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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#738715#9619. 乘积,欧拉函数,求和qstbcdTL 42ms5172kbC++232.1kb2024-11-12 19:46:492024-11-12 19:46:50

Judging History

你现在查看的是最新测评结果

  • [2024-11-12 19:46:50]
  • 评测
  • 测评结果:TL
  • 用时:42ms
  • 内存:5172kb
  • [2024-11-12 19:46:49]
  • 提交

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});
    }
    // for (auto [x, vec] : mp) {
    //     for (auto [nd, sum] : vec) {
    //         cout << x << ' ' << nd << ' ' << sum << '\n';
    //     }
    // }
    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;
                    }
                    if ((i & (1 << j)) != 0 && (nd & (1 << j)) != 0) {
                        nsum = (nsum * prime[j]) % 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;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 38ms
memory: 5172kb

input:

5
1 6 8 6 2

output:

892

result:

ok single line: '892'

Test #2:

score: 0
Accepted
time: 42ms
memory: 5160kb

input:

5
3 8 3 7 8

output:

3157

result:

ok single line: '3157'

Test #3:

score: -100
Time Limit Exceeded

input:

2000
79 1 1 1 1 1 1 2803 1 1 1 1 1 1 1609 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2137 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 613 1 499 1 211 1 2927 1 1 1327 1 1 1123 1 907 1 2543 1 1 1 311 2683 1 1 1 1 2963 1 1 1 641 761 1 1 1 1 1 1 1 1 1 1 1 1489 2857 1 1 1 1 1 1 1 1 1 1 1 1 1 967 1 821 1 1 1 1 2143 1861...

output:


result: