結果

問題 No.1646 Avoid Palindrome
ユーザー tada721tada721
提出日時 2021-08-13 21:39:21
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
WA  
(最新)
AC  
(最初)
実行時間 -
コード長 8,359 bytes
コンパイル時間 1,578 ms
コンパイル使用メモリ 99,308 KB
実行使用メモリ 355,200 KB
最終ジャッジ日時 2024-11-08 15:02:17
合計ジャッジ時間 44,572 ms
ジャッジサーバーID
（参考情報） 		judge4 / judge1
このコードへのチャレンジ
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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
5,248 KB
testcase_01 AC 2 ms
5,248 KB
testcase_02 AC 2 ms
5,248 KB
testcase_03 AC 3 ms
5,248 KB
testcase_04 AC 1,014 ms
281,088 KB
testcase_05 AC 1,014 ms
280,064 KB
testcase_06 AC 979 ms
270,464 KB
testcase_07 AC 1,004 ms
280,576 KB
testcase_08 AC 1,013 ms
282,752 KB
testcase_09 AC 948 ms
268,416 KB
testcase_10 AC 980 ms
274,944 KB
testcase_11 AC 954 ms
267,904 KB
testcase_12 AC 997 ms
280,320 KB
testcase_13 AC 1,009 ms
283,264 KB
testcase_14 AC 1,691 ms
328,320 KB
testcase_15 AC 1,724 ms
334,848 KB
testcase_16 AC 1,682 ms
326,272 KB
testcase_17 AC 1,765 ms
340,608 KB
testcase_18 AC 1,715 ms
331,520 KB
testcase_19 AC 1,690 ms
329,856 KB
testcase_20 AC 1,716 ms
332,544 KB
testcase_21 AC 1,757 ms
340,224 KB
testcase_22 AC 1,698 ms
328,704 KB
testcase_23 AC 1,776 ms
342,016 KB
testcase_24 AC 1,873 ms
355,072 KB
testcase_25 AC 1,875 ms
355,072 KB
testcase_26 AC 1,829 ms
354,944 KB
testcase_27 AC 1,837 ms
355,072 KB
testcase_28 AC 1,842 ms
355,072 KB
testcase_29 AC 521 ms
234,880 KB
testcase_30 AC 520 ms
234,624 KB
testcase_31 AC 517 ms
233,984 KB
testcase_32 AC 521 ms
234,112 KB
testcase_33 AC 521 ms
234,240 KB
testcase_34 AC 1,834 ms
355,200 KB
testcase_35 AC 2 ms
5,248 KB
testcase_36 AC 2 ms
5,248 KB
testcase_37 AC 2 ms
5,248 KB
testcase_38 AC 2 ms
5,248 KB
testcase_39 AC 2 ms
5,248 KB
testcase_40 AC 2 ms
5,248 KB
testcase_41 AC 2 ms
5,248 KB
testcase_42 AC 2 ms
5,248 KB
testcase_43 WA -
権限があれば一括ダウンロードができます
コンパイルメッセージ
main.cpp: In function 'long long int keta(long long int)':
main.cpp:42:1: warning: control reaches end of non-void function [-Wreturn-type]
   42 | }
      | ^
main.cpp: In function 'long long int gcd(long long int, long long int)':
main.cpp:56:1: warning: control reaches end of non-void function [-Wreturn-type]
   56 | }
      | ^
main.cpp: In function 'long long int lcm(long long int, long long int)':
main.cpp:69:1: warning: control reaches end of non-void function [-Wreturn-type]
   69 | }
      | ^

ソースコード

diff # 

#include<iostream>
#include<algorithm>
#include<cmath>
#include<map>
#include<stdio.h>
#include<vector>
#include<queue>
#include<math.h>
#include<deque>
#include<set>
#include<tuple>
#include<string>
using namespace std;
#define ll long long
#define int long long
#define double long double
#define rep(s,i,n) for(int i=s;i<n;i++)
#define c(n) cout<<n<<endl;
#define ic(n) int n;cin>>n;
#define sc(s) string s;cin>>s;
#define mod 998244353
#define inf 1000000000000000007
#define f first
#define s second
#define mini(c,a,b) *min_element(c+a,c+b)
#define maxi(c,a,b) *max_element(c+a,c+b)
#define pi 3.141592653589793238462643383279
#define e_ 2.718281828459045235360287471352
#define P pair<int,int>
#define upp(a,n,x) upper_bound(a,a+n,x)-a;
#define low(a,n,x) lower_bound(a,a+n,x)-a;
#define UF UnionFind 
#define pb push_back
//printf("%.12Lf\n",);
int keta(int x) {
	rep(0, i, 30) {
		if (x < 10) {
			return i + 1;
		}
		x = x / 10;
	}
}
int gcd(int x, int y) {
	if (x == 0 || y == 0)return x + y;
	int aa = x, bb = y;
	rep(0, i, 1000) {
		aa = aa % bb;
		if (aa == 0) {
			return bb;
		}
		bb = bb % aa;
		if (bb == 0) {
			return aa;
		}
	}
}
int lcm(int x, int y) {
