結果
問題 | No.1740 Alone 'a' |
ユーザー | smiken_61 |
提出日時 | 2022-02-13 22:09:26 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 361 ms / 2,000 ms |
コード長 | 8,793 bytes |
コンパイル時間 | 1,973 ms |
コンパイル使用メモリ | 211,548 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-06-29 05:51:12 |
合計ジャッジ時間 | 4,343 ms |
ジャッジサーバーID (参考情報) |
judge5 / 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
5,248 KB |
testcase_01 | AC | 1 ms
5,376 KB |
testcase_02 | AC | 1 ms
5,376 KB |
testcase_03 | AC | 356 ms
5,376 KB |
testcase_04 | AC | 361 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | AC | 1 ms
5,376 KB |
testcase_09 | AC | 2 ms
5,376 KB |
testcase_10 | AC | 2 ms
5,376 KB |
testcase_11 | AC | 4 ms
5,376 KB |
testcase_12 | AC | 9 ms
5,376 KB |
testcase_13 | AC | 8 ms
5,376 KB |
testcase_14 | AC | 10 ms
5,376 KB |
testcase_15 | AC | 1 ms
5,376 KB |
testcase_16 | AC | 8 ms
5,376 KB |
testcase_17 | AC | 2 ms
5,376 KB |
testcase_18 | AC | 3 ms
5,376 KB |
testcase_19 | AC | 8 ms
5,376 KB |
testcase_20 | AC | 5 ms
5,376 KB |
testcase_21 | AC | 7 ms
5,376 KB |
testcase_22 | AC | 8 ms
5,376 KB |
testcase_23 | AC | 8 ms
5,376 KB |
testcase_24 | AC | 6 ms
5,376 KB |
testcase_25 | AC | 6 ms
5,376 KB |
testcase_26 | AC | 7 ms
5,376 KB |
testcase_27 | AC | 7 ms
5,376 KB |
testcase_28 | AC | 6 ms
5,376 KB |
testcase_29 | AC | 10 ms
5,376 KB |
testcase_30 | AC | 7 ms
5,376 KB |
testcase_31 | AC | 9 ms
5,376 KB |
testcase_32 | AC | 7 ms
5,376 KB |
testcase_33 | AC | 9 ms
5,376 KB |
testcase_34 | AC | 4 ms
5,376 KB |
testcase_35 | AC | 6 ms
5,376 KB |
testcase_36 | AC | 6 ms
5,376 KB |
testcase_37 | AC | 3 ms
5,376 KB |
testcase_38 | AC | 5 ms
5,376 KB |
testcase_39 | AC | 2 ms
5,376 KB |
testcase_40 | AC | 4 ms
5,376 KB |
ソースコード
#include <bits/stdc++.h> // #include <atcoder/all> // using namespace atcoder; // tabaicho see https://boostjp.github.io/tips/multiprec-int.html // #include <boost/multiprecision/cpp_int.hpp> // using namespace boost::multiprecision; // cpp_int // int128_t // int256_t // int512_t // int1024_t // uint128_t // uint256_t // uint512_t // uint1024_t #define int long long #define inf 1000000007 // #define inf 998244353 #define pa pair<int,int> #define ppa pair<pa,pa> #define ll long long #define PI 3.14159265358979323846 #define mp make_pair #define pb push_back #define EPS (1e-8) using namespace std; int dx[8]={0,1,0,-1,1,1,-1,-1}; int dy[8]={1,0,-1,0,-1,1,1,-1}; class pa3{ public: int x; int y,z; pa3(int x=0,int y=0,int z=0):x(x),y(y),z(z) {} bool operator < (const pa3 &p) const{ if(x!=p.x) return x<p.x; if(y!=p.y) return y<p.y; return z<p.z; //return x != p.x ? x<p.x: y<p.y; } bool operator > (const pa3 &p) const{ if(x!=p.x) return x>p.x; if(y!