結果
問題 | No.1885 Flat Permutation |
ユーザー |
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提出日時 | 2022-03-25 22:03:19 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 46 ms / 2,000 ms |
コード長 | 2,084 bytes |
コンパイル時間 | 2,086 ms |
コンパイル使用メモリ | 195,220 KB |
最終ジャッジ日時 | 2025-01-28 12:07:28 |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 43 |
ソースコード
#include <bits/stdc++.h>using namespace std;using ll = long long;using ld = long double;using V = vector<ll>;using VV = vector<V>;using VVV = vector<VV>;using VVVV = vector<VVV>;using VVVVV = vector<VVVV>;using VVVVVV = vector<VVVVV>;using VS = vector<string>;using VB = vector<bool>;using VVB = vector<VB>;using P = pair<ll,ll>;using M = map<ll,ll>;using Q = queue<ll>;using PQ = priority_queue<ll>;using PQG = priority_queue<ll,V,greater<ll>>;using S = set<ll>;using VP = vector<P>;const ll MOD = 1000000007;const ll mod = 998244353;const ll INF = 1LL << 60;#define rep(i,n) for(ll i = 0; i < n; i++)#define rep2(i,s,n) for(ll i = s; i < n; i++)#define per(i,n) for(ll i = n-1; i >= 0; i--)#define per2(i,s,n) for(ll i = n-1; i >= s; i--)#define all(x) (x).begin(),(x).end()#define rall(x) (x).rbegin(),(x).rend()#define fi first#define se second#define pb push_back#define pf push_front#define ppb pop_back#define ppf pop_front#define eb emplace_back#define lb lower_bound#define ub upper_boundtemplate<class T>bool chmin(T&a, const T&b){if(a>b){a=b;return true;}return false;}template<class T>bool chmax(T&a, const T&b){if(a<b){a=b;return true;}return false;}template<class T>void Vin(vector<T>&a){rep(i,(int)a.size())cin>>a[i];}template<class T>void VVin(vector<vector<T>>&a){rep(i,(ll)a.size())Vin(a[i]);}template<class T>void Vout(const vector<T>&a){rep(i,(ll)a.size()-1)cout<<a[i]<<" ";cout<<a.back()<<'\n';}template<class T>void Voutl(const vector<T>&a){rep(i,(ll)a.size())cout<<a[i]<<'\n';}ll power(ll a,ll b,const ll&M){a%=M;ll res=1;while(b>0){if(b&1)res=res*a%M;a=a*a%M;b>>=1;}return res;}const ll H[4] = {0,1,0,-1}, W[4] = {1,0,-1,0};int main() {cin.tie(nullptr);ios::sync_with_stdio(false);ll n, x, y;cin >> n >> x >> y;if(x > y) swap(x, y);if(x != 1) x++;if(y != n) y--;if(y - x < 0) {cout << 0 << '\n';return 0;}V dp(y - x + 3);dp[0] = 1;rep(i, y - x) {dp[i + 1] = (dp[i + 1] + dp[i]) % mod;dp[i + 3] = (dp[i + 3] + dp[i]) % mod;}cout << dp[y - x] << '\n';}