結果
問題 | No.1996 <>< |
ユーザー |
|
提出日時 | 2022-07-01 22:25:36 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 418 ms / 2,000 ms |
コード長 | 4,452 bytes |
コンパイル時間 | 2,300 ms |
コンパイル使用メモリ | 211,392 KB |
最終ジャッジ日時 | 2025-01-30 03:06:22 |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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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
#line 1 "main.cpp"#pragma region Macros#include <bits/stdc++.h>using namespace std;template <class T> inline bool chmax(T &a, T b) {if(a < b) {a = b;return 1;}return 0;}template <class T> inline bool chmin(T &a, T b) {if(a > b) {a = b;return 1;}return 0;}#ifdef DEBUGtemplate <class T, class U>ostream &operator<<(ostream &os, const pair<T, U> &p) {os << '(' << p.first << ',' << p.second << ')';return os;}template <class T> ostream &operator<<(ostream &os, const vector<T> &v) {os << '{';for(int i = 0; i < (int)v.size(); i++) {if(i) { os << ','; }os << v[i];}os << '}';return os;}void debugg() { cerr << endl; }template <class T, class... Args>void debugg(const T &x, const Args &... args) {cerr << " " << x;debugg(args...);}#define debug(...) \cerr << __LINE__ << " [" << #__VA_ARGS__ << "]: ", debugg(__VA_ARGS__)#define dump(x) cerr << __LINE__ << " " << #x << " = " << (x) << endl#else#define debug(...) (void(0))#define dump(x) (void(0))#endifstruct Setup {Setup() {cin.tie(0);ios::sync_with_stdio(false);cout << fixed << setprecision(15);}} __Setup;using ll = long long;#define OVERLOAD3(_1, _2, _3, name, ...) name#define ALL(v) (v).begin(), (v).end()#define RALL(v) (v).rbegin(), (v).rend()#define REP1(i, n) for(int i = 0; i < int(n); i++)#define REP2(i, a, b) for(int i = (a); i < int(b); i++)#define REP(...) OVERLOAD3(__VA_ARGS__, REP2, REP1)(__VA_ARGS__)#define UNIQUE(v) sort(ALL(v)), (v).erase(unique(ALL(v)), (v).end())#define SZ(v) ((int)(v).size())const int INF = 1 << 30;const ll LLINF = 1LL << 60;constexpr int MOD = 1000000007;constexpr int MOD2 = 998244353;const int dx[4] = {1, 0, -1, 0};const int dy[4] = {0, 1, 0, -1};void Case(int i) { cout << "Case #" << i << ": "; }int popcount(int x) { return __builtin_popcount(x); }ll popcount(ll x) { return __builtin_popcountll(x); }#pragma endregion Macros#include <atcoder/modint>using mint = atcoder::modint1000000007;#line 1 "/Users/siro53/kyo-pro/compro_library/data_structure/compress.hpp"template <typename T> struct Compress {vector<T> v;Compress() {}Compress(vector<T> vv) : v(vv) {sort(ALL(v));v.erase(unique(ALL(v)), end(v));}void build(vector<T> vv) {v = vv;sort(ALL(v));v.erase(unique(ALL(v)), end(v));}int get(T x) { return (int)(lower_bound(ALL(v), x) - v.begin()); }T &operator[](int i) { return v[i]; }size_t size() { return v.size(); }};#line 1 "/Users/siro53/kyo-pro/compro_library/data_structure/BIT.hpp"template <typename T> struct BIT {int n;vector<T> bit;BIT(){}BIT(int _n) { init(_n); }void init(int _n) {n = _n + 1;bit.resize(n + 1, 0);}// [0, k)T sum(int k) {T res = 0;for(int i = k - 1; i >= 0; i = (i & (i + 1)) - 1) { res += bit[i]; }return res;}// [l, r)T sum(int l, int r) { return (l < r ? sum(r) - sum(l) : 0); }// bit[k] += xvoid add(int k, T x) {for(int i = k; i < n; i |= i + 1) { bit[i] += x; }}// v[0] + ... + v[res] >= xint lower_bound(T x) {int res = -1;int k = 1;while(2 * k <= n) { k <<= 1; }for(; k > 0; k >>= 1) {if(res + k < n && bit[res + k] < x) {x -= bit[res + k];res += k;}}return res + 1;}};#line 81 "main.cpp"int main() {int N, K;cin >> N >> K;vector<int> a(N);REP(i, N) cin >> a[i];Compress<int> comp(a);int sz = SZ(comp);string s;cin >> s;auto isValid = [&](char c, int a1, int a2) -> bool {if(c == '<') {return (a1 < a2);}return (a1 > a2);};vector dp(K+1, vector<mint>(N, 0));REP(i, N) dp[0][i] = 1;REP(i, 1, K+1) {BIT<mint> bt(sz);REP(j, N) {if(s[i-1] == '<') {dp[i][j] = bt.sum(comp.get(a[j]));} else {dp[i][j] = bt.sum(comp.get(a[j]) + 1, sz);}bt.add(comp.get(a[j]), dp[i-1][j]);}}mint ans = 0;REP(j, N) ans += dp[K][j];cout << ans.val() << endl;}