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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 |
---|---|---|---|---|---|---|---|---|---|
#738681 | #9619. 乘积,欧拉函数,求和 | qstbcd | WA | 39ms | 5156kb | C++23 | 1.8kb | 2024-11-12 19:42:19 | 2024-11-12 19:42:20 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
#define int long long
const int N = 2e5 + 5;
const int mod = 998244353;
int __t = 1, n;
int prime[20] = {2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 1};
void solve() {
map<int, vector<pair<int, int>>> mp;
cin >> n;
for (int i = 1; i <= n; i++) {
int x;
cin >> x;
int nd = 0, sum = 1;
for (int i = 0; i < 16; i++) {
while (x % prime[i] == 0) {
x /= prime[i];
if ((nd & (1 << i)) == 1)
sum = (sum * prime[i]) % mod;
nd |= (1 << i);
}
}
mp[x].push_back({nd, sum});
}
vector<int> dp(1 << 17);
dp[0] = 1;
for (auto [x, vec] : mp) {
prime[16] = x;
for (auto [nd, sum] : vec) {
if (x != 1)
nd |= 1 << 16;
auto ndp = dp;
for (int i = 0; i < (1 << 17); i++) {
int nsum = sum, nnd = nd | i;
for (int j = 0; j < 17; j++) {
if ((i & (1 << j)) == 0 && (nd & (1 << j)) != 0) {
nsum = (nsum * max(prime[j] - 1, 1ll)) % mod;
}
}
ndp[nnd] = (ndp[nnd] + dp[i] * nsum % mod) % mod;
}
swap(dp, ndp);
}
for (int i = (1 << 16); i < (1 << 17); i++) {
int ni = i ^ (1 << 16);
dp[ni] = (dp[ni] + dp[i]) % mod;
dp[i] = 0;
}
}
int sum = 0;
for (auto i : dp) {
sum = (sum + i) % mod;
}
cout << sum << '\n';
return;
}
int32_t main() {
#ifdef ONLINE_JUDGE
ios::sync_with_stdio(false);
cin.tie(0);
#endif
// cin >> __t;
while (__t--)
solve();
return 0;
}
详细
Test #1:
score: 0
Wrong Answer
time: 39ms
memory: 5156kb
input:
5 1 6 8 6 2
output:
140
result:
wrong answer 1st lines differ - expected: '892', found: '140'