結果
問題 | No.1996 <>< |
ユーザー |
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提出日時 | 2022-07-01 22:30:11 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 96 ms / 2,000 ms |
コード長 | 2,593 bytes |
コンパイル時間 | 4,559 ms |
コンパイル使用メモリ | 260,772 KB |
最終ジャッジ日時 | 2025-01-30 03:07:45 |
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 29 |
ソースコード
#include <bits/stdc++.h>using namespace std;//*#include <atcoder/all>using namespace atcoder;//using mint = modint998244353;using mint = modint1000000007;//*/using ll = long long;using ld = long double;using pll = pair<ll, ll>;using tlll = tuple<ll, ll, ll>;constexpr ll INF = 1LL << 60;template<class T> bool chmin(T& a, T b) {if (a > b) {a = b; return true;} return false;}template<class T> bool chmax(T& a, T b) {if (a < b) {a = b; return true;} return false;}ll safemod(ll A, ll M) {ll res = A % M; if (res < 0) res += M; return res;}ll divfloor(ll A, ll B) {if (B < 0) {return divfloor(-A, -B);} return (A - safemod(A, B)) / B;}ll divceil(ll A, ll B) {if (B < 0) {return divceil(-A, -B);} return divfloor(A + B - 1, B);}ll mypowl(ll A, ll B) {ll res = 1; for (int i = 0; i < B; i++) {res *= A;} return res;}template<class T> void unique(vector<T> &V) {V.erase(unique(V.begin(), V.end()), V.end());}template<class T> void sortunique(vector<T> &V) {sort(V.begin(), V.end()); V.erase(unique(V.begin(), V.end()), V.end());}#define FINALANS(A) do {cout << (A) << '\n'; exit(0);} while (false)template<class T> void printvec(const vector<T> &V) {int _n = V.size(); for (int i = 0; i < _n; i++) cout << V[i] << (i == _n - 1 ? "" : " ");cout <<'\n';}template<class T> void printvect(const vector<T> &V) {for (auto v : V) cout << v << '\n';}template<class T> void printvec2(const vector<vector<T>> &V) {for (auto &v : V) printvec(v);}template <class T>vector<T> zarts_light(const vector<T> &V, int cnt = 0){vector<T> W = vector<T>(V);sortunique(W);vector<T> res(V.size());for (int i = 0; i < (int)V.size(); i++){res[i] = cnt + lower_bound(W.begin(), W.end(), V[i]) - W.begin();}return res;}int main(){ll N, K;cin >> N >> K;vector<ll> A(N);for (ll i = 0; i < N; i++){cin >> A.at(i);}string S;cin >> S;A = zarts_light(A);vector dp(K + 1, vector(N, mint(0)));for (ll i = 0; i < N; i++){dp.at(0).at(i) = 1;}for (ll j = 0; j < K; j++){fenwick_tree<mint> fw(N);for (ll i = 0; i < N; i++){if (S.at(j) == '<')dp.at(j + 1).at(i) = fw.sum(0, A.at(i));elsedp.at(j + 1).at(i) = fw.sum(A.at(i) + 1, N);fw.add(A.at(i), dp.at(j).at(i));}}mint ans = 0;for (ll i = 0; i < N; i++){mint tmp = dp.at(K).at(i);ans += tmp;}cout << ans.val() << endl;/*for (ll j = 0; j < K + 1; j++){for (ll i = 0; i < N; i++){cerr << j << " " << i << " " << dp.at(j).at(i).val() << endl;}}//*/}