結果

問題 No.1848 Long Prefixes
ユーザー noya2noya2
提出日時 2023-03-30 23:28:22
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 34 ms / 2,000 ms
コード長 4,575 bytes
コンパイル時間 4,519 ms
コンパイル使用メモリ 270,072 KB
実行使用メモリ 10,304 KB
最終ジャッジ日時 2024-09-22 08:07:03
合計ジャッジ時間 7,440 ms
ジャッジサーバーID
(参考情報)
judge5 / judge2
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 34 ms
10,304 KB
testcase_01 AC 22 ms
10,176 KB
testcase_02 AC 34 ms
10,300 KB
testcase_03 AC 32 ms
10,176 KB
testcase_04 AC 21 ms
10,044 KB
testcase_05 AC 32 ms
9,896 KB
testcase_06 AC 29 ms
9,780 KB
testcase_07 AC 20 ms
9,804 KB
testcase_08 AC 31 ms
9,796 KB
testcase_09 AC 30 ms
9,920 KB
testcase_10 AC 23 ms
9,896 KB
testcase_11 AC 32 ms
10,000 KB
testcase_12 AC 30 ms
9,740 KB
testcase_13 AC 20 ms
9,964 KB
testcase_14 AC 32 ms
10,000 KB
testcase_15 AC 3 ms
6,940 KB
testcase_16 AC 2 ms
6,940 KB
testcase_17 AC 3 ms
6,944 KB
testcase_18 AC 2 ms
6,940 KB
testcase_19 AC 3 ms
6,940 KB
testcase_20 AC 1 ms
6,940 KB
testcase_21 AC 2 ms
6,940 KB
testcase_22 AC 2 ms
6,940 KB
testcase_23 AC 2 ms
6,940 KB
testcase_24 AC 2 ms
6,944 KB
testcase_25 AC 2 ms
6,944 KB
testcase_26 AC 2 ms
6,944 KB
testcase_27 AC 2 ms
6,940 KB
testcase_28 AC 1 ms
6,940 KB
testcase_29 AC 2 ms
6,944 KB
testcase_30 AC 2 ms
6,940 KB
testcase_31 AC 2 ms
6,944 KB
testcase_32 AC 2 ms
6,940 KB
testcase_33 AC 14 ms
6,940 KB
testcase_34 AC 18 ms
8,416 KB
testcase_35 AC 8 ms
6,940 KB
testcase_36 AC 13 ms
6,944 KB
testcase_37 AC 16 ms
7,652 KB
testcase_38 AC 18 ms
6,976 KB
testcase_39 AC 13 ms
6,944 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 #

