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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#817841#8339. Rooted TreeKowerKoint#AC ✓58ms3636kbC++20666b2024-12-17 13:24:412024-12-17 13:24:42

Judging History

你现在查看的是最新测评结果

  • [2024-12-17 13:24:42]
  • 评测
  • 测评结果:AC
  • 用时:58ms
  • 内存:3636kb
  • [2024-12-17 13:24:41]
  • 提交

answer

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

constexpr ll MOD = 1000000009;

ll pow_mod(ll x, ll n) {
  if(n==0) return 1;
  ll res = 1;
  while(n) {
    if(n&1) res = res*x%MOD;
    x=x*x%MOD;
    n>>=1;
  }
  return res;
}
ll pow_inv(ll x) {
  return pow_mod(x, MOD-2);
}


int main() {
  ll M, K; cin >> M >> K;
  ll ans = 0, e = 0, c = 1, cnt = 1;
  for(int k = 0; k < K; k++) {
    cnt *= c;
    cnt %= MOD;
    tie(c, e, ans) = make_tuple(c+M-1, e*c+e*(M-1)+M*cnt, ans*c+e*M+M*cnt);
    c %= MOD;
    e %= MOD;
    ans %= MOD;
  }
  ans *= pow_mod(cnt, MOD-2);
  ans %= MOD;
  cout << ans << '\n';
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3488kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3576kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 4ms
memory: 3576kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 39ms
memory: 3540kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3444kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 42ms
memory: 3492kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 24ms
memory: 3488kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 58ms
memory: 3508kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 11ms
memory: 3560kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 32ms
memory: 3588kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 19ms
memory: 3560kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 17ms
memory: 3504kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 50ms
memory: 3444kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 58ms
memory: 3636kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 58ms
memory: 3492kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 58ms
memory: 3592kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed