結果
| 問題 |
No.995 タピオカオイシクナーレ
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2020-03-04 22:18:25 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 15 ms / 2,000 ms |
| コード長 | 3,898 bytes |
| コンパイル時間 | 1,177 ms |
| コンパイル使用メモリ | 116,096 KB |
| 実行使用メモリ | 5,248 KB |
| 最終ジャッジ日時 | 2024-10-14 00:34:17 |
| 合計ジャッジ時間 | 2,731 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 23 |
ソースコード
#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <queue>
#include <string>
#include <map>
#include <set>
#include <tuple>
#include <deque>
#include <numeric>
#include <bitset>
#include <iomanip>
#include <cassert>
#include <chrono>
#include <random>
#include <limits>
#include <iterator>
#include <functional>
#include <sstream>
#include <complex>
using namespace std;
typedef long long ll;
typedef pair<int, int> P;
typedef pair<int, double> Pid;
typedef pair<double, int> Pdi;
typedef pair<ll, int> Pl;
typedef pair<int, pair<int, int>> PP;
constexpr double PI = 3.1415926535897932; // acos(-1)
constexpr double EPS = 1e-15;
constexpr int INF = 1001001001;
constexpr int mod = 1e+9 + 7;
#define chmax(x, y) x = max(x, y)
#define chmin(x, y) x = min(x, y)
#define chadd(x, y) x = (x + y) % mod
template<int mod>
struct ModInt{
int x;
ModInt() : x(0) {}
ModInt(int64_t y) : x(y >= 0 ? y % mod : (mod - (-y) % mod) % mod) {}
ModInt &operator+=(const ModInt &p){
if((x += p.x) >= mod) x -= mod;
return *this;
}
ModInt &operator-=(const ModInt &p){
if((x += mod - p.x) >= mod) x -= mod;
return *this;
}
ModInt &operator*=(const ModInt &p){
x = (int)(1LL * x * p.x % mod);
return *this;
}
ModInt &operator/=(const ModInt &p){
*this *= p.inverse();
return *this;
}
ModInt operator-() const {return ModInt(-x);}
ModInt operator+(const ModInt &p) const {return ModInt(*this) += p;}
ModInt operator-(const ModInt &p) const {return ModInt(*this) -= p;}
ModInt operator*(const ModInt &p) const {return ModInt(*this) *= p;}
ModInt operator/(const ModInt &p) const {return ModInt(*this) /= p;}
bool operator==(const ModInt &p) const {return x == p.x;}
bool operator!=(const ModInt &p) const {return x != p.x;}
ModInt inverse() const{
int a = x, b = mod, u = 1, v = 0, t;
while(b > 0){
t = a / b;
swap(a -= t * b, b);
swap(u -= t * v, v);
}
return ModInt(u);
}
ModInt pow(int64_t n) const{
ModInt ret(1), mul(x);
while(n > 0){
if(n & 1) ret *= mul;
mul *= mul;
n >>= 1;
}
return ret;
}
friend ostream &operator<<(ostream &os, const ModInt &p){
return os << p.x;
}
friend istream &operator>>(istream &is, ModInt &a){
int64_t t;
is >> t;
a = ModInt<mod>(t);
return (is);
}
static int get_MOD() {return mod;}
};
using modint = ModInt<mod>;
using vec = vector<modint>;
using mat = vector<vec>;
mat mul(const mat& A, const mat& B){
mat res = mat(A.size(), vec(B[0].size(), 0));
for(int i = 0; i < A.size(); ++i){
for(int k = 0; k < B.size(); ++k){
for(int j = 0; j < B[0].size(); ++j){
res[i][j] += A[i][k] * B[k][j];
}
}
}
return res;
}
mat pow(mat A, ll n){
mat res = mat(A.size(), vec(A[0].size(), 0));
for(int i = 0; i < A.size(); ++i) res[i][i] = 1;
while(n > 0){
if(n & 1) res = mul(res, A);
A = mul(A, A);
n >>= 1;
}
return res;
}
int main(){
ios::sync_with_stdio(false);
cin.tie(nullptr);
int n, m;
ll k;
modint p, q;
cin >> n >> m >> k >> p >> q;
vector<modint> b(n);
for(int i = 0; i < n; ++i) cin >> b[i];
mat P = mat(2, vec(2));
P[0][0] = (modint)1 - p * q.inverse();
P[1][1] = P[0][0];
P[0][1] = p * q.inverse();
P[1][0] = P[0][1];
P = pow(P, k);
modint p0 = P[0][0];
modint p1 = P[0][1];
modint res = 0;
for(int i = 0; i < n; ++i){
if(i < m){
res += b[i] * p0;
}
else{
res += b[i] * p1;
}
}
cout << res << endl;
}