QOJ.ac
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 |
---|---|---|---|---|---|---|---|---|---|
#74270 | #3161. Another Coin Weighing Puzzle | StarSilk | WA | 317ms | 8684kb | C++14 | 866b | 2023-01-31 12:43:01 | 2023-01-31 12:43:03 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
long long mod=998244353;
long long qpow(long long a,long long b){
long long ans=1;
while(b>0)
{
if(b&1)ans=ans*a%mod;
a=a*a%mod;
b>>=1;
}
return ans;
}
bool ntprime[1000001]={};
int prime[100000],pricnt=0,N=1000000,val[1000000]={};
void gen(){
int i,j;
ntprime[1]=1;
val[1]=1;
for(i=2;i<=N;i++)
{
if(!ntprime[i])
{
prime[pricnt]=i;
val[i]=-1;
pricnt++;
}
for(j=0;j<pricnt&&i*prime[j]<=N;j++)
{
ntprime[i*prime[j]]=1;
if(i%prime[j]==0)break;
else val[i*prime[j]]=val[i]*val[prime[j]];
}
}
}
int main(int argc, char** argv) {
ios::sync_with_stdio(false),cin.tie(0);
int m,k,i,j;
long long ans=0;
gen();
cin>>m>>k;
for(i=1;i<=k;i++)ans=(ans+val[i]*((qpow(k/i*2+1,m)+mod-1)%mod)+mod)%mod;
cout<<(ans+1)%mod<<'\n';
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 7ms
memory: 8568kb
input:
2 1
output:
9
result:
ok single line: '9'
Test #2:
score: 0
Accepted
time: 3ms
memory: 8496kb
input:
2 2
output:
17
result:
ok single line: '17'
Test #3:
score: 0
Accepted
time: 11ms
memory: 8680kb
input:
10000 10000
output:
689223145
result:
ok single line: '689223145'
Test #4:
score: 0
Accepted
time: 8ms
memory: 8660kb
input:
9999 31
output:
986106162
result:
ok single line: '986106162'
Test #5:
score: 0
Accepted
time: 4ms
memory: 8508kb
input:
57 9817
output:
447253096
result:
ok single line: '447253096'
Test #6:
score: 0
Accepted
time: 11ms
memory: 8452kb
input:
501 499
output:
247755220
result:
ok single line: '247755220'
Test #7:
score: 0
Accepted
time: 58ms
memory: 8656kb
input:
97424 174829
output:
964884269
result:
ok single line: '964884269'
Test #8:
score: 0
Accepted
time: 12ms
memory: 8512kb
input:
11 13
output:
729153057
result:
ok single line: '729153057'
Test #9:
score: 0
Accepted
time: 62ms
memory: 8492kb
input:
200000 200000
output:
803771125
result:
ok single line: '803771125'
Test #10:
score: 0
Accepted
time: 5ms
memory: 8660kb
input:
199999 562
output:
865836540
result:
ok single line: '865836540'
Test #11:
score: 0
Accepted
time: 42ms
memory: 8540kb
input:
3539 189423
output:
530738158
result:
ok single line: '530738158'
Test #12:
score: 0
Accepted
time: 59ms
memory: 8456kb
input:
198324 173852
output:
963717515
result:
ok single line: '963717515'
Test #13:
score: 0
Accepted
time: 7ms
memory: 8624kb
input:
1 1
output:
3
result:
ok single line: '3'
Test #14:
score: -100
Wrong Answer
time: 317ms
memory: 8684kb
input:
1000000 1000000
output:
421700531
result:
wrong answer 1st lines differ - expected: '800590912', found: '421700531'