結果

問題 No.1848 Long Prefixes
ユーザー heno239heno239
提出日時 2022-02-18 21:45:08
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
WA  
実行時間 -
コード長 5,655 bytes
コンパイル時間 1,966 ms
コンパイル使用メモリ 156,012 KB
実行使用メモリ 17,124 KB
最終ジャッジ日時 2024-06-29 08:36:13
合計ジャッジ時間 4,859 ms
ジャッジサーバーID
(参考情報)
judge3 / judge1
このコードへのチャレンジ
(要ログイン)

テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 42 ms
16,996 KB
testcase_01 WA -
testcase_02 WA -
testcase_03 AC 39 ms
17,120 KB
testcase_04 WA -
testcase_05 WA -
testcase_06 AC 37 ms
16,588 KB
testcase_07 WA -
testcase_08 WA -
testcase_09 AC 38 ms
16,772 KB
testcase_10 WA -
testcase_11 WA -
testcase_12 AC 36 ms
16,580 KB
testcase_13 WA -
testcase_14 WA -
testcase_15 AC 9 ms
11,648 KB
testcase_16 AC 9 ms
11,648 KB
testcase_17 AC 9 ms
11,776 KB
testcase_18 AC 8 ms
11,716 KB
testcase_19 AC 8 ms
11,776 KB
testcase_20 AC 8 ms
11,520 KB
testcase_21 AC 8 ms
11,648 KB
testcase_22 AC 8 ms
11,592 KB
testcase_23 AC 8 ms
11,584 KB
testcase_24 AC 8 ms
11,648 KB
testcase_25 AC 8 ms
11,648 KB
testcase_26 AC 8 ms
11,720 KB
testcase_27 AC 8 ms
11,592 KB
testcase_28 AC 8 ms
11,520 KB
testcase_29 AC 8 ms
11,588 KB
testcase_30 AC 8 ms
11,588 KB
testcase_31 AC 8 ms
11,648 KB
testcase_32 AC 8 ms
11,592 KB
testcase_33 AC 20 ms
13,760 KB
testcase_34 AC 25 ms
15,616 KB
testcase_35 WA -
testcase_36 AC 19 ms
13,472 KB
testcase_37 AC 21 ms
14,752 KB
testcase_38 AC 23 ms
14,448 KB
testcase_39 AC 20 ms
13,828 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include<iostream>
#include<string>
#include<cstdio>
#include<vector>
#include<cmath>
#include<algorithm>
#include<functional>
#include<iomanip>
#include<queue>
#include<ciso646>
#include<random>
#include<map>
#include<set>
#include<bitset>
#include<stack>
#include<unordered_map>
#include<unordered_set>
#include<utility>
#include<cassert>
#include<complex>
#include<numeric>
#include<array>
#include<chrono>
using namespace std;

//#define int long long
typedef long long ll;

typedef unsigned long long ul;
typedef unsigned int ui;
//constexpr ll mod = 998244353;
constexpr ll mod = 1000000007;
const ll INF = mod * mod;
typedef pair<int, int>P;

#define rep(i,n) for(int i=0;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define Rep(i,sta,n) for(int i=sta;i<n;i++)
#define rep1(i,n) for(int i=1;i<=n;i++)
#define per1(i,n) for(int i=n;i>=1;i--)
#define Rep1(i,sta,n) for(int i=sta;i<=n;i++)
#define all(v) (v).begin(),(v).end()
typedef pair<ll, ll> LP;

template<typename T>
void chmin(T& a, T b) {
	a = min(a, b);
}
template<typename T>
void chmax(T& a, T b) {
	a = max(a, b);
}
template<typename T>
void cinarray(vector<T>& v) {
	rep(i, v.size())cin >> v[i];
}
template<typename T>
void coutarray(vector<T>& v) {
	rep(i, v.size()) {
		if (i > 0)cout << " "; cout << v[i];
	}
	cout << "\n";
}
ll mod_pow(ll x, ll n, ll m = mod) {
	if (n < 0) {
		ll res = mod_pow(x, -n, m);
		return mod_pow(res, m - 2, m);
	}
	if (abs(x) >= m)x %= m;
	if (x < 0)x += m;
	//if (x == 0)return 0;
	ll res = 1;
	while (n) {
		if (n & 1)res = res * x % m;
		x = x * x % m; n >>= 1;
	}
	return res;
}
struct modint {
	int n;
	modint() :n(0) { ; }
	modint(ll m) {
		if (m < 0 || mod <= m) {
			m %= mod; if (m < 0)m += mod;
		}
		n = m;
	}
	operator int() { return n; }
};
bool operator==(modint a, modint b) { return a.n == b.n; }
modint operator+=(modint& a, modint b) { a.n += b.n; if (a.n >= mod)a.n -= mod; return a; }
modint operator-=(modint& a, modint b) { a.n -= b.n; if (a.n < 0)a.n += mod; return a; }
modint operator*=(modint& a, modint b) { a.n = ((ll)a.n * b.n) % mod; return a; }
modint operator+(modint a, modint b) { return a += b; }
modint operator-(modint a, modint b) { return a -= b; }
modint operator*(modint a, modint b) { return a *= b; }
modint operator^(modint a, ll n) {
	if (n == 0)return modint(1);
	modint res = (a * a) ^ (n / 2);
	if (n % 2)res = res * a;
	return res;
}

