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QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#108864 | #6328. Many Products | 8BQube# | WA | 2147ms | 4296kb | C++14 | 3.4kb | 2023-05-26 20:00:46 | 2023-05-26 20:00:49 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
#define X first
#define Y second
#define ALL(v) v.begin(), v.end()
#define pb push_back
#define SZ(a) ((int)a.size())
const int MOD = 998244353;
const int L = 40;
void add(int &x, int val) {
x += val;
if (x >= MOD) x -= MOD;
}
int arr[200005];
int dp[2][L][L];
int C[5 * L][5 * L];
int H(int n, int m) {
if (n + m - 1 < m) return 0;
return C[n + m - 1][m];
}
int cal(const vector<int> &buk, int k) {
if (buk.empty()) return k == 0;
if (k == 0) return buk.empty();
int sum = 0;
for (int j : buk)
sum += j;
if (k > sum) return 0;
int res = 0;
for (int i = 0; i < k; ++i) {
int cur = 1;
for (int j : buk)
cur = (ll)cur * H(k - i, j) % MOD;
cur = (ll)cur * C[k][i] % MOD;
if (i & 1) add(res, MOD - cur);
else add(res, cur);
}
return res;
}
int main() {
ios::sync_with_stdio(0), cin.tie(0);
int n;
ll m;
cin >> n >> m;
for (int i = 1; i <= n; ++i)
cin >> arr[i];
C[0][0] = 1;
for (int i = 1; i < 5 * L; ++i) {
C[i][0] = 1;
for (int j = 1; j <= i; ++j) {
C[i][j] = C[i - 1][j];
add(C[i][j], C[i - 1][j - 1]);
}
}
vector<ll> p;
{
ll x = m;
for (ll i = 2; i * i <= x; ++i)
if (x % i == 0) {
p.pb(i);
while (x % i == 0) x /= i;
}
if (x > 1) p.pb(x);
}
vector<ll> fac;
for (ll i = 1; i * i <= m; ++i)
if (m % i == 0) {
fac.pb(i);
if (i * i != m) fac.pb(m / i);
}
dp[0][0][0] = 1;
int prv = 0, nxt = 1;
for (int i = 1; i <= n; ++i) {
memset(dp[nxt], 0, sizeof(dp[nxt]));
for (int j = 0; j < L; ++j)
for (int k = 0; k < L; ++k)
if (dp[prv][j][k]) {
add(dp[nxt][j + 1][k], dp[prv][j][k]);
add(dp[nxt][j][k + 1], (ll)dp[prv][j][k] * arr[i] % MOD);
add(dp[nxt][j][k], (ll)dp[prv][j][k] * (arr[i] + 1) % MOD);
}
swap(prv, nxt);
}
int ans = 0;
for (ll x : fac) {
vector<int> buk, ibuk;
for (ll j : p) {
ll cur = x;
if (cur % j == 0) {
buk.pb(0);
while (cur % j == 0) cur /= j, ++buk.back();
}
cur = m / x;
if (cur % j == 0) {
ibuk.pb(0);
while (cur % j == 0) cur /= j, ++ibuk.back();
}
}
vector<int> mth, imth;
for (int j = 0; j < L; ++j) {
mth.pb(cal(buk, j));
imth.pb(cal(ibuk, j));
}
int cur = 0;
for (int j = 0; j < L; ++j)
for (int k = 0; k < L; ++k) {
add(cur, (ll)dp[prv][j][k] % MOD * mth[j] % MOD * imth[k] % MOD);
}
add(ans, (ll)cur * (x % MOD) % MOD);
//cerr << x << ": " << cur << "\n";
}
vector<int> buk;
for (ll j : p) {
ll cur = m;
if (cur % j == 0) {
buk.pb(0);
while (cur % j == 0) cur /= j, ++buk.back();
}
}
int mul = 1;
for (int i = 1; i <= n; ++i)
mul = (ll)mul * arr[i] % MOD;
for (int k = 1; k < L; ++k)
add(ans, (ll)cal(buk, k) * mul % MOD);
if (m > 1) add(ans, MOD - mul);
cout << ans << "\n";
}
详细
Test #1:
score: 100
Accepted
time: 3ms
memory: 3608kb
input:
2 3 0 1
output:
10
result:
ok 1 number(s): "10"
Test #2:
score: 0
Accepted
time: 3ms
memory: 3488kb
input:
5 1 0 1 2 3 4
output:
120
result:
ok 1 number(s): "120"
Test #3:
score: 0
Accepted
time: 14ms
memory: 3532kb
input:
10 314159265358 0 1 2 3 4 5 6 7 8 9
output:
658270849
result:
ok 1 number(s): "658270849"
Test #4:
score: -100
Wrong Answer
time: 2147ms
memory: 4296kb
input:
200000 999999999989 823489320 406308599 710963770 183707427 192930969 941365774 318564299 391028855 945374838 651744270 515755727 220857626 599403217 214957584 335628890 771694833 40989299 34892948 630275822 869708185 432704750 924850167 707864789 232688853 406616372 529994171 782650336 979286144 65...
output:
54531740
result:
wrong answer 1st numbers differ - expected: '777405593', found: '54531740'