結果
問題 | No.852 連続部分文字列 |
ユーザー | kurarrr |
提出日時 | 2019-07-26 21:50:42 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 33 ms / 3,153 ms |
コード長 | 2,606 bytes |
コンパイル時間 | 1,910 ms |
コンパイル使用メモリ | 201,456 KB |
最終ジャッジ日時 | 2025-01-07 07:50:48 |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 41 |
ソースコード
#ifdef DEBUG_IS_VALID #define DEB 1 #define _LIBCPP_DEBUG 0 #else #define DEB 0 #define NDEBUG #endif #include <bits/stdc++.h> using namespace std; #define ALL(g) (g).begin(),(g).end() #define REP(i, x, n) for(int i = x; i < n; i++) #define rep(i,n) REP(i,0,n) #define RREP(i, x, n) for(int i = x; i >= n; i--) #define rrep(i, n) RREP(i,n,0) #define pb push_back #define fi first #define se second #pragma GCC optimize ("-O3") using namespace std; #define DUMPOUT cout #define dump(...) if(DEB) DUMPOUT<<" "<<#__VA_ARGS__<<" :["<<__LINE__<<":"<<__FUNCTION__<<"]"<<endl<<" "; if(DEB) dump_func(__VA_ARGS__) template<typename T1,typename T2>ostream& operator << (ostream& os, pair<T1,T2> p){cout << "(" << p.first << ", " << p.second << ")"; return os;} template<typename T>ostream& operator << (ostream& os, vector<T>& vec) { os << "{"; for (int i = 0; i<vec.size(); i++) os << vec[i] << (i + 1 == vec.size() ? "" : ", "); os << "}"; return os; } template<typename T>ostream& operator << (ostream& os, set<T>& st){cout << "{"; for(auto itr = st.begin(); itr != st.end(); itr++) cout << *itr << (next(itr)!=st.end() ? ", " : ""); cout << "}"; return os;} template<typename T1,typename T2>ostream& operator << (ostream& os, map<T1,T2> mp){cout << "{"; for(auto itr = mp.begin(); itr != mp.end(); itr++) cout << "(" << (itr->first) << ", " << (itr->second) << ")" << (next(itr)!=mp.end() ? "," : ""); cout << "}"; return os; } void dump_func(){DUMPOUT << endl;} template <class Head, class... Tail>void dump_func(Head&& head, Tail&&... tail){ DUMPOUT << head; if (sizeof...(Tail) == 0) { DUMPOUT << " "; } else { DUMPOUT << ", "; } dump_func(std::move(tail)...);} template<class T> inline bool chmax(T& a,T const& b){if(a>=b) return false; a=b; return true;} template<class T> inline bool chmin(T& a,T const& b){if(a<=b) return false; a=b; return true;} void solve(); int main(void) { std::cout << std::fixed << std::setprecision(15); solve(); return 0; } using ll = long long; using P = pair<int,int>; using Pl = pair<ll,ll>; using vi = vector<int>; using vvi = vector<vi>; using vl = vector<ll>; using vvl = vector<vl>; using vp = vector<Pl>; using vvp = vector<vp>; const int INF = 1<<29; const long long LINF=1LL<<59; void solve(){ string s; cin >> s ; ll N = s.size(); vvl idx(26,vl(1,-1LL)); ll ans = 26LL * N*(N+1)/2; rep(i,N) idx[int(s[i]-'a')].pb(i); rep(j,26) idx[j].pb(N); rep(j,26){ ll sz = idx[j].size(); rep(i,sz-1){ ll t = idx[j][i+1]-idx[j][i]-1; ans -= t*(t+1)/2; } } dump(ans); cout << double(ans)/double(N*(N+1)/2LL) << endl; }