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 |
|---|---|---|---|---|---|---|---|---|---|
| #559461 | #8833. Equalizer Ehrmantraut | gogo11# | AC ✓ | 118ms | 3728kb | C++20 | 718b | 2024-09-11 22:11:15 | 2024-09-11 22:11:16 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll mod = 998244353;
ll qp(ll a, ll b, ll mod)
{
ll ans = 1;
while(b)
{
if(b & 1) ans = ans * a % mod;
a = a * a % mod;
b >>= 1;
}
return ans;
}
void solve()
{
ll n, m;
cin >> n >> m;
if(m == 1) {
cout << 1 << "\n";
return;
}
ll ans = qp(m, n, mod), t = 0;
for(ll i = 2; i <= m; i ++)
{
ll x = i;
t += (i - 1) * ((qp(x, n, mod) - qp(x - 1, n, mod) + mod) % mod) % mod;
}
t *= 2;
t %= mod;
ans += t;
ans %= mod;
cout << ans << "\n";
}
int main()
{
ios::sync_with_stdio(false), cin.tie(0), cout.tie(0);
int T = 1;
// cin >> T;
while(T --)
{
solve();
}
}
这程序好像有点Bug，我给组数据试试？
詳細信息
Test #1:
score: 100
Accepted
time: 0ms
memory: 3612kb
input:
1 3
output:
9
result:
ok 1 number(s): "9"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3668kb
input:
2 2
output:
10
result:
ok 1 number(s): "10"
Test #3:
score: 0
Accepted
time: 0ms
memory: 3672kb
input:
69 42
output:
608932821
result:
ok 1 number(s): "608932821"
Test #4:
score: 0
Accepted
time: 0ms
memory: 3616kb
input:
102 156
output:
748401290
result:
ok 1 number(s): "748401290"
Test #5:
score: 0
Accepted
time: 6ms
memory: 3688kb
input:
4646 95641
output:
89806680
result:
ok 1 number(s): "89806680"
Test #6:
score: 0
Accepted
time: 19ms
memory: 3608kb
input:
42849 215151
output:
242217237
result:
ok 1 number(s): "242217237"
Test #7:
score: 0
Accepted
time: 100ms
memory: 3672kb
input:
786416 794116
output:
472898000
result:
ok 1 number(s): "472898000"
Test #8:
score: 0
Accepted
time: 96ms
memory: 3608kb
input:
963852 789456
output:
353211048
result:
ok 1 number(s): "353211048"
Test #9:
score: 0
Accepted
time: 49ms
memory: 3612kb
input:
696969 424242
output:
787990158
result:
ok 1 number(s): "787990158"
Test #10:
score: 0
Accepted
time: 15ms
memory: 3684kb
input:
1000000 123456
output:
533491028
result:
ok 1 number(s): "533491028"
Test #11:
score: 0
Accepted
time: 118ms
memory: 3664kb
input:
1000000 1000000
output:
572586375
result:
ok 1 number(s): "572586375"
Test #12:
score: 0
Accepted
time: 96ms
memory: 3692kb
input:
123456 1000000
output:
486967129
result:
ok 1 number(s): "486967129"
Test #13:
score: 0
Accepted
time: 0ms
memory: 3620kb
input:
789456 1
output:
1
result:
ok 1 number(s): "1"
Test #14:
score: 0
Accepted
time: 0ms
memory: 3728kb
input:
852516 2
output:
148946358
result:
ok 1 number(s): "148946358"
Test #15:
score: 0
Accepted
time: 6ms
memory: 3672kb
input:
1 953646
output:
40087733
result:
ok 1 number(s): "40087733"
Test #16:
score: 0
Accepted
time: 0ms
memory: 3636kb
input:
3 7686
output:
278212472
result:
ok 1 number(s): "278212472"
Extra Test:
score: 0
Extra Test Passed