) for (int i = m; i < int(n); ++i)
#define repb(i,n) for (int i = int(n)-1; i >= 0; --i)
#define all(v) v.begin(),v.end()
using namespace std;
using namespace atcoder;
using ll = long long;
using ld = long double;
using P = pair<int, int>;
using PL = pair<long long, long long>;
using pdd = pair<long double, long double>;
using pil = pair<int,ll>;
using pli = pair<ll,int>;
using ppi = pair<P,int>;
using pip = pair<int,P>;
const int INF = 1001001007;
const long long mod1 = 1000000007LL;
const long long mod2 = 998244353LL;
const ll inf = 2e18;
const ld pi = 3.14159265358979323;
const ld eps = 1e-7;
template<typename T>void o(T a);
template<class T>istream &operator>>(istream &is,vector<T> &v){for(auto &e:v)is>>e;return is;}
template<class T>istream &operator>>(istream &is,vector<vector<T>> &v){for(auto &e:v)is>>e;return is;}
template<typename T>bool range(T a,T b,T x){return (a<=x&&x<b);}
template<typename T>bool rrange(T a,T b,T c,T d,T x,T y){return (range(a,c,x)&&range(b,d,y));}
template<typename T>void rev(vector<T> &v){reverse(v.begin(),v.end());}
void revs(string &s) {reverse(s.begin(),s.end());}
template<typename T>void sor(vector<T> &v, int f=0){sort(v.begin(),v.end());if(f!=0) rev(v);}
template<typename T>bool chmin(T &a,const T &b){if(a>b){a=b;return true;}return false;}
template<typename T>bool chmax(T &a,const T &b){if(a<b){a=b;return true;}return false;}
template<typename T>void uniq(vector<T> &v){sor(v);v.erase(unique(v.begin(),v.end()),v.end());}
template<typename T>T cel(T a,T b){return (a+b-1)/b;}
template<typename T1, typename T2>void print(pair<T1,T2> a);
template<typename T>void print(vector<T> v);
template<typename T>void print(vector<vector<T>> v);
void print(){ putchar(' '); }
void print(bool a){ printf("%d", a); }
void print(int a){ printf("%d", a); }
void print(long a){ printf("%ld", a); }
void print(long long a){ printf("%lld", a); }
void print(char a){ printf("%c", a); }
void print(char a[]){ printf("%s", a); }
void print(const char a[]){ printf("%s", a); }
void print(long double a){ printf("%.15Lf", a); }
void print(const string& a){ for(auto&& i : a) print(i); }
template<class T> void print(const T& a){ cout << a; }
int out(){ putchar('\n'); return 0; }
template<class T> int out(const T& t){ print(t); putchar('\n'); return 0; }
template<class Head, class... Tail> int out(const Head& head, const Tail&... tail){ print(head); putchar(' '); out(tail...); return 0; }
void o(){cout<<"!?"<<endl;}
template<typename T>void o(T a){cout<<a<<endl;}
template<typename T1,typename T2>void print(pair<T1,T2> a){print(a.first);print(),print(a.second);}
template<typename T>void print(vector<T> v){for(auto ite=v.begin();ite!=v.end();){print(*ite);if(++ite!=v.end())print();}}
template<typename T>void print(vector<vector<T>> v){for(auto ite=v.begin();ite!=v.end();){print(*ite);if(++ite!=v.end())out();}}
void yes(){out("Yes");}
void no (){out("No");}
void yn (bool t){if(t)yes();else no();}
template<typename T>void dame(bool t, T s){if(!t){out(s);exit(0);}}
vector<int> dx = {0,1,0,-1,1,1,-1,-1};
vector<int> dy = {1,0,-1,0,1,-1,-1,1};
const string ALP = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
const string alp = "abcdefghijklmnopqrstuvwxyz";
const string NUM = "0123456789";

ll gcd(ll a,ll b){return b?gcd(b,a%b):a;}
ll lcm(ll a,ll b){return a/gcd(a,b)*b;}
ll mpow(ll x,ll n,ll m){if(n==0)return 1LL;x%=m;ll a=mpow(x,n/2,m);a=a*a%m;return (n&1)?a*x%m:a;}

struct MINT{
    using mint = modint998244353;
    //using mint = modint1000000007;
    vector<mint> kaijo, kainv;
    int lim = 200000;
    MINT (int _lim = 200000) : lim(_lim), kaijo(_lim+1,1), kainv(_lim+1,1) {
        for (int i = 0; i < lim; i++) kaijo[i+1] = kaijo[i] * (i+1);
        for (int i = 0; i < lim; i++) kainv[i+1] = kainv[i] / (i+1);
    }
    mint factrial(int x){return kaijo[x];}
    mint inv_factorial(int x){return kainv[x];}
    mint ncr(int n, int r){
        if (n < r || r < 0) return mint(0);
        return kaijo[n] * kainv[r] * kainv[n-r];
    }
    mint npr(int n, int r){
        if (n < r || r < 0) return mint(0);
        return kaijo[n] * kainv[n-r];
    }
};


void solve(){
    int n, m; cin >> n >> m;
    MINT M;
    out(M.ncr(n+m-2,n-1).val());
}

int main(){
    int t = 1; //cin >> t;
    while(t--) solve();
}
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