Submission #67558918

Source Code Expand

#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;

const ll md = 998244353LL;

ll pw(ll x, ll p){
    if(p == 0) return 1;
    if(p&1) return (pw(x, p-1)*x)%md;
    return pw((x*x)%md, p/2);
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    ll n; cin >> n;
    ll ans = (n-1)%md;
    ans*=(n%md);
    ans%=md;
    ans*=pw(2, md-2); // /=2
    ans%=md;

    for(ll i = 1; i*i <= n; i++){
        ans-=(n/i)%md;
        ans%=md;

        if(i*i == n){
            continue;
        }

        ll x = i;
        if(i > 1 && ll(n/(i-1)) == n/i) continue;
        x%=md;
        if((i+1)*(i+1) <= n) x*=((n/i)%md-(n/(i+1))%md)%md, x%=md;
        ans-=x;
        ans%=md;
    }

    ans+=n%md;
    ans%=md;
    if(ans < 0) ans+=md;
    cout << ans << "\n";
}

Submission Info

Submission Time
Task E - Count A%B=C
User Jarif_Rahman
Language C++ 20 (gcc 12.2)
Score 0
Code Size 835 Byte
Status WA
Exec Time 11 ms
Memory 3596 KiB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 0 / 475
Status
AC × 2
WA × 1
AC × 33
WA × 23
Set Name Test Cases
Sample 00-sample-01.txt, 00-sample-02.txt, 00-sample-03.txt
All 00-sample-01.txt, 00-sample-02.txt, 00-sample-03.txt, 01-01.txt, 01-02.txt, 01-03.txt, 01-04.txt, 01-05.txt, 01-06.txt, 01-07.txt, 01-08.txt, 01-09.txt, 01-10.txt, 01-11.txt, 01-12.txt, 01-13.txt, 01-14.txt, 01-15.txt, 01-16.txt, 01-17.txt, 01-18.txt, 01-19.txt, 01-20.txt, 01-21.txt, 01-22.txt, 01-23.txt, 01-24.txt, 01-25.txt, 01-26.txt, 01-27.txt, 01-28.txt, 01-29.txt, 01-30.txt, 01-31.txt, 01-32.txt, 01-33.txt, 01-34.txt, 01-35.txt, 01-36.txt, 01-37.txt, 01-38.txt, 01-39.txt, 01-40.txt, 01-41.txt, 01-42.txt, 01-43.txt, 01-44.txt, 01-45.txt, 01-46.txt, 01-47.txt, 01-48.txt, 01-49.txt, 01-50.txt, 01-51.txt, 01-52.txt, 01-53.txt
Case Name Status Exec Time Memory
00-sample-01.txt AC 1 ms 3588 KiB
00-sample-02.txt AC 1 ms 3508 KiB
00-sample-03.txt WA 7 ms 3508 KiB
01-01.txt WA 1 ms 3484 KiB
01-02.txt AC 1 ms 3592 KiB
01-03.txt WA 1 ms 3412 KiB
01-04.txt AC 1 ms 3428 KiB
01-05.txt AC 1 ms 3512 KiB
01-06.txt WA 1 ms 3596 KiB
01-07.txt WA 1 ms 3428 KiB
01-08.txt AC 1 ms 3408 KiB
01-09.txt AC 1 ms 3428 KiB
01-10.txt AC 1 ms 3448 KiB
01-11.txt WA 1 ms 3488 KiB
01-12.txt AC 1 ms 3592 KiB
01-13.txt WA 1 ms 3588 KiB
01-14.txt WA 1 ms 3388 KiB
01-15.txt AC 11 ms 3504 KiB
01-16.txt WA 10 ms 3428 KiB
01-17.txt AC 11 ms 3424 KiB
01-18.txt AC 11 ms 3512 KiB
01-19.txt WA 11 ms 3448 KiB
01-20.txt WA 10 ms 3504 KiB
01-21.txt WA 10 ms 3504 KiB
01-22.txt WA 11 ms 3472 KiB
01-23.txt WA 10 ms 3564 KiB
01-24.txt AC 10 ms 3400 KiB
01-25.txt AC 10 ms 3440 KiB
01-26.txt AC 10 ms 3408 KiB
01-27.txt AC 10 ms 3368 KiB
01-28.txt AC 1 ms 3408 KiB
01-29.txt AC 1 ms 3504 KiB
01-30.txt AC 1 ms 3448 KiB
01-31.txt WA 1 ms 3580 KiB
01-32.txt AC 1 ms 3512 KiB
01-33.txt AC 1 ms 3504 KiB
01-34.txt AC 1 ms 3384 KiB
01-35.txt WA 1 ms 3424 KiB
01-36.txt AC 1 ms 3504 KiB
01-37.txt AC 1 ms 3448 KiB
01-38.txt AC 1 ms 3412 KiB
01-39.txt AC 1 ms 3440 KiB
01-40.txt AC 1 ms 3576 KiB
01-41.txt WA 2 ms 3432 KiB
01-42.txt AC 7 ms 3380 KiB
01-43.txt WA 8 ms 3472 KiB
01-44.txt WA 3 ms 3480 KiB
01-45.txt WA 10 ms 3512 KiB
01-46.txt AC 4 ms 3472 KiB
01-47.txt WA 1 ms 3596 KiB
01-48.txt WA 5 ms 3448 KiB
01-49.txt AC 2 ms 3516 KiB
01-50.txt AC 7 ms 3468 KiB
01-51.txt AC 7 ms 3384 KiB
01-52.txt AC 2 ms 3428 KiB
01-53.txt WA 9 ms 3508 KiB