QOJ.ac
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 |
---|---|---|---|---|---|---|---|---|---|
#777014 | #9619. 乘积,欧拉函数,求和 | ewe | WA | 12ms | 5808kb | C++14 | 3.2kb | 2024-11-23 22:13:54 | 2024-11-23 22:13:54 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
#define fopen \
freopen("E:/vscode/oi/in.txt", "r", stdin); \
freopen("E:/vscode/oi/out.txt", "w", stdout);
#define ios \
ios::sync_with_stdio(0); \
cin.tie(0);
#define i64 long long
#define ull unsigned i64
#define pii pair<int, int>
#define pdd pair<double, double>
#define ld long double
#define ls(x) (x << 1)
#define rs(x) (x << 1 | 1)
#define lowbit(x) (x & -x)
#define de(x) cout << #x << " = " << x << '\n'
#define MAXP 20
const int N = 2e3 + 10, M = 3e3 + 10, mod = 998244353;
const double eps = 1e-12;
const double PI = acos(-1);
bool Mst;
#define int i64
const int pri[16] = {2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53};
vector<array<int, 2>> vec[M];
int qsm(int a, int b)
{
int res = 1;
while (b)
{
if (b & 1)
res = res * a % mod;
a = a * a % mod;
b >>= 1;
}
return res;
}
int calc(int p)
{
return (p - 1) * qsm(p, mod - 2) % mod;
}
void solve()
{
int n;
cin >> n;
for (int id = 0; id < n; id++)
{
int x;
cin >> x;
int mask = 0, val = x;
for (int i = 0; i < 16; i++)
{
int p = pri[i];
if (x % p == 0)
{
while (x % p == 0)
x /= p;
mask |= 1 << i;
}
}
vec[x].push_back({mask, val});
}
vector<int> dp(1 << 17, 0);
vector<int> f(1 << 16), g(16);
for (int i = 0; i < 16; i++)
g[i] = calc(pri[i]);
for (int x = 0; x < (1 << 16); x++)
{
f[x] = 1;
for (int i = 0; i < 16; i++)
if (x >> i & 1)
f[x] = f[x] * g[i] % mod;
}
int ans = 0;
dp[0] = 1;
for (int p = 1; p < M; p++)
{
if (vec[p].empty())
continue;
int maxp = calc(p);
for (auto [mask, val] : vec[p])
{
auto ndp = dp;
if (p > 1)
mask |= 1 << 16;
for (int i = 0; i < (1 << 17); i++)
{
int j = i | mask, k = j ^ i;
int res = dp[i] * val % mod;
if (k >> 16 & 1)
{
res = res * maxp % mod;
k ^= 1 << 16;
}
assert(k < (1 << 16));
res = res * f[k] % mod;
ndp[j] = (ndp[j] + res) % mod;
}
dp = ndp;
int ans = 0;
for (auto x : dp)
ans = (ans + x) % mod;
cout << ans << '\n';
}
for (int i = 1 << 16; i < (1 << 17); i++)
{
ans = (ans + dp[i]) % mod;
dp[i] = 0;
}
}
for (auto x : dp)
ans = (ans + x) % mod;
cout << ans << '\n';
}
bool Med;
signed main()
{
ios;
// fopen;
cerr << (&Med - &Mst) / 1024 / 1024;
int t = 1;
srand(time(0));
cout << fixed << setprecision(12);
// cin >> t;
for (int i = 1; i <= t; i++)
{
solve();
}
return 0;
}
详细
Test #1:
score: 0
Wrong Answer
time: 12ms
memory: 5808kb
input:
5 1 6 8 6 2
output:
2 6 46 298 892 892
result:
wrong answer 1st lines differ - expected: '892', found: '2'