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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
#713508#8339. Rooted TreefoyonaczyAC ✓1156ms3716kbC++20770b2024-11-05 19:39:462024-11-05 19:39:47

Judging History

你现在查看的是最新测评结果

  • [2024-11-05 19:39:47]
  • 评测
  • 测评结果:AC
  • 用时:1156ms
  • 内存:3716kb
  • [2024-11-05 19:39:46]
  • 提交

answer

#include<bits/stdc++.h>

#define endl '\n'
using i64 = long long;
constexpr i64 MOD = 1e9 + 9;

i64 binpow(i64 a, i64 b) {
    i64 res = 1;
    while (b) {
        if (b & 1) res = (res * a) % MOD;
        a = (a * a) % MOD;
        b >>= 1;
    }
    return res;
}

void solve() {
    i64 m, k;
    std::cin >> m >> k;
    i64 d = 0, ans = 0;
    for (int i = 1; i <= k; i++) {
        ans = (ans + (d + 1) % MOD * m % MOD) % MOD;
        i64 sum = (i - 1) * (m - 1) % MOD;
        d = (sum * d % MOD + m * (d + 1) % MOD) * binpow(sum + m, MOD - 2) % MOD;
    }
    std::cout << ans << '\n';
}

int main() {
    std::ios::sync_with_stdio(false), std::cin.tie(nullptr);
    int CZY = 1;
//    std::cin >> CZY;
    while (CZY--)solve();
}

詳細信息

Test #1:

score: 100
Accepted
time: 0ms
memory: 3716kb

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: 71ms
memory: 3644kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 773ms
memory: 3640kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3584kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 841ms
memory: 3708kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 471ms
memory: 3592kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1147ms
memory: 3664kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 209ms
memory: 3660kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 627ms
memory: 3660kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 372ms
memory: 3604kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 338ms
memory: 3652kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 996ms
memory: 3584kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1156ms
memory: 3708kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1156ms
memory: 3580kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1156ms
memory: 3588kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed