結果
| 問題 |
No.1062 素敵なスコア
|
| コンテスト | |
| ユーザー |
Enjapma_kyopro
|
| 提出日時 | 2020-05-03 15:47:51 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
RE
(最新)
AC
(最初)
|
| 実行時間 | - |
| コード長 | 4,694 bytes |
| コンパイル時間 | 2,056 ms |
| コンパイル使用メモリ | 176,012 KB |
| 実行使用メモリ | 22,400 KB |
| 最終ジャッジ日時 | 2024-10-02 09:08:34 |
| 合計ジャッジ時間 | 10,303 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 16 RE * 16 |
ソースコード
#include <bits/stdc++.h>
#include <unistd.h>
#include <sys/time.h>
#include <stdlib.h>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> P;
typedef pair<P, ll> T;
long long int INF = 2e18;
const ll fact_table = 1200008;
double Pi = 3.1415926535897932384626;
priority_queue <ll> pql;
priority_queue <P> pqp;
priority_queue <P> bag;
//big priority queue
priority_queue <ll,vector<ll>,greater<ll> > pqls;
priority_queue <P,vector<P>,greater<P> > pqps;
//small priority queue
//top pop
ll dx[8]={1,0,-1,0,1,1,-1,-1};
ll dy[8]={0,1,0,-1,1,-1,-1,1};
char dir[] = "DRUL";
//↓,→,↑,←
#define endl "\n"
#ifdef ENJAPMA
#undef endl
#endif
#define p(x) cout<<x<<endl;
#define el cout<<endl;
#define pe(x) cout<<x<<" ";
#define ps(x) cout<<fixed<<setprecision(25)<<x<<endl;
#define pu(x) cout<<(x);
#define pb push_back
#define lb lower_bound
#define ub upper_bound
#define CLEAR(a) a = decltype(a)();
#define pc(x) cout << x << ",";
const ll mod = 998244353ll;
// const ll mod = 1000000007ll;
ll mypow(ll number1,ll number2, ll mod){
if(number2 == 0){
return 1ll;
}else{
ll number3 = mypow(number1,number2 / 2, mod);
number3 *= number3;
number3 %= mod;
if(number2%2==1){
number3 *= number1;
number3 %= mod;
}
return number3;
}
}
void YES(bool condition){
if(condition){
p("YES");
}else{
p("NO");
}
return;
}
void Yes(bool condition){
if(condition){
p("Yes");
}else{
p("No");
}
return;
}
namespace NTT {
void DFT(ll m, ll root, vector<ll> &a, bool rev = false) {
ll N = a.size(), h = 0;
for (ll i = 0; 1 << i < N; i++) h++;
for (ll i = 0; i < N; i++) {
ll j = 0;
for (ll k = 0; k < h; k++)
j |= (i >> k & 1) << (h - 1 - k);
if (i < j) swap(a[i], a[j]);
}
for (ll i = 1; i < N; i *= 2) {
ll base = mypow(root, (m - 1) / i / 2, m);
if (rev) base = mypow(base, m - 2, m);
ll w = 1;
for (ll j = 0; j < i; j++) {
for (ll k = 0; k < N; k += i*2) {
ll s = a[j+k], t = a[j+k+i] * w % m;
a[j+k+0] = (s + t) % m;
a[j+k+i] = (s - t + m) % m;
}
w = w * base % m;
}
}
if (rev) {
ll tmp = mypow(N, m-2, m);
for(ll &v : a) v = v * tmp % m;
}
}
//(1012924417, 5), (924844033, 5)
vector<ll> conv(ll _mod, ll root, const vector<ll> &a, const vector<ll> &b) {
ll s = 1, t = a.size() + b.size() - 1;
while(s < t) s *= 2;
vector<ll> F(s), G(s);
for(ll i = 0; i < (ll)a.size(); i++) F[i] = a[i];
for(ll i = 0; i < (ll)b.size(); i++) G[i] = b[i];
DFT(_mod, root, F); DFT(_mod, root, G);
for(ll i = 0; i < s; i++) F[i] = (ll)F[i] * G[i] % _mod;
DFT(_mod, root, F, true);
return F;
}
};
ll fact[fact_table + 5],rfact[fact_table + 5];
void c3_init(){
fact[0] = rfact[0] = 1;
for(ll i=1; i<=fact_table; i++){
fact[i] = (fact[i-1]*i) % mod;
}
rfact[fact_table] = mypow(fact[fact_table],mod - 2, mod);
for(ll i=fact_table; i>=1; i--){
rfact[i-1] = rfact[i] * i;
rfact[i-1] %= mod;
}
return;}
ll c3(ll n,ll r){
assert(n >= r);
assert(n >= 0);
assert(r >= 0);
return (((fact[n] * rfact[r]) % mod ) * rfact[n-r]) % mod;}
bool multicase = false;
ll n,m,num,a,b,c,d,e,q;
ll x[100005], y[100005], z[100005];
ll k;
vector<ll> g;
vector<ll> h;
void solve(){
ll n;
cin >> n >> a >> b;
assert(1 <= n && n <= 2000);
assert(1 <= a && a <= n - 1);
assert(1 <= b && b <= n - 1);
if(a > b)swap(a, b);
ll A = a, B = b - a, C = n - b;
ll base = (((fact[A]) % mod) * fact[C]) % mod;
ll ans = 0;
for(ll i=0;i<A;i++){
ll res = (rfact[i] * rfact[A - i - 1]) % mod;
g.pb(res);
}
for(ll i=0;i<C;i++){
ll res = (rfact[i] * rfact[C - i - 1]) % mod;
h.pb(res);
}
auto restable = NTT::conv(mod, 3ll, g, h);
for(ll i=0;i<restable.size();i++){
ll tmp = (((fact[i] * fact[n - 2 - i]) % mod) * restable[i]) % mod;
ans += tmp;
ans %= mod;
}
ans *= base * 2;
ans %= mod;
ll res = (A * A + B * B + C * C) % mod;
res *= fact[n-1];
res %= mod;
ans += res;
ans %= mod;
p(ans);
}
int main(){
// init();
c3_init();
ios::sync_with_stdio(false);
cin.tie(nullptr);
ll q, testcase = 1;
if(multicase){
cin >> q;
}else{
q = 1;
}
while(q--){
// pu("Case ");pu("#");pu(testcase);pu(": ");
solve();
testcase++;
}
// solve();
return 0;
}
Enjapma_kyopro