	int aa = x, bb = y;
	rep(0, i, 1000) {
		aa = aa % bb;
		if (aa == 0) {
			return x / bb * y;
		}
		bb = bb % aa;
		if (bb == 0) {
			return x / aa * y;
		}
	}
}
bool prime(int x) {
	if (x == 1)return false;
	rep(2, i, sqrt(x) + 1) {
		if (x % i == 0 && x != i) {
			return false;
		}
	}
	return true;
}
int max(int a, int b) {
	if (a >= b)return a;
	else return b;
}
string maxst(string s, string t) {
	int n = s.size();
	int m = t.size();
	if (n > m)return s;
	else if (n < m)return t;
	else {
		rep(0, i, n) {
			if (s[i] > t[i])return s;
			if (s[i] < t[i])return t;
		}
		return s;
	}
}
int min(int a, int b) {
	if (a >= b)return b;
	else return a;
}
int yakuwa(int n) {
	int sum = 0;
	rep(1, i, sqrt(n + 1)) {
		if (n % i == 0)sum += i + n / i;
		if (i * i == n)sum -= i;
	}
	return sum;
}
int poow(int n,int m){
	int pro=1;
	int nn=n;
	while(m){
		if(m%2==1)pro=pro*nn%mod;
		m=m/2;
		nn=nn*nn%mod;
	}
	return pro;
}
int poow2(int n,int m,int modulo){
	int pro=1;
	int nn=n;
	while(m){
		if(m%2==1)pro=pro*nn%modulo;
		m=m/2;
		nn=nn*nn%modulo;
	}
	return pro;
}
int inv(int n,int m){
	int t=poow(m,mod-2)%mod;
	return n*t%mod;
}
int com(int n,int m){
	if(n<m)return 0;
	int bunsi=1,bunbo=1;	
	for(int i=n-m+1;i<=n;i++)bunsi=bunsi*i%mod;
	for(int i=1;i<=m;i++)bunbo=bunbo*i%mod;
	return inv(bunsi,bunbo);
}
int minpow(int x, int y) {
	int sum = 1;
	rep(0, i, y)sum *= x;
	return sum;
}
int ketawa(int x, int sinsuu) {
	int sum = 0;
	rep(0, i, 100)sum += (x % poow(sinsuu, i + 1)) / (poow(sinsuu, i));
	return sum;
}
int sankaku(int a) {
	return a * (a + 1) / 2;
}
int sames(int a[1111111], int n) {
	int ans = 0;
	rep(0, i, n) {
		if (a[i] == a[i + 1]) {
			int j = i;
			while (a[j + 1] == a[i] && j <= n - 2)j++;
			ans += sankaku(j - i);
			i = j;
		}
	}
	return ans;
}
struct UnionFind {
	vector<int> par;
	UnionFind(int n):par(n){
		rep(0,i,n)par[i]=i;
	}
	int root(int x){
		if (par[x]==x)return x;
		return par[x]=root(par[x]);
	}
	void unite(int x,int y){
		int rx=root(x);
		int ry=root(y);
		if (rx==ry) return; 
		par[rx]=ry;
	}
	bool same(int x,int y){
		int rx=root(x);
		int ry=root(y);
		return rx==ry;
	}
};	
int dijkstraa[514514];
void dijkstra(int n,int m,int c[750001],int d[750001],int l[750001],int siten,bool mukou){
	vector<P> e[514514];
	rep(0,i,m){
		e[c[i]].pb(P{l[i],d[i]});
		if(mukou)e[d[i]].pb(P{l[i],c[i]});
	}
	rep(0,i,n)dijkstraa[i]=inf;
	dijkstraa[siten]=0;
	priority_queue<P,vector<P>,greater<P>>pp;
	pp.push(P{0,siten});
	while(!pp.empty()){
		P t=pp.top();pp.pop();
		if(t.first!=dijkstraa[t.second])continue;
		rep(0,i,e[t.s].size()){
			P g=e[t.s][i];
			if(dijkstraa[g.second]>t.first+g.first){
				dijkstraa[g.second]=t.first+g.first;
				pp.push(P{dijkstraa[g.second],g.second});				
			}	
		}
	}
}
int dijkstra2(int shuten){
	return dijkstraa[shuten];
}
vector<int> toposo(vector<vector<int>> G,vector<int> indegree,int n){
	vector<int> sorted_vertices;
	queue<int> que;
	rep(0,i,n)if(!indegree[i])que.push(i);
	while(!que.empty()){
		int v=que.front();
		que.pop();
		rep(0,i,G[v].size()){
			int u=G[v][i];
			indegree[u]-=1;
			if(!indegree[u])que.push(u);
		}
		sorted_vertices.pb(v);
	}
	return sorted_vertices;
}
struct segtree{
	vector<int> dat;
	int n;
	segtree(int n_):n(),dat(n_*4,inf){
		int x=1;
		while(n_>=x)x*=2;
		n=x;
	}
	void update(int i,int x){
		i+=n-1;
		dat[i]=x;
		while(i>0){
			i=(i-1)/2;
			dat[i]=min(dat[i*2+1],dat[i*2+2]);
		}
	}
	int query(int a,int b){return query_sub(a,b,0,0,n);}
	int query_sub(int a,int b,int k,int l,int r){
		if(r<=a||b<=l)return inf;
		else if(a<=l&&r<=b)return dat[k];
		else{
