結果
問題 | No.2105 Avoid MeX |
ユーザー | noya2 |
提出日時 | 2022-10-21 23:24:23 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 1,184 ms / 2,000 ms |
コード長 | 4,223 bytes |
コンパイル時間 | 4,530 ms |
コンパイル使用メモリ | 272,004 KB |
実行使用メモリ | 19,328 KB |
最終ジャッジ日時 | 2024-07-01 07:37:25 |
合計ジャッジ時間 | 13,046 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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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
6,816 KB |
testcase_01 | AC | 2 ms
6,940 KB |
testcase_02 | AC | 2 ms
6,944 KB |
testcase_03 | AC | 2 ms
6,944 KB |
testcase_04 | AC | 607 ms
11,520 KB |
testcase_05 | AC | 2 ms
6,944 KB |
testcase_06 | AC | 247 ms
6,944 KB |
testcase_07 | AC | 435 ms
9,216 KB |
testcase_08 | AC | 109 ms
6,944 KB |
testcase_09 | AC | 720 ms
13,056 KB |
testcase_10 | AC | 2 ms
6,944 KB |
testcase_11 | AC | 2 ms
6,940 KB |
testcase_12 | AC | 105 ms
6,944 KB |
testcase_13 | AC | 2 ms
6,940 KB |
testcase_14 | AC | 329 ms
7,808 KB |
testcase_15 | AC | 418 ms
9,088 KB |
testcase_16 | AC | 2 ms
6,940 KB |
testcase_17 | AC | 2 ms
6,944 KB |
testcase_18 | AC | 3 ms
6,944 KB |
testcase_19 | AC | 1,184 ms
19,200 KB |
testcase_20 | AC | 1,175 ms
19,072 KB |
testcase_21 | AC | 1,177 ms
19,200 KB |
testcase_22 | AC | 1,181 ms
19,328 KB |
testcase_23 | AC | 2 ms
6,940 KB |
testcase_24 | AC | 2 ms
6,940 KB |
ソースコード
#line 1 "c.cpp" #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 ull = unsigned 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>; template<class T>istream &operator>>(istream &is,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 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); } void print(unsigned int a){ printf("%u", a); } void print(unsigned long long a) { printf("%llu", a); } 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; } 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();} void fast_io(){cin.tie(0); ios::sync_with_stdio(0); cout<<fixed<<setprecision(20);} void o(){out("!?");} namespace noya2{ const int INF = 1001001007; const long long mod1 = 998244353; const long long mod2 = 1000000007; const long long inf = 2e18; const long double pi = 3.14159265358979323; const long double eps = 1e-7; const vector<int> dx = {0,1,0,-1,1,1,-1,-1}; const vector<int> dy = {1,0,-1,0,1,-1,-1,1}; const string ALP = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; const string alp = "abcdefghijklmnopqrstuvwxyz"; const string NUM = "0123456789"; } // namespace noya2 using namespace noya2; using mint = modint998244353; void out(mint a){out(a.val());} void out(vector<mint> a){vector<ll> b(a.size()); rep(i,a.size()) b[i] = a[i].val(); out(b);} void out(vector<vector<mint>> a){for (auto v : a) out(v);} istream &operator>>(istream &is,vector<mint> &v){for(auto &e:v){ll _x;is>>_x;e=_x;}return is;} void solve(){ int c, x; cin >> c >> x; if (x == 0){ out(mint(c+1).inv()); return ; } if (c >= x){ mint p = x; out(p/(p+1)); return ; } vector<vector<mint>> dp(x-c+1,vector<mint>(x+1,0)); dp[0][0] = 1; rep(i,x-c) repp(j,x+1,1){ dp[i+1][j] += dp[i][j] * mint(j) / mint(c+i+1); dp[i+1][j] += dp[i][j-1] * mint(c+i+1-(j-1)) / mint(c+i+1); } mint ans = 0; rep(i,x+1) ans += mint(x-i) / mint(x-i+1) * dp[x-c][i]; out(ans); } int main(){ fast_io(); int t = 1; //cin >> t; while(t--) solve(); }