結果
問題 | No.1740 Alone 'a' |
ユーザー | aiueoka |
提出日時 | 2021-11-13 17:21:16 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 23 ms / 2,000 ms |
コード長 | 5,074 bytes |
コンパイル時間 | 3,615 ms |
コンパイル使用メモリ | 243,672 KB |
実行使用メモリ | 14,412 KB |
最終ジャッジ日時 | 2024-11-27 14:59:58 |
合計ジャッジ時間 | 4,969 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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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 | 1 ms
6,816 KB |
testcase_02 | AC | 2 ms
6,820 KB |
testcase_03 | AC | 21 ms
14,296 KB |
testcase_04 | AC | 23 ms
14,412 KB |
testcase_05 | AC | 2 ms
6,816 KB |
testcase_06 | AC | 2 ms
6,820 KB |
testcase_07 | AC | 1 ms
6,820 KB |
testcase_08 | AC | 1 ms
6,820 KB |
testcase_09 | AC | 2 ms
6,820 KB |
testcase_10 | AC | 1 ms
6,816 KB |
testcase_11 | AC | 5 ms
6,816 KB |
testcase_12 | AC | 18 ms
12,200 KB |
testcase_13 | AC | 16 ms
11,764 KB |
testcase_14 | AC | 20 ms
13,732 KB |
testcase_15 | AC | 2 ms
6,816 KB |
testcase_16 | AC | 17 ms
11,264 KB |
testcase_17 | AC | 2 ms
6,816 KB |
testcase_18 | AC | 4 ms
6,820 KB |
testcase_19 | AC | 18 ms
12,260 KB |
testcase_20 | AC | 11 ms
7,936 KB |
testcase_21 | AC | 13 ms
9,728 KB |
testcase_22 | AC | 14 ms
10,820 KB |
testcase_23 | AC | 15 ms
10,944 KB |
testcase_24 | AC | 11 ms
7,936 KB |
testcase_25 | AC | 11 ms
7,936 KB |
testcase_26 | AC | 14 ms
9,472 KB |
testcase_27 | AC | 15 ms
9,984 KB |
testcase_28 | AC | 12 ms
8,704 KB |
testcase_29 | AC | 20 ms
13,804 KB |
testcase_30 | AC | 15 ms
9,728 KB |
testcase_31 | AC | 16 ms
11,136 KB |
testcase_32 | AC | 13 ms
8,832 KB |
testcase_33 | AC | 16 ms
10,988 KB |
testcase_34 | AC | 5 ms
6,820 KB |
testcase_35 | AC | 12 ms
8,704 KB |
testcase_36 | AC | 11 ms
7,680 KB |
testcase_37 | AC | 5 ms
6,816 KB |
testcase_38 | AC | 9 ms
7,040 KB |
testcase_39 | AC | 3 ms
6,820 KB |
testcase_40 | AC | 6 ms
6,816 KB |
ソースコード
#include<bits/stdc++.h> #include<atcoder/all> using namespace std; using namespace atcoder; using ll=long long; using ld=long double; using vvi=vector<vector<int>>; using vi=vector<int>; using vpi=vector<pair<int,int>>; using vvl=vector<vector<ll>>; using vl=vector<ll>; using vpl=vector<pair<ll,ll>>; using vb=vector<bool>; using vvb=vector<vb>; using mint=modint1000000007; using mint9=modint998244353; using P=pair<ll,ll>; using Pi=pair<int,int>; #define outs cout << " " #define outl cout << endl ll mod1=1000000007,mod2=998244353; ll intmax=2147483647,llmax=9223372036854775807; #define rep(i, s, n) for (ll i = s; i < (ll)(n); i++) #define dep(i, s, n) for (ll i = n-1; i >=(ll)(s); i--) #define rem(i, s, n, t) for(ll i = s; i < (ll)(n); t, i++) #define dem(i, s, n, t) for(ll i = n-1; i >=(ll)(s); t, i--) #define all(a) (a).begin(),(a).end() #define allr(a) (a).rbegin(),(a).rend() #define nr cout << "No" << endl;return 0; #define print(a) cout << a << " " #define np next_permutation #define fi first #define se second #define sor(a) sort(all(a)) #define sorr(a) sort(allr(a)) #define grl greater<ll> #define gri greater<int> #define sizel(a) ll(a.size()) #define pb push_back #define alout(a) {rep(i,0,a.size())cout << a[i] << " ";outl;} #define chmax(a,b) a=max(a,b); #define chmin(a,b) a=min(a,b); void fix(ll a){cout << fixed << setprecision(a);} void yn(bool a){if(a){cout<<"Yes"<<endl;}else{cout<<"No"<<endl;}} void alllut(vi