ll inv(ll a, ll p) {
	return (a == 1 ? 1 : (1 - p * inv(p % a, a)) / a + p);
}
modint operator/(modint a, modint b) { return a * modint(inv(b, mod)); }
modint operator/=(modint& a, modint b) { a = a / b; return a; }
const int max_n = 1 << 20;
modint fact[max_n], factinv[max_n];
void init_f() {
	fact[0] = modint(1);
	for (int i = 0; i < max_n - 1; i++) {
		fact[i + 1] = fact[i] * modint(i + 1);
	}
	factinv[max_n - 1] = modint(1) / fact[max_n - 1];
	for (int i = max_n - 2; i >= 0; i--) {
		factinv[i] = factinv[i + 1] * modint(i + 1);
	}
}
modint comb(int a, int b) {
	if (a < 0 || b < 0 || a < b)return 0;
	return fact[a] * factinv[b] * factinv[a - b];
}
modint combP(int a, int b) {
	if (a < 0 || b < 0 || a < b)return 0;
	return fact[a] * factinv[a - b];
}

ll gcd(ll a, ll b) {
	a = abs(a); b = abs(b);
	if (a < b)swap(a, b);
	while (b) {
		ll r = a % b; a = b; b = r;
	}
	return a;
}
typedef long double ld;
typedef pair<ld, ld> LDP;
const ld eps = 1e-8;
const ld pi = acosl(-1.0);
template<typename T>
void addv(vector<T>& v, int loc, T val) {
	if (loc >= v.size())v.resize(loc + 1, 0);
	v[loc] += val;
}
/*const int mn = 100005;
bool isp[mn];
vector<int> ps;
void init() {
	fill(isp + 2, isp + mn, true);
	for (int i = 2; i < mn; i++) {
		if (!isp[i])continue;
		ps.push_back(i);
		for (int j = 2 * i; j < mn; j += i) {
			isp[j] = false;
		}
	}
}*/

//[,val)
template<typename T>
auto prev_itr(set<T>& st, T val) {
	auto res = st.lower_bound(val);
	if (res == st.begin())return st.end();
	res--; return res;
}

//[val,)
template<typename T>
auto next_itr(set<T>& st, T val) {
	auto res = st.lower_bound(val);
	return res;
}
using mP = pair<modint, modint>;


int dx[4] = { 1,0,-1,0 };
int dy[4] = { 0,1,0,-1 };
//-----------------------------------------

void Z_algorithm(const vector<pair<char,int>>& s, vector<int>& a) {
	int sz = s.size();
	a.resize(sz);
	a[0] = sz;
	int i = 1, j = 0;
	while (i < sz) {
		while (i + j < sz && s[j] == s[i + j])++j;
		a[i] = j;
		if (j == 0) { ++i; continue; }
		int k = 1;
		while (i + k < sz && k + a[k] < j)a[i + k] = a[k], ++k;
		i += k; j -= k;
	}
}
void solve() {
	int n; cin >> n;
	vector<ll> a(n);
	rep(i, n)cin >> a[i];
	string s; cin >> s;
	modint ans = 0;
	rep(i, n) {
		if (s[0] == s[i]) {
			if (a[0] >= a[i]) {
				ans += a[i] * (a[i] + 1) / 2;
			}
			else {
				//1,...,a[0]
				ans += a[0] * (a[0] + 1) / 2;
				ans += a[0] * (a[i] - a[0]);
			}
		}
	}
	//cout << ans << "\n";
	vector<bool> can(n);
	rep(i, n - 1) {
		if (s[i] == s[0] && a[i] >= a[0])can[i + 1] = true;
	}
	if (n > 1) {
		vector<pair<char, int>> vp;
		for (int i = 1; i < n; i++)vp.push_back({ s[i],a[i] });
		vector<int> ra;
		Z_algorithm(vp, ra);
		vector<ll> num(n);
		rep(i, n - 1)num[i + 1] = num[i] + a[i+1];
		rep(i, n - 1) {
			if (can[i + 1]) {
				ll len = num[i + ra[i]] - num[i];
				if (i + ra[i] < n - 1) {
					if (s[1] == s[i + ra[i] + 1]) {
						len += min(a[1], a[i + ra[i] + 1]);
					}
				}
				ans += len;
			}
		}
	}
	cout << ans << "\n";
}

signed main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	//cout << fixed << setprecision(10);
	//init_f();
	//init();
	//while(true)
	//useexpr();
	//int t; cin >> t; rep(i, t)
	solve();
	return 0;
}

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