QOJ.ac
QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #277216 | #7046. Function! | zzuqy# | WA | 2ms | 3604kb | C++11 | 569b | 2023-12-06 16:41:54 | 2023-12-06 16:41:55 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
ll mod=998244353;
ll quick(ll x,ll y)
{
ll t=1;
while(y)
{
if(y&1)
t=t*x%mod;
x=x*x%mod;
y=y/2;
}
return t;
}
ll n,ans;
ll ask(ll x)
{
x=(1+x)*x%mod*quick(2,mod-2)%mod*(n+1)%mod-(x+1)*x%mod*(x*2+1)%mod*quick(6,mod-2)%mod;
x=(x%mod+mod)%mod;
return x;
}
int main()
{
cin>>n;
ll i;
for(i=2;i*i<=n;i++)
{
ll j=i;
while(j<=n)
{
ans=(ans+i*(n-j+1))%mod;
j=j*i;
}
}
ans=ans+ask(n)-ask(i-1);
ans=(ans%mod+mod)%mod;
cout<<ans;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3372kb
input:
2
output:
2
result:
ok 1 number(s): "2"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3604kb
input:
10
output:
236
result:
ok 1 number(s): "236"
Test #3:
score: 0
Accepted
time: 1ms
memory: 3364kb
input:
20
output:
1646
result:
ok 1 number(s): "1646"
Test #4:
score: 0
Accepted
time: 1ms
memory: 3480kb
input:
27
output:
3862
result:
ok 1 number(s): "3862"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3380kb
input:
37
output:
9571
result:
ok 1 number(s): "9571"
Test #6:
score: 0
Accepted
time: 0ms
memory: 3360kb
input:
100
output:
175028
result:
ok 1 number(s): "175028"
Test #7:
score: 0
Accepted
time: 0ms
memory: 3556kb
input:
123
output:
322744
result:
ok 1 number(s): "322744"
Test #8:
score: 0
Accepted
time: 0ms
memory: 3544kb
input:
2548
output:
765669726
result:
ok 1 number(s): "765669726"
Test #9:
score: 0
Accepted
time: 0ms
memory: 3564kb
input:
12448
output:
159637196
result:
ok 1 number(s): "159637196"
Test #10:
score: 0
Accepted
time: 0ms
memory: 3372kb
input:
65535
output:
120089112
result:
ok 1 number(s): "120089112"
Test #11:
score: 0
Accepted
time: 1ms
memory: 3552kb
input:
102458
output:
475774506
result:
ok 1 number(s): "475774506"
Test #12:
score: 0
Accepted
time: 0ms
memory: 3368kb
input:
222333
output:
64337543
result:
ok 1 number(s): "64337543"
Test #13:
score: 0
Accepted
time: 0ms
memory: 3432kb
input:
485174
output:
312492357
result:
ok 1 number(s): "312492357"
Test #14:
score: 0
Accepted
time: 0ms
memory: 3432kb
input:
685479
output:
35530508
result:
ok 1 number(s): "35530508"
Test #15:
score: 0
Accepted
time: 0ms
memory: 3476kb
input:
1025481
output:
921523794
result:
ok 1 number(s): "921523794"
Test #16:
score: 0
Accepted
time: 0ms
memory: 3368kb
input:
9999999
output:
732610409
result:
ok 1 number(s): "732610409"
Test #17:
score: 0
Accepted
time: 1ms
memory: 3476kb
input:
7458658
output:
825346623
result:
ok 1 number(s): "825346623"
Test #18:
score: 0
Accepted
time: 0ms
memory: 3600kb
input:
5268475
output:
30938162
result:
ok 1 number(s): "30938162"
Test #19:
score: 0
Accepted
time: 0ms
memory: 3364kb
input:
2658478
output:
780038100
result:
ok 1 number(s): "780038100"
Test #20:
score: 0
Accepted
time: 0ms
memory: 3600kb
input:
10000000
output:
679483439
result:
ok 1 number(s): "679483439"
Test #21:
score: 0
Accepted
time: 1ms
memory: 3432kb
input:
100000000
output:
498142384
result:
ok 1 number(s): "498142384"
Test #22:
score: 0
Accepted
time: 1ms
memory: 3556kb
input:
1000000000
output:
69187994
result:
ok 1 number(s): "69187994"
Test #23:
score: -100
Wrong Answer
time: 2ms
memory: 3472kb
input:
10000000000
output:
362892568
result:
wrong answer 1st numbers differ - expected: '23566211', found: '362892568'