=p.y) return y>p.y; return z>p.z; //return x != p.x ? x<p.x: y<p.y; } bool operator == (const pa3 &p) const{ return x==p.x && y==p.y && z==p.z; } bool operator != (const pa3 &p) const{ return !( x==p.x && y==p.y && z==p.z); } }; class pa4{ public: int x; int y,z,w; pa4(int x=0,int y=0,int z=0,int w=0):x(x),y(y),z(z),w(w) {} bool operator < (const pa4 &p) const{ if(x!=p.x) return x<p.x; if(y!=p.y) return y<p.y; if(z!=p.z)return z<p.z; return w<p.w; //return x != p.x ? x<p.x: y<p.y; } bool operator > (const pa4 &p) const{ if(x!=p.x) return x>p.x; if(y!=p.y) return y>p.y; if(z!=p.z)return z>p.z; return w>p.w; //return x != p.x ? x<p.x: y<p.y; } bool operator == (const pa4 &p) const{ return x==p.x && y==p.y && z==p.z &&w==p.w; } }; class pa2{ public: int x,y; pa2(int x=0,int y=0):x(x),y(y) {} pa2 operator + (pa2 p) {return pa2(x+p.x,y+p.y);} pa2 operator - (pa2 p) {return pa2(x-p.x,y-p.y);} bool operator < (const pa2 &p) const{ return y != p.y ? y<p.y: x<p.x; } bool operator > (const pa2 &p) const{ return x != p.x ? x<p.x: y<p.y; } bool operator == (const pa2 &p) const{ return abs(x-p.x)==0 && abs(y-p.y)==0; } bool operator != (const pa2 &p) const{ return !(abs(x-p.x)==0 && abs(y-p.y)==0); } }; string itos( int i ) { ostringstream s ; s << i ; return s.str() ; } int Gcd(int v,int b){ if(v==0) return b; if(b==0) return v; if(v>b) return Gcd(b,v); if(v==b) return b; if(b%v==0) return v; return Gcd(v,b%v); } int extgcd(int a, int b, int &x, int &y) { if (b == 0) { x = 1; y = 0; return a; } int d = extgcd(b, a%b, y, x); y -= a/b * x; return d; } pa operator+(const pa & l,const pa & r) { return {l.first+r.first,l.second+r.second}; } pa operator-(const pa & l,const pa & r) { return {l.first-r.first,l.second-r.second}; } pair<double,double> operator-(const pair<double,double> & l,const pair<double,double> & r) { return {l.first-r.first,l.second-r.second}; } ostream& operator<<(ostream& os, const vector<int>& VEC){ for(auto v:VEC)os<<v<<" "; return os; } ostream& operator<<(ostream& os, const pair<double,double>& PAI){ os<<PAI.first<<" : "<<PAI.second; return os; } ostream& operator<<(ostream& os, const pa& PAI){ os<<PAI.first<<" : "<<PAI.second; return os; } ostream& operator<<(ostream& os, const pa3& PAI){ os<<PAI.x<<" : "<<PAI.y<<" : "<<PAI.z; return os; } ostream& operator<<(ostream& os, const pa4& PAI){ os<<PAI.x<<" : "<<PAI.y<<" : "<<PAI.z<<" : "<<PAI.w; return os; } ostream& operator<<(ostream& os, const vector<pa>& VEC){ for(auto v:VEC)os<<v<<" "; return os; } ostream& operator<<(ostream& os, const vector<pa3>& VEC){ for(auto v:VEC){ os<<v<<" "; os<<endl; } return os; } int beki(int wa,ll rr,int warukazu){ if(rr==0) return 1%warukazu; if(rr==1) return wa%warukazu; wa%=warukazu; if(rr%2==1) return ((ll)beki(wa,rr-1,warukazu)*(ll)wa)%warukazu; ll zx=beki(wa,rr/2,warukazu); return (zx*zx)%warukazu; } int pr[2500002]; int