結果
| 問題 |
No.1677 mæx
|
| コンテスト | |
| ユーザー |
sak
|
| 提出日時 | 2021-08-05 14:04:20 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 31 ms / 2,000 ms |
| コード長 | 4,133 bytes |
| コンパイル時間 | 2,725 ms |
| コンパイル使用メモリ | 213,740 KB |
| 最終ジャッジ日時 | 2025-01-23 14:14:57 |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 18 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> p_ll;
template<class T>
void debug(T itr1, T itr2) { auto now = itr1; while(now<itr2) { cout << *now << " "; now++; } cout << endl; }
#define repr(i,from,to) for (ll i=(ll)from; i<(ll)to; i++)
#define all(vec) vec.begin(), vec.end()
#define rep(i,N) repr(i,0,N)
#define per(i,N) for (int i=(int)N-1; i>=0; i--)
const ll LLINF = pow(2,61)-1;
const int INF = pow(2,30)-1;
ll gcd(ll a, ll b) { if (a<b) swap(a,b); return b==0 ? a : gcd(b, a%b); }
ll lcm(ll a, ll b) { return a/gcd(a,b)*b; }
// ----------------------------------------------------------------------
// ----------------------------------------------------------------------
const ll MOD = 998244353;
struct MLL {
ll x, mod;
MLL(ll y=0, ll m=MOD) { x = (y%m+m)%m; mod = m; }
MLL &operator+= (const MLL &p) { x = (x+p.x)%mod; return *this; }
MLL &operator-= (const MLL &p) { x = (x-p.x+mod)%mod; return *this; }
MLL &operator*= (const MLL &p) { x = (x*p.x)%mod; return *this; }
MLL &operator/= (const MLL &p) { x = (x*p.inv().x)%mod; return *this; }
MLL operator+ (const MLL &p) const { return MLL(*this)+=p; }
MLL operator- (const MLL &p) const { return MLL(*this)-=p; }
MLL operator* (const MLL &p) const { return MLL(*this)*=p; }
MLL operator/ (const MLL &p) const { return MLL(*this)/=p; }
bool operator== (const MLL &p) const { return x==p.x; }
bool operator!= (const MLL &p) const { return x!=p.x; }
bool operator< (const MLL &p) const { return x< p.x; }
bool operator<= (const MLL &p) const { return x<=p.x; }
bool operator> (const MLL &p) const { return x> p.x; }
bool operator>= (const MLL &p) const { return x>=p.x; }
MLL pow(MLL n) const { MLL result(1), p(x); ll tn = n.x; while(tn){ if (tn&1) result*=p; p*=p; tn>>=1; } return result; }
MLL inv() const { return pow(MOD-2); }
};
MLL operator+ (ll x, MLL p) { return (MLL)x+p; }
MLL operator- (ll x, MLL p) { return (MLL)x-p; }
MLL operator* (ll x, MLL p) { return (MLL)x*p; }
MLL operator/ (ll x, MLL p) { return (MLL)x/p; }
vector<MLL> fac;
void c_fac(ll x=pow(10,7)+10) { fac.resize(x); rep(i,x) fac[i] = i ? fac[i-1]*i : 1; }
MLL nck(MLL n, MLL k) { return fac[n.x]/(fac[k.x]*fac[(n-k).x]); };
ostream &operator<< (ostream &ost, const MLL &p) { return ost << p.x; }
istream &operator>> (istream &ist, MLL &p) { return ist >> p.x; }
// ----------------------------------------------------------------------
// ----------------------------------------------------------------------
vector<MLL> cmax(vector<MLL> v1, vector<MLL> v2) {
return {
v1[0]*v2[0],
v1[0]*v2[1] + v1[1]*v2[0] + v1[1]*v2[1],
v1[0]*v2[2] + v1[1]*v2[2] + v1[2]*v2[0] + v1[2]*v2[1] + v1[2]*v2[2],
};
}
vector<MLL> cmex(vector<MLL> v1, vector<MLL> v2) {
return {
v1[1]*v2[1] + v1[1]*v2[2] + v1[2]*v2[1] + v1[2]*v2[2],
v1[0]*v2[0] + v1[0]*v2[2] + v1[2]*v2[0],
v1[0]*v2[1] + v1[1]*v2[0]
};
}
vector<MLL> cm_x(vector<MLL> v1, vector<MLL> v2) {
vector<MLL> ma = cmax(v1, v2), me = cmex(v1, v2);
return {
ma[0] + me[0],
ma[1] + me[1],
ma[2] + me[2]
};
}
int main() {
string S; cin >> S;
ll K; cin >> K;
assert(1<=S.size() && S.size()<=2*pow(10,5));
assert(K==0||K==1||K==2);
stack<string> op;
stack<vector<MLL>> dp;
for (int i=0; i<S.size();) {
if (S[i]==',') { i++; continue; }
else if (S[i]=='m') { op.push(S.substr(i,3)); i+=4; }
else if (S[i]==')') {
vector<MLL> n1 = dp.top(); dp.pop();
vector<MLL> n2 = dp.top(); dp.pop();
string o = op.top(); op.pop();
if (o=="max") dp.push(cmax(n1,n2));
else if (o=="mex") dp.push(cmex(n1,n2));
else if (o=="m?x") dp.push(cm_x(n1,n2));
else assert(false);
i++;
}
else {
if (S[i]=='?') dp.push({1,1,1});
else if (S[i]=='0') dp.push({1,0,0});
else if (S[i]=='1') dp.push({0,1,0});
else if (S[i]=='2') dp.push({0,0,1});
else assert(false);
i++;
}
}
assert(op.size()==0 && dp.size()==1);
MLL result = dp.top()[K];
cout << result << endl;
return 0;
}
sak