s){rep(i,0,s.size())cout << s[i] << " ";outl;} void allout(vl s){ rep(i,0,s.size()-1)cout << s[i] << " "; cout << s[s.size()-1] << endl; } void ifout(bool a,ll x,ll y){cout << ((a)?x:y);} void paut(pair<ll,ll> s){cout << s.fi << " " << s.se << endl;} void pout(pair<ll,ll> s){cout << s.fi << " " << s.se << endl;} ll keta(ll i,ll j){i=i%ll(pow(10,j))/ll(pow(10,j-1));return i;}// j = 0 は ダメ ll pm1(ll x,ll y){ll s=1;for(ll i=0;i<y;i++)s=s*x%mod1;return s;} ll pm2(ll x,ll y){ll s=1;for(ll i=0;i<y;i++)s=s*x%mod2;return s;} mint cnvm(ll x,ll y){if(x<y)return 0;mint s=1;rep(i,1,y+1){s=s*(x+1-i)/i;}return s;} mint9 cnvm9(ll x,ll y){if(x<y)return 0;mint9 s=1;rep(i,1,y+1){s=s*(x+1-i)/i;}return s;} ll cnv(ll x,ll y){if(x<y)return 0;ll s=1;rep(i,1,y+1){s=s*(x+1-i)/i;}return s;} ll gcd(ll a,ll b){for(;min(a,b)>0;)if(a<b)b%=a;else a%=b;return max(a,b);} ll lcm(ll a,ll b){return a/gcd(a,b)*b;} string tak="Takahashi",aok="Aoki",yes="Yes",no="No",fir="First",sec="Second"; ll kosuu(ll a,ll b){return max(ll(0),b-a+1);} ll modpow(ll a,ll b,ll mod=llmax){ ll ans=1; while(b){ if(b%2==1)ans=ans*a%mod; a=a*a%mod; b/=2; } return ans; } void asdf(){cout << "?" << endl;} /* ll l=0,r=a.size(); while(l+1<r){ ll w=(l+r)/2; if(w<(=:tarを含むとき)tar) else } */ // '0'=48, 'A'=65, 'Z'=90, 'a'=97', 'z'=122 string tolower(string s){ rep(i,0,s.size())if(s[i]<91)s[i]=s[i]+32; return s; } string toupper(string s){ rep(i,0,s.size())if(s[i]>96)s[i]=s[i]-32; return s; } ll MAX,mod=mod1; vl fac,finv,inv; void COMinit(){ MAX++; fac.resize(MAX); finv.resize(MAX); inv.resize(MAX); fac[0]=fac[1]=1; finv[0]=finv[1]=1; inv[1]=1; rep(i,2,MAX){ fac[i]=fac[i-1]*i%mod; inv[i]=mod-inv[mod%i]*(mod/i)%mod; finv[i]=finv[i-1]*inv[i]%mod; } } ll com(ll n,ll k){ if(n<k)return 0; if(n<0||k<0)return 0; return fac[n]*(finv[k]*finv[n-k]%mod)%mod; } ll MAx; vl fact; void FACT(){ fact=vl(MAx+1,1); rep(i,1,MAx+1)fact[i]=fact[i-1]*i; } ll upper(vl a,ll b){ //if(a[0]>b) ll l=0,r=a.size()-1; while(l+1<r){ ll w=(l+r)/2; if(a[w]<=b)l=w; else r=w; } return l+1; } ll lower(vl a,ll b){ ll l=0,r=a.size()-1; while(l+1<r){ ll w=(l+r)/2; if(a[w]<b)l=w; else r=w; } return l+1; } ll dai(ll n){ vi s; while(n){ s.push_back(n%10); n/=10; } sort(all(s)); for(int i=s.size()-1;i>-1;i--){ n+=s[i]*pow(10,i); } return n; } ll syou(ll n){ vi s; while(n){ s.push_back(n%10); n/=10; } sort(all(s)); rep(i,0,s.size()){ n+=s[i]*pow(10,s.size()-i-1); } return n; } ll yakusuu(ll a){ ll co=0; for(ll i=1;i*i<a;i++)if(a%i==0)co+=2; if(a==pow((int)sqrt(a),2))co++; return co; } void pin(P &a){ cin>>a.fi>>a.se; } bool prime(ll a){ rep(i,2,sqrt(a)+1)if(a%i==0)return 0; return 1; } ll LIS(vl a){ vl ret; for(ll u:a){ auto itr=lower_bound(all(ret),u); if(itr!=ret.end())*itr=u; else ret.push_back(u); } return ll(ret.size()); } // priority_queue<ll,vl,grl> greater ll sl=1,ls=0,inf=1e18; // segtree l~r-1 int main(){ ll n;cin>>n; string s;cin>>s; vector<vector<mint9>> dp(n+1,vector<mint9>(4)); // 0:ok,0 1:ok,1 2:out,0 3:out,1 dp[0][2]=1; rep(i,0,n){ dp[i+1][0]+=dp[i][0]*25+dp[i][2]*max(0,s[i]-'a'-1); dp[i+1][1]+=dp[i][0]+dp[i][1]*25+dp[i][2]*(s[i]!='a')+dp[i][3]*max(0,s[i]-'a'-1); dp[i+1][2]+=dp[i][2]*(s[i]!='a'); dp[i+1][3]+=dp[i][2]*(s[i]=='a')+dp[i][3]*(s[i]!='a'); } mint9 ans=dp[n][1]+dp[n][3]; ll co=0; rep(i,0,n)if(s[i]=='a')co++; if(co==1)ans--; cout << ans.val() << endl; }