結果
| 問題 |
No.444 旨味の相乗効果
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2024-12-22 17:58:26 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 281 ms / 2,500 ms |
| コード長 | 2,482 bytes |
| コンパイル時間 | 3,988 ms |
| コンパイル使用メモリ | 190,472 KB |
| 実行使用メモリ | 5,248 KB |
| 最終ジャッジ日時 | 2024-12-22 17:58:33 |
| 合計ジャッジ時間 | 4,499 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 5 |
| other | AC * 23 |
ソースコード
#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/hash_policy.hpp>
#define Add(x, y) (x + y >= mod) ? (x + y - mod) : (x + y)
#define lowbit(x) x & (-x)
#define pi pair<ll, ll>
#define pii pair<ll, pair<ll, ll>>
#define iip pair<pair<ll, ll>, ll>
#define ppii pair<pair<ll, ll>, pair<ll, ll>>
#define ls(k) k << 1
#define rs(k) k << 1 | 1
#define fi first
#define se second
#define full(l, r, x) for(auto it = l; it != r; ++it) (*it) = x
#define Full(a) memset(a, 0, sizeof(a))
#define open(s1, s2) freopen(s1, "r", stdin), freopen(s2, "w", stdout);
#define For(i, l, r) for(register int i = l; i <= r; ++i)
#define _For(i, l, r) for(register int i = r; i >= l; --i)
using namespace std;
using namespace __gnu_pbds;
typedef double db;
typedef unsigned long long ull;
typedef long long ll;
bool Begin;
const int N = 81, M = 1e4 + 10, mod = 1e9 + 7;
inline ll read(){
ll x = 0, f = 1;
char c = getchar();
while(c < '0' || c > '9'){
if(c == '-')
f = -1;
c = getchar();
}
while(c >= '0' && c <= '9'){
x = (x << 1) + (x << 3) + (c ^ 48);
c = getchar();
}
return x * f;
}
inline void write(ll x){
if(x < 0){
putchar('-');
x = -x;
}
if(x > 9)
write(x / 10);
putchar(x % 10 + '0');
}
class Matrix{
public:
int n, m;
int a[N][N];
inline Matrix(){
memset(a, 0, sizeof(a));
}
inline int* operator[](int x){
return a[x];
}
inline friend Matrix operator*(Matrix A, Matrix B){
Matrix ans;
ans.n = A.n, ans.m = B.m;
for(int i = 1; i <= A.n; ++i)
for(int j = 1; j <= B.m; ++j)
for(int k = 1; k <= A.m; ++k)
ans[i][j] = (ans[i][j] + 1ll * A[i][k] * B[k][j] % mod) % mod;
return ans;
}
}now, base, t;
ll c;
int n, sum;
int a[N];
inline int qpow(int a, ll b){
int ans = 1;
while(b){
if(b & 1ll)
ans = (1ll * ans * a) % mod;
a = (1ll * a * a) % mod;
b >>= 1ll;
}
return ans;
}
inline Matrix qpow(Matrix a, ll b){
Matrix ans = a;
--b;
while(b){
if(b & 1ll)
ans = ans * a;
a = a * a;
b >>= 1ll;
}
return ans;
}
bool End;
int main(){
n = read(), c = read();
for(int i = 1; i <= n; ++i){
a[i] = read();
sum = (sum + qpow(a[i], c)) % mod;
}
now.n = base.n = base.m = n, now.m = 1;
for(int i = 1; i <= n; ++i){
now[i][1] = 1;
for(int j = 1; j <= i; ++j)
base[i][j] = a[j];
}
now = qpow(base, c) * now;
write((now[n][1] - sum + mod) % mod);
cerr << '\n' << abs(&Begin - &End) / 1048576 << "MB";
return 0;
}