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 |
|---|---|---|---|---|---|---|---|---|---|
| #461708 | #8833. Equalizer Ehrmantraut | Purslane | AC ✓ | 412ms | 3668kb | C++14 | 642b | 2024-07-02 23:22:41 | 2024-07-02 23:22:42 |
Judging History
answer
#include<bits/stdc++.h>
#define int long long
#define ffor(i,a,b) for(int i=(a);i<=(b);i++)
#define roff(i,a,b) for(int i=(a);i>=(b);i--)
using namespace std;
const int MOD=998244353;
int qpow(int base,int p) {
int ans=1;
while(p) {
if(p&1) ans=ans*base%MOD;
base=base*base%MOD,p>>=1;
}
return ans;
}
int n,m,ans;
signed main() {
ios::sync_with_stdio(false),cin.tie(0),cout.tie(0);
cin>>n>>m;
ffor(j,0,m-1) {
ans=(ans-(qpow(j+1,n)-qpow(j,n)))%MOD;
int inv=qpow(m-j,MOD-2);
ans=(ans+2*qpow(m-j,n)%MOD*((qpow(j*inv%MOD+1,n)-qpow(j*inv%MOD,n))%MOD)%MOD)%MOD;
}
cout<<(ans%MOD+MOD)%MOD;
return 0;
}
这程序好像有点Bug，我给组数据试试？
详细
Test #1:
score: 100
Accepted
time: 1ms
memory: 3496kb
input:
1 3
output:
9
result:
ok 1 number(s): "9"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3548kb
input:
2 2
output:
10
result:
ok 1 number(s): "10"
Test #3:
score: 0
Accepted
time: 1ms
memory: 3652kb
input:
69 42
output:
608932821
result:
ok 1 number(s): "608932821"
Test #4:
score: 0
Accepted
time: 1ms
memory: 3536kb
input:
102 156
output:
748401290
result:
ok 1 number(s): "748401290"
Test #5:
score: 0
Accepted
time: 25ms
memory: 3564kb
input:
4646 95641
output:
89806680
result:
ok 1 number(s): "89806680"
Test #6:
score: 0
Accepted
time: 67ms
memory: 3564kb
input:
42849 215151
output:
242217237
result:
ok 1 number(s): "242217237"
Test #7:
score: 0
Accepted
time: 341ms
memory: 3580kb
input:
786416 794116
output:
472898000
result:
ok 1 number(s): "472898000"
Test #8:
score: 0
Accepted
time: 328ms
memory: 3544kb
input:
963852 789456
output:
353211048
result:
ok 1 number(s): "353211048"
Test #9:
score: 0
Accepted
time: 172ms
memory: 3656kb
input:
696969 424242
output:
787990158
result:
ok 1 number(s): "787990158"
Test #10:
score: 0
Accepted
time: 52ms
memory: 3568kb
input:
1000000 123456
output:
533491028
result:
ok 1 number(s): "533491028"
Test #11:
score: 0
Accepted
time: 412ms
memory: 3596kb
input:
1000000 1000000
output:
572586375
result:
ok 1 number(s): "572586375"
Test #12:
score: 0
Accepted
time: 358ms
memory: 3552kb
input:
123456 1000000
output:
486967129
result:
ok 1 number(s): "486967129"
Test #13:
score: 0
Accepted
time: 0ms
memory: 3664kb
input:
789456 1
output:
1
result:
ok 1 number(s): "1"
Test #14:
score: 0
Accepted
time: 1ms
memory: 3652kb
input:
852516 2
output:
148946358
result:
ok 1 number(s): "148946358"
Test #15:
score: 0
Accepted
time: 123ms
memory: 3668kb
input:
1 953646
output:
40087733
result:
ok 1 number(s): "40087733"
Test #16:
score: 0
Accepted
time: 2ms
memory: 3540kb
input:
3 7686
output:
278212472
result:
ok 1 number(s): "278212472"
Extra Test:
score: 0
Extra Test Passed