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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
#549045#8339. Rooted TreeChuggAC ✓1205ms159372kbC++201.0kb2024-09-06 00:59:502024-09-06 00:59:50

Judging History

你现在查看的是最新测评结果

  • [2024-09-06 00:59:50]
  • 评测
  • 测评结果:AC
  • 用时:1205ms
  • 内存:159372kb
  • [2024-09-06 00:59:50]
  • 提交

answer

#include <bits/stdc++.h>

const int64_t MOD = 1E9 + 9;

int64_t power(int64_t a, int64_t b, int64_t p) 
{
    int64_t res = 1;
    while (b > 0) {
        if (b & 1) res = res * a % p;
        a = a * a % p;
        b >>= 1;
    }
    return res;
}

int64_t inv(int64_t a, int64_t p) 
{
    return power(a, p - 2, p);
}

void solve() 
{
    int m, k;
    std::cin >> m >> k;
    std::vector<int64_t> pinv(k), a(k + 1);
    for (int i = 1; i <= k; ++i) {
        int64_t num = (int64_t(m - 1) * (i - 1) % MOD + 1) % MOD;
        pinv[i - 1] = inv(num, MOD);
        a[i] = (((1 + (m - 1) * pinv[i - 1] % MOD) % MOD) * a[i - 1] % MOD + m) % MOD;
    }
    int64_t ans = 0;
    for (int i = 0; i < k; ++i) {
        ans = (ans + (a[i] * pinv[i] % MOD + 1) % MOD) % MOD;
    }
    ans = ans * m % MOD;
    std::cout << ans << '\n';
}   

int main() 
{
    std::cin.tie(nullptr)->std::ios::sync_with_stdio(false);
    
    int t = 1;
    while(t--) {
        solve();
    }
    
    return 0;
}

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 3584kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3820kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 73ms
memory: 12572kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 810ms
memory: 107920kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3820kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 874ms
memory: 117168kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 495ms
memory: 67132kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1200ms
memory: 157984kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 215ms
memory: 31324kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 649ms
memory: 87780kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 387ms
memory: 53348kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 353ms
memory: 48736kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 1037ms
memory: 137748kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1203ms
memory: 159288kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1204ms
memory: 159308kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1205ms
memory: 159372kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed