結果
問題 | No.1845 Long Substrings |
ユーザー |
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提出日時 | 2024-05-19 12:48:00 |
言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 41 ms / 2,000 ms |
コード長 | 2,730 bytes |
コンパイル時間 | 5,965 ms |
コンパイル使用メモリ | 313,684 KB |
実行使用メモリ | 6,820 KB |
最終ジャッジ日時 | 2024-12-20 16:58:11 |
合計ジャッジ時間 | 8,726 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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ファイルパターン | 結果 |
---|---|
other | AC * 34 |
ソースコード
#include <bits/stdc++.h>using namespace std;#if __has_include(<atcoder/all>)#include <atcoder/all>using mint = atcoder::modint1000000007;istream& operator>>(istream& is, mint& a) {int t; is >> t; a = t;return is;}ostream& operator<<(ostream& os, mint a) {return os << a.val();}#endif#ifdef DEBUG#define _GLIBCXX_DEBUG#else#pragma GCC target("avx2")#pragma GCC optimize("Ofast,unroll-loops")#define cerr if (false) cerr#undef assert#define assert(...) void(0)#undef endl#define endl '\n'#endif#define overload3(a, b, c, name, ...) name#define rep1(n) for (int i = 0; i < n; i++)#define rep2(i, n) for (int i = 0; i < n; i++)#define rep3(i, a, b) for (int i = a; i < b; i++)#define rep(...) overload3(__VA_ARGS__, rep3, rep2, rep1)(__VA_ARGS__)#define per1(n) for (int i = n - 1; i >= 0; i--)#define per2(i, n) for (int i = n - 1; i >= 0; i--)#define per3(i, a, b) for (int i = b - 1; i >= (a); i--)#define per(...) overload3(__VA_ARGS__, per3, per2, per1)(__VA_ARGS__)#define ALL(a) a.begin(), a.end()#define vec vector#undef long#define long long longtemplate<typename T>ostream& operator<<(ostream& os, vector<T> a) {const int n = a.size();rep(i, n) os << a[i] << " \n"[i + 1 == n];return os;}template<typename T, size_t n>ostream& operator<<(ostream& os, array<T, n> a) {rep(i, n) os << a[i] << " \n"[i + 1 == n];return os;}template<typename T>istream& operator>>(istream& is, vector<T>& a) {for (T& i : a) is >> i;return is;}template<typename T>bool chmin(T& x, T y) {if (x > y) { x = y; return true; }return false;}template<typename T>bool chmax(T& x, T y) {if (x < y) { x = y; return true; }return false;}template<typename T>void operator++(vector<T>& a) {for (T& i : a) ++i;}template<typename T>void operator--(vector<T>& a) {for (T& i : a) --i;}template<typename T>void operator++(vector<T>& a, int) {for (T& i : a) i++;}template<typename T>void operator--(vector<T>& a, int) {for (T& i : a) i--;}void solve(){int n; cin >> n;vec<mint> a(n); cin >> a;string s; cin >> s;vec<mint> d(n + 1);atcoder::fenwick_tree<mint> fw(n + 1);d[0] = 1;fw.add(0, 1);array<int, 26> pre = {};rep(i, n) {const int c = s[i] - 'a';mint val = d[pre[c]] + fw.sum(pre[c] + 1, i + 1);d[i + 1] = val;fw.add(i + 1, val * a[i]);pre[c] = i + 1;}cout << fw.sum(1, n + 1) << endl;}int main(){srand((unsigned)time(NULL));cin.tie(nullptr);ios::sync_with_stdio(false);cout << fixed << setprecision(40);int t = 1;// cin >> t;while (t--)solve();return 0;}