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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
#685413#8339. Rooted Treeucup-team1412AC ✓1177ms159944kbC++23864b2024-10-28 19:19:382024-10-28 19:19:38

Judging History

你现在查看的是最新测评结果

  • [2024-10-28 19:19:38]
  • 评测
  • 测评结果:AC
  • 用时:1177ms
  • 内存:159944kb
  • [2024-10-28 19:19:38]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define endl '\n'
const ll maxn = 1e7 + 10;
const ll maxm = 1e7 + 10;
const ll inf = 0x3f3f3f3f;
const ll P = 1e9 + 9;
ll quickpow(ll x, ll y) {
    ll ans = 1;
    while (y) {
        if (y & 1) ans *= x;
        ans %= P;
        y >>= 1;
        x *= x;
        x %= P;
    }
    return ans % P;
}

ll A[maxn], B[maxn];

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    ll m, k;
    cin >> m >> k;
    A[0] = 0;
    B[0] = 0;
    // cout << quickpow(3, 5);
    for (ll i = 1; i <= k; i++) {
        ll ni = quickpow((m - 1) * (i - 1) + 1, P - 2);
        A[i] = (A[i - 1] * ((m - 1) * ni % P + 1) % P + m % P) % P;
        B[i] = (B[i - 1] + A[i - 1] * ni % P) % P;
    }
    cout << (A[k] + B[k]) % P;
    return 0;
}

详细

Test #1:

score: 100
Accepted
time: 1ms
memory: 5616kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 1ms
memory: 5624kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 71ms
memory: 15140kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 789ms
memory: 110176kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 1ms
memory: 5660kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 865ms
memory: 120204kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 487ms
memory: 68876kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1173ms
memory: 159252kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 210ms
memory: 32544kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 622ms
memory: 89604kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 376ms
memory: 57448kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 337ms
memory: 51596kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 1011ms
memory: 141612kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1170ms
memory: 159888kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1175ms
memory: 159860kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1177ms
memory: 159944kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed