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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#244749#4478. Jo loves countingucup-team203AC ✓748ms37148kbC++202.5kb2023-11-09 15:19:412023-11-09 15:19:42

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你现在查看的是最新测评结果

  • [2023-11-09 15:19:42]
  • 评测
  • 测评结果:AC
  • 用时:748ms
  • 内存:37148kb
  • [2023-11-09 15:19:41]
  • 提交

answer

#include <bits/stdc++.h>
const int N = 2e6 + 10;
using namespace std;
#define ll __int128_t
const ll Mod = (1ll << 57) * 29ll + 1;
ll Pow(ll n, ll k)
{
    ll res = 1;
    for (ll x = n; k; x = x * x % Mod, k >>= 1)
        if (k & 1)
            res = res * x % Mod;
    return res;
}
ll isp[N], p[N], tot;
ll M;
ll ans = 0, inv2;
ll inv[100];
struct node
{
    /* data */
    ll now, pos, h;
};

void calc()
{

    stack<node> st;
    st.push((node){1, 0, 1});
    while (!st.empty())
    {
        node tmp = st.top();
        st.pop();
        ll now = tmp.now, pos = tmp.pos, h = tmp.h;

        // printf("%lld %lld %lld\n",(long long) pos,(long long) M,(long long) p[pos]*p[pos]);
        if (p[pos] * p[pos] > M / now)
        {
            if (now == 1)
            {
                ans += (M * (M + 1) % Mod * inv2) % Mod;
                ans%=Mod;
            }
            else
            {

                ans += now * h % Mod * (M / now) % Mod * (M / now + 1) % Mod * inv2 % Mod;
                ans = (ans % Mod + Mod) % Mod;
                // printf("%lld %lld\n",(long long)now,(long long)(h>0?1:-1)*now*Pow(abs(h),Mod-2)%Mod);
            }
            // printf("%lld\n",(long long)ans);
            continue;
        }
        // calc(now, pos + 1, h);
        if (p[pos] * p[pos] > M / now)
            continue;
        st.push((node){now, pos + 1, h});
        // if(p[pos]==0)
        // {
        //     printf("%lld"p[pos-1]);
        // }
        for (ll i = 2, pj = p[pos] * p[pos]; now <= M / pj; i++, pj *= p[pos])
        {
            // calc(now * pj, pos + 1, h * (-i * (i - 1)));
            st.push((node){now * pj, pos + 1, h * inv[i] % (ll)Mod});
        }
    }
}
void solve()
{
    long long _;
    cin >> _;
    M = _;
    ans=0;
    calc();
    ans = ans * Pow(M, Mod - 2) % Mod;
    printf("%lld\n", (long long)ans);
}
int main()
{
    inv2 = Pow(2, Mod - 2);
    for (int i = 1; i < 100; i++)
        inv[i] = -Pow(i * (i - 1), Mod - 2);
    for (int i = 2; i <= N - 10; i++)
    {
        if (!isp[i])
            p[tot++] = i;
        for (int j = 0; i * p[j] < N && j < tot; j++)
        {
            isp[i * p[j]] = 1;
            if (i % p[j])
                ;
            else
                break;
        }
    }
    int T;
    cin >> T;
    while (T--)
    {
        solve();
    }
}
/*
12
4
959139
9859
125987
209411
965585325539
213058376259
451941492387
690824608515
934002691939
1000000000000
1
*/

Details

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Test #1:

score: 100
Accepted
time: 748ms
memory: 37148kb

input:

12
4
959139
9859
125987
209411
965585325539
213058376259
451941492387
690824608515
934002691939
1000000000000
1

output:

2
2544652967005436170
1531132428015608197
4112905740393076193
2210911161352244432
3734327250979959061
3166689602614938339
2205751131915532448
1440445581699720020
350511728590182760
1099683734530790325
1

result:

ok 12 lines