			int vl=query_sub(a,b,k*2+1,l,(l+r)/2);
			int vr=query_sub(a,b,k*2+2,(l+r)/2,r);
			return min(vl,vr);
		}
	}
	int rightest(int a,int b,int x){return rightest_sub(a,b,x,0,0,n);}
	int rightest_sub(int a,int b,int x,int k,int l,int r){
		if(dat[k]>x||r<=a||b<=l)return a-1;
		else if(k>=n-1)return k-(n-1);
		else{
			int vr=rightest_sub(a,b,x,2*k+2,(l+r)/2,r);
			if(vr!=a-1)return vr;
			else return rightest_sub(a,b,x,2*k+1,l,(l+r)/2);
		}	
	}
	int leftest(int a,int b,int x){return leftest_sub(a,b,x,0,0,n);}
	int leftest_sub(int a,int b,int x,int k,int l,int r){
		if(dat[k]>x||r<=a||b<=l)return b;
		else if(k>=n-1)return k-(n-1);
		else{
			int vl=leftest_sub(a,b,x,2*k+1,l,(l+r)/2);
			if(vl!=b)return vl;
			else return leftest_sub(a,b,x,2*k+2,(l+r)/2,r);
		}	
	}
};
template<int MOD> struct Fp {
    long long val;
    constexpr Fp(long long v = 0) noexcept : val(v % MOD) {
        if (val < 0) v += MOD;
    }
    constexpr int getmod() { return MOD; }
    constexpr Fp operator - () const noexcept {
        return val ? MOD - val : 0;
    }
    constexpr Fp operator + (const Fp& r) const noexcept { return Fp(*this) += r; }
    constexpr Fp operator - (const Fp& r) const noexcept { return Fp(*this) -= r; }
    constexpr Fp operator * (const Fp& r) const noexcept { return Fp(*this) *= r; }
    constexpr Fp operator / (const Fp& r) const noexcept { return Fp(*this) /= r; }
    constexpr Fp& operator += (const Fp& r) noexcept {
        val += r.val;
        if (val >= MOD) val -= MOD;
        return *this;
    }
    constexpr Fp& operator -= (const Fp& r) noexcept {
        val -= r.val;
        if (val < 0) val += MOD;
        return *this;
    }
    constexpr Fp& operator *= (const Fp& r) noexcept {
        val = val * r.val % MOD;
        return *this;
    }
    constexpr Fp& operator /= (const Fp& r) noexcept {
        long long a = r.val, b = MOD, u = 1, v = 0;
        while (b) {
            long long t = a / b;
            a -= t * b; swap(a, b);
            u -= t * v; swap(u, v);
        }
        val = val * u % MOD;
        if (val < 0) val += MOD;
        return *this;
    }
    constexpr bool operator == (const Fp& r) const noexcept {
        return this->val == r.val;
    }
    constexpr bool operator != (const Fp& r) const noexcept {
        return this->val != r.val;
    }
    friend constexpr ostream& operator << (ostream &os, const Fp<MOD>& x) noexcept {
        return os << x.val;
    }
    friend constexpr istream& operator >> (istream &is, Fp<MOD>& x) noexcept {
        return is >> x.val;
    }
    friend constexpr Fp<MOD> modpow(const Fp<MOD> &a, long long n) noexcept {
        if (n == 0) return 1;
        auto t = modpow(a, n / 2);
        t = t * t;
        if (n & 1) t = t * a;
        return t;
    }
};
using mint=Fp<mod>;
mint dp[55555][30][30];
signed main(){
	ic(n) sc(s)
	if(n<=1){
		if(n==1){
			if(s[0]=='?')c(26)
			else c(1)
			return 0;
		}
	}
	if(s[0]=='?'){
		if(s[1]=='?'){
			rep(0,i,26)rep(0,j,26)if(i!=j)dp[2][i][j]=1;
		}
		else{
			rep(0,i,26)if(i!=s[1]-'a')dp[2][s[1]-'a'][i]=1;
		}
	}
	else{
		if(s[1]=='?'){
			rep(0,i,26)if(i!=s[0]-'a')dp[2][i][s[0]-'a']=1;
		}
		else{
			if(s[0]==s[1]){
				c(0)
				return 0;
			}
			else{
				dp[2][s[0]-'a'][s[1]-'a']=1;
			}
		}
	}
	rep(2,i,n){
		rep(0,j,26){
			rep(0,l,26){
				if(s[i]=='?'){
					rep(0,m,26){
						if(j!=m&&l!=m){
							dp[i+1][m][l]+=dp[i][l][j];
						}
					}
				}
				else{
					if(s[i]-'a'!=j&&s[i]-'a'!=l){
						dp[i+1][s[i]-'a'][l]+=dp[i][l][j];
					}
				}	
			}
		}
	}
	mint ans=0;
	rep(0,i,26)rep(0,j,26)ans+=dp[n][i][j];
	c(ans)
}
0