#include<bits/stdc++.h>
#include<atcoder/all>
#define rep(i,n) for (int i = 0; i < int(n); ++i)
#define repp(i,n,m) for (int i = m; i < int(n); ++i)
#define reb(i,n) for (int i = int(n)-1; i >= 0; --i)
#define all(v) v.begin(),v.end()
using namespace std;
using namespace atcoder;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
using P = pair<int, int>;
using PL = pair<long long, long long>;
using pdd = pair<long double, long double>;
using pil = pair<int,ll>;
using pli = pair<ll,int>;
template<class T>istream &operator>>(istream &is,vector<T> &v){for(auto &e:v)is>>e;return is;}
template<typename T>bool range(T a,T b,T x){return (a<=x&&x<b);}
template<typename T>bool rrange(T a,T b,T c,T d,T x,T y){return (range(a,c,x)&&range(b,d,y));}
template<typename T> T rev(const T& str_or_vec){T res = str_or_vec; reverse(res.begin(),res.end()); return res; }
template<typename T>bool chmin(T &a,const T &b){if(a>b){a=b;return true;}return false;}
template<typename T>bool chmax(T &a,const T &b){if(a<b){a=b;return true;}return false;}
template<typename T>void uniq(vector<T> &v){sort(v.begin(),v.end());v.erase(unique(v.begin(),v.end()),v.end());}
template<typename T1, typename T2>void print(pair<T1,T2> a);
template<typename T>void print(vector<T> v);
template<typename T>void print(vector<vector<T>> v);
void print(){ putchar(' '); }
void print(bool a){ printf("%d", a); }
void print(int a){ printf("%d", a); }
void print(long a){ printf("%ld", a); }
void print(long long a){ printf("%lld", a); }
void print(char a){ printf("%c", a); }
void print(char a[]){ printf("%s", a); }
void print(const char a[]){ printf("%s", a); }
void print(long double a){ printf("%.15Lf", a); }
void print(const string& a){ for(auto&& i : a) print(i); }
void print(unsigned int a){ printf("%u", a); }
void print(unsigned long long a) { printf("%llu", a); }
template<class T> void print(const T& a){ cout << a; }
int out(){ putchar('\n'); return 0; }
template<class T> int out(const T& t){ print(t); putchar('\n'); return 0; }
template<class Head, class... Tail> int out(const Head& head, const Tail&... tail){ print(head); putchar(' '); out(tail...); return 0; }
template<typename T1,typename T2>void print(pair<T1,T2> a){print(a.first);print(),print(a.second);}
template<typename T>void print(vector<T> v){for(auto ite=v.begin();ite!=v.end();){print(*ite);if(++ite!=v.end())print();}}
template<typename T>void print(vector<vector<T>> v){for(auto ite=v.begin();ite!=v.end();){print(*ite);if(++ite!=v.end())out();}}
void yes(){out("Yes");}
void no (){out("No");}
void yn (bool t){if(t)yes();else no();}
void fast_io(){cin.tie(0); ios::sync_with_stdio(0); cout<<fixed<<setprecision(20);}
void o(){out("!?");}

namespace noya2{

const int INF = 1001001007;
const long long mod1 = 998244353;
const long long mod2 = 1000000007;
const long long inf = 2e18;
const long double pi = 3.14159265358979323;
const long double eps = 1e-7;
const vector<int> dx = {0,1,0,-1,1,1,-1,-1};
const vector<int> dy = {1,0,-1,0,1,-1,-1,1};
const string ALP = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
const string alp = "abcdefghijklmnopqrstuvwxyz";
const string NUM = "0123456789";

} // namespace noya2
using namespace noya2;

//using mint = modint998244353;
using mint = modint1000000007;
//using mint = modint;
void out(mint a){out(a.val());}
void out(vector<mint> a){vector<ll> b(a.size()); rep(i,a.size()) b[i] = a[i].val(); out(b);}
void out(vector<vector<mint>> a){for (auto v : a) out(v);}
istream &operator>>(istream &is,vector<mint> &v){for(auto &e:v){ll _x;is>>_x;e=_x;}return is;}


void solve(){
    int n; cin >> n;
    vector<ll> a(n); cin >> a;
    string s; cin >> s;
    if (n == 1){
        mint ans = a[0]*(a[0]+1)/2;
        out(ans);
        return ;
    }
    vector<ll> ap(n-1);
    rep(i,n-1) ap[i] = a[i+1];
    string sp = s.substr(1,n-1);
    auto za = z_algorithm(ap);
    auto zs = z_algorithm(sp);
    vector<ll> rui(n+1,0);
    rep(i,n) rui[i+1] = rui[i] + a[i];
    auto get = [&](int l, int r){
        return rui[r] - rui[l];
    };
    mint ans = 0;
    rep(i,n){
        if (s[i] != s[0]) continue;
        if (a[i] < a[0]){
            ans += a[i]*(a[i]+1)/2;
            continue;
        }
        ans += a[0]*(a[0]+1)/2;
        ans += (a[i]-a[0])*a[0];
        if (i == n-1) continue;
        int r = min(za[i],zs[i]);
        ans += get(i+1,i+r+1);
        if (i+r+1 == n) continue;
        if (zs[i] == r) continue;
        ans += min(a[i+1+r],a[1+r]);
    }
    out(ans);
}

int main(){
    fast_io();
    int t = 1; //cin >> t;
    while(t--) solve();
}
0