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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
#358641#8339. Rooted TreeKirill22#AC ✓1197ms3644kbC++23891b2024-03-19 21:44:442024-03-19 21:44:44

Judging History

你现在查看的是最新测评结果

  • [2024-03-19 21:44:44]
  • 评测
  • 测评结果:AC
  • 用时:1197ms
  • 内存:3644kb
  • [2024-03-19 21:44:44]
  • 提交

answer

#include "bits/stdc++.h"

using namespace std;

const int mod = (int) 1e9 + 9;

int add(int x, int y) {
    return x + y >= mod ? x + y - mod : x + y;
}

int sub(int x, int y) {
    return x - y < 0 ? x - y + mod : x - y;
}

int mul(int x, int y) {
    return x * 1ll * y % mod;
}

int binpow(int x, int n) {
    int res = 1;
    while (n) {
        if (n & 1) {
            res = mul(res, x);
        }
        x = mul(x, x);
        n >>= 1;
    }
    return res;
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int m, k;
    cin >> m >> k;
    int cnt = 1, ans = 0, e = 0;
    for (int i = 0; i < k; i++) {
        int res = mul(e + 1, m);
        ans = add(ans, res);
        e = add(mul(e, cnt - 1), res);
        cnt += m - 1;
        e = mul(e, binpow(cnt, mod - 2));
    }
    cout << ans << '\n';
}

详细

Test #1:

score: 100
Accepted
time: 1ms
memory: 3604kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3600kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 74ms
memory: 3604kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 804ms
memory: 3644kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 1ms
memory: 3560kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 874ms
memory: 3552kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 491ms
memory: 3548kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1187ms
memory: 3624kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 217ms
memory: 3604kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 649ms
memory: 3552kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 385ms
memory: 3604kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 350ms
memory: 3584kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 1031ms
memory: 3644kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1196ms
memory: 3644kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1197ms
memory: 3604kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1196ms
memory: 3608kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed