結果
| 問題 |
No.852 連続部分文字列
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2019-09-02 00:18:51 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 60 ms / 3,153 ms |
| コード長 | 2,766 bytes |
| コンパイル時間 | 1,566 ms |
| コンパイル使用メモリ | 167,328 KB |
| 実行使用メモリ | 6,820 KB |
| 最終ジャッジ日時 | 2024-11-30 01:30:10 |
| 合計ジャッジ時間 | 4,184 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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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
#include <bits/stdc++.h>
using namespace std;
struct Fast {
Fast() {
std::cin.tie(0);
ios::sync_with_stdio(false);
cout.precision(20);
}
} fast;
/* define */
#define FOR(I, X, Y) for (long long(I) = (X); (I) < (Y); (I)++)
#define REP(I, X, Y) for (long long(I) = (Y)-1; (I) >= (X); (I)--)
#define ALL(X) (X).begin(), (X).end()
#define pb push_back
#define COUNT(V, X) \
(upper_bound((V).begin(), (V).end(), X) - \
lower_bound((V).begin(), (V).end(), X))
#define debug(x) cerr << #x << ':' << x << endl;
#define DEBUG(v) \
{ \
cerr << #v << ':'; \
for (auto xv : v) cerr << xv << ' '; \
cerr << endl; \
}
#define Yes(X) cout << (X ? "Yes" : "No") << endl;
#define YES(X) cout << (X ? "YES" : "NO") << endl;
#define ctoi(C) (C - '0')
#define pow2(x) ((long long)((long long)1 << x))
/* alias */
using ll = long long;
using ld = long double;
using vi = vector<int>;
using vii = vector<vector<int>>;
using vl = vector<long long>;
using vll = vector<vector<long long>>;
using pi = pair<int, int>;
using pl = pair<long long, long long>;
template <typename T>
using PQ = priority_queue<T>;
template <typename T>
using minPQ = priority_queue<T, vector<T>, greater<T>>;
/* const */
const long long dx[] = {1, 0, -1, 0};
const long long dy[] = {0, 1, 0, -1};
const long long dx8[] = {1, 1, 0, -1, -1, -1, 0, 1};
const long long dy8[] = {0, 1, 1, 1, 0, -1, -1, -1};
const long long dx9[] = {1, 1, 0, -1, -1, -1, 0, 1, 0};
const long long dy9[] = {0, 1, 1, 1, 0, -1, -1, -1, 0};
const int INF = 1000000007;
const long long LINF = 1000000000000000007;
/* func */
template <typename T1, typename T2>
inline bool chmin(T1 &a, const T2 &b) {
if (a > b) a = b;
return a > b;
}
template <typename T1, typename T2>
inline bool chmax(T1 &a, const T2 &b) {
if (a < b) a = b;
return a < b;
}
long long max(long long x, int y) {
return max(x, (long long)y);
}
long long max(int x, long long y) {
return max((long long)x, y);
}
long long min(long long x, int y) {
return min(x, (long long)y);
}
long long min(int x, long long y) {
return min((long long)x, y);
}
/* library */
/* main */
signed main() {
string S;
cin >> S;
ll N = S.size();
ld ans = 13 * N * (N + 1);
for (char c = 'a'; c <= 'z'; c++) {
int i = 0;
while (i < N) {
ld cnt = 0;
while (i < N && S[i] != c) {
cnt += 1;
i++;
}
ans -= cnt * (cnt + 1) / 2;
while (i < N && S[i] == c) i++;
}
}
cout << 2 * ans / (ld)N / ((ld)N + 1) << endl;
}