inv[2500002]; const int mod=998244353; int comb(int nn,int rr){ if(nn==-1&&rr==-1)return 1; if(rr<0 || rr>nn || nn<0) return 0; int r=pr[nn]*inv[rr]; r%=mod; r*=inv[nn-rr]; r%=mod; return r; } void gya(int ert){ pr[0]=1; for(int i=1;i<=ert;i++){ pr[i]=((ll)pr[i-1]*i)%mod; } inv[ert]=beki(pr[ert],mod-2,mod); for(int i=ert-1;i>=0;i--){ inv[i]=(ll)inv[i+1]*(i+1)%mod; } } int beki(int a,int b){ int ANS=1; int be=a%mod; while(b){ if(b&1){ ANS*=be; ANS%=mod; } be*=be; be%=mod; b/=2; } return ANS; } // cin.tie(0); // ios::sync_with_stdio(false); //priority_queue<pa3,vector<pa3>,greater<pa3>> pq; //sort(ve.begin(),ve.end(),greater<int>()); // mt19937(clock_per_sec); // mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count()) ; // a,b,c : positive int a*b<=c <=> a<=c/b // auto dfs=[&](auto &&self,int r,int p)->int{ // }; class Point{ public: double x,y; Point(double x=0,double y=0):x(x),y(y) {} Point operator + (Point p) {return Point(x+p.x,y+p.y);} Point operator - (Point p) {return Point(x-p.x,y-p.y);} Point operator * (double a) {return Point(x*a,y*a);} Point operator / (double a) {return Point(x/a,y/a);} double absv() {return sqrt(norm());} double norm() {return x*x+y*y;} bool operator < (const Point &p) const{ return x != p.x ? x<p.x: y<p.y; } bool operator == (const Point &p) const{ return fabs(x-p.x)<EPS && fabs(y-p.y)<EPS; } }; class Line{ public: // y=ax+b double a; double b; Line(double a=0,double b=0):a(a),b(b) {} double eval(double x){return a*x+b;} bool operator < (const Line &p) const{ return abs(a-p.a)>EPS ? a<p.a: b<p.b; } }; Point intersect_line(Line A,Line B){ double x=(B.b-A.b)/(A.a-B.a); return Point(x,A.eval(x)); } Line line_from_2_Point(Point A,Point B){ // line which through A,B double a=(B.y-A.y)/(B.x-A.x); return Line(a,A.y-a*A.x); } struct unionfind{ private: public: vector<int> par,ranks,kosuu; void shoki(int N){ par.resize(N+1,0); ranks.resize(N+1,0); kosuu.resize(N+1,1); for(int i=0;i<=N;i++){ par[i]=i; } } int root(int x){ return par[x]==x ? x : par[x]=root(par[x]); } bool same(int x,int y){ return root(x)==root(y); } bool is_root(int x){ return x==root(x); } void unite(int x,int y){ x=root(x); y=root(y); int xx=kosuu[x],yy=kosuu[y]; if(x==y) return; if(ranks[x]<ranks[y]){ par[x]=y; kosuu[y]=yy+xx; } else { par[y]=x; if(ranks[x]==ranks[y]) ranks[x]=ranks[x]+1; kosuu[x]=yy+xx; } return; } }; void solve(){ int n; cin>>n; string s; cin>>s; int ans=0; int ko=0; for(int i=0;i<n;i++){ for(int c='a';c<s[i];c++){ int y=ko; if(c=='a')y++; int noko=n-1-i; if(y==1){ ans+=beki(25,noko); } else if(y==0 && noko>0){ ans+=noko*beki(25,noko-1)%mod; } ans%=mod; } if(s[i]=='a')ko++; } cout<<ans<<endl; } signed main(){ //mod=inf; cin.tie(0); ios::sync_with_stdio(false); int n=1; //cin>>n; for(int i=0;i<n;i++)solve(); return 0; }