結果
問題 | No.1740 Alone 'a' |
ユーザー | noya2 |
提出日時 | 2021-11-12 22:15:19 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 40 ms / 2,000 ms |
コード長 | 4,082 bytes |
コンパイル時間 | 4,388 ms |
コンパイル使用メモリ | 276,872 KB |
実行使用メモリ | 6,824 KB |
最終ジャッジ日時 | 2024-11-25 19:11:42 |
合計ジャッジ時間 | 5,841 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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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 | 2 ms
6,816 KB |
testcase_02 | AC | 1 ms
6,816 KB |
testcase_03 | AC | 40 ms
6,820 KB |
testcase_04 | AC | 39 ms
6,816 KB |
testcase_05 | AC | 2 ms
6,816 KB |
testcase_06 | AC | 2 ms
6,816 KB |
testcase_07 | AC | 2 ms
6,820 KB |
testcase_08 | AC | 2 ms
6,816 KB |
testcase_09 | AC | 2 ms
6,816 KB |
testcase_10 | AC | 2 ms
6,816 KB |
testcase_11 | AC | 2 ms
6,820 KB |
testcase_12 | AC | 5 ms
6,816 KB |
testcase_13 | AC | 5 ms
6,816 KB |
testcase_14 | AC | 5 ms
6,816 KB |
testcase_15 | AC | 2 ms
6,816 KB |
testcase_16 | AC | 4 ms
6,820 KB |
testcase_17 | AC | 2 ms
6,816 KB |
testcase_18 | AC | 2 ms
6,824 KB |
testcase_19 | AC | 5 ms
6,820 KB |
testcase_20 | AC | 4 ms
6,816 KB |
testcase_21 | AC | 4 ms
6,820 KB |
testcase_22 | AC | 5 ms
6,816 KB |
testcase_23 | AC | 5 ms
6,820 KB |
testcase_24 | AC | 4 ms
6,820 KB |
testcase_25 | AC | 3 ms
6,816 KB |
testcase_26 | AC | 3 ms
6,820 KB |
testcase_27 | AC | 4 ms
6,816 KB |
testcase_28 | AC | 4 ms
6,816 KB |
testcase_29 | AC | 5 ms
6,816 KB |
testcase_30 | AC | 4 ms
6,820 KB |
testcase_31 | AC | 5 ms
6,816 KB |
testcase_32 | AC | 4 ms
6,816 KB |
testcase_33 | AC | 4 ms
6,820 KB |
testcase_34 | AC | 2 ms
6,820 KB |
testcase_35 | AC | 3 ms
6,816 KB |
testcase_36 | AC | 4 ms
6,820 KB |
testcase_37 | AC | 2 ms
6,816 KB |
testcase_38 | AC | 3 ms
6,820 KB |
testcase_39 | AC | 2 ms
6,820 KB |
testcase_40 | AC | 3 ms
6,820 KB |
ソースコード
#include <bits/stdc++.h> /* #include <boost/multiprecision/cpp_dec_float.hpp> #include <boost/multiprecision/cpp_int.hpp> namespace mp = boost::multiprecision; using bint = mp::cpp_int; */ #include <atcoder/all> #include <iostream> #include <queue> #include <stack> #include <vector> #include <string> #include <set> #include <map> #include <random> #include <bitset> #define rep(i,n) for (int i = 0; i < int(n); ++i) #define repp(i,n,m) for (int i = m; i < int(n); ++i) #define repb(i,n) for (int i = int(n)-1; i >= 0; --i) #define fi first #define se second #define endl "\n" using namespace std; using namespace atcoder; using ll = long long; using ld = long double; using P = pair<int, int>; using PL = pair<long long, long long>; using Pxy = pair<long double, long double>; using pil = pair<int,ll>; using pli = pair<ll,int>; const int INF = 1001001007; const long long mod1 = 1000000007LL; const long long mod2 = 998244353LL; const ll inf = 2e18; const ld pi = 3.14159265358979323; const ld eps = 1e-7; template<class T>istream &operator>>(istream &is,vector<T> &v){for(auto &e:v)is>>e;return is;} template<class T>ostream &operator<<(ostream &os,const vector<T> &v){if(v.size()==0){os<<endl;}else{rep(i,v.size())os<<v[i]<<(i+1==v.size()?"\n":" ");}return os;} template<class T>istream &operator>>(istream &is,vector<vector<T>> &v){for(auto &e:v)is>>e;return is;} template<class T>ostream &operator<<(ostream &os,const vector<vector<T>> &v){if(v.size()==0){os<<endl;}else{for(auto &e:v)os<<e;}return os;} template<typename T>bool range(T a,T b,T x){return (a<=x&&x<b);} template<typename T>bool rrange(T a,T b,T c,T d,T x,T y){return (range(a,c,x)&&range(b,d,y));} template<typename T>void rev(vector<T> &v){reverse(v.begin(),v.end());} template<typename T>void sor(vector<T> &v, int f=0){sort(v.begin(),v.end());if(f!=0) rev(v);} template<typename T>bool chmin(T &a,const T &b){if(a>b){a=b;return true;}return false;} template<typename T>bool chmax(T &a,const T &b){if(a<b){a=b;return true;}return false;} template<typename T>void eru(vector<T> &v){sor(v);v.erase(unique(v.begin(),v.end()),v.end());} template<typename T>T cel(T a,T b){if(a%b==0)return a/b;return a/b +1;} template<typename T,typename U>void out2(T a,U b){cout<<a<<" "<<b<<endl;} template<typename T>void mout(T a){cout<<a.val()<<endl;} void yes(){cout << "Yes" << endl;} void no (){cout << "No" << endl;} void yn (bool t){if(t)yes();else no();} void dame(bool t){if(t){cout << -1 << endl;exit(0);}} void dout(ld h=-1.23456789){cout<<setprecision(20);if(abs(h+1.23456789)>eps)cout<<h<<endl;} void deb(ll h = INF-1) {cout << (h == INF-1 ? "!?" : to_string(h)) << endl;} void revs(string &s) {reverse(s.begin(),s.end());} vector<int> dx = {0,1,0,-1}; vector<int> dy = {1,0,-1,0}; const string ALP = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; const string alp = "abcdefghijklmnopqrstuvwxyz"; const string num = "0123456789"; ll gcds(ll a, ll b){ a = abs(a); b = abs(b); if (b == 0) return a; ll c = a % b; while (c != 0){ a = b; b = c; c = a % b; } return b; } ll tentou(vector<ll> ar){ int n = ar.size(); set<ll> st; rep(i,n) st.insert(ar[i]); map<ll,int> mp; int ind = 0; for (ll x : st){ mp[x] = ind; ind++; } fenwick_tree<ll> fw(ind); ll ans = 0; rep(i,n){ int a = mp[ar[i]]; ans += i - fw.sum(0,a+1); fw.add(a,1); } return ans; } /* alias g++='g++ -I/mnt/c/Users/Owner/Desktop/ac-library' */ struct vs{ vector<int> to; }; int main(){ int n; cin >> n; string s; cin >> s; using mint = modint998244353; mint ans = 0; int cnt = 0; mint m = 25; rep(i,n){ int h = s[i] - 'a'; if (h == 0) cnt++; if (cnt > 1) break; if (h == 0) continue; if (cnt == 1){ ans += m.pow(n-1-i) * mint(h-1); } else { ans += m.pow(n-1-i); if (i != n-1) ans += m.pow(n-2-i) * mint(n-1-i) * mint(h-1); } } int c = 0; rep(i,n) if (s[i] == 'a') c++; mout(ans); }