QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#639509#8339. Rooted TreeBlamek#AC ✓1166ms3720kbC++17810b2024-10-13 20:05:252024-10-13 20:05:25

Judging History

你现在查看的是最新测评结果

  • [2024-10-13 20:05:25]
  • 评测
  • 测评结果:AC
  • 用时:1166ms
  • 内存:3720kb
  • [2024-10-13 20:05:25]
  • 提交

answer

#include<bits/stdc++.h>

using namespace std;

#define int long long

const int mod = 1e9 + 9;

int qmi(int a, int b = mod - 2) {
    int ans=1;
    for(;b!=0;b/=2){
        if(b&1) ans=ans*a%mod;
        a=a*a%mod;
    }
    return ans;
}

void solve() {
    int m, k;
    cin >> m >> k;
    int ans = 0, res = 0, sum = 1;
    for (int i = 1; i <= k; i++) {
        int z = (res * qmi(sum) % mod + 1) % mod;
        ans = (ans + z * m % mod) % mod;
        sum = sum + m - 1;
        res -= z - 1;
        res += z * m;
        res = (res % mod + mod) % mod;
//        cout<<ans<<" "<<res<<" "<<sum<<"\n";
    }
    cout << ans << "\n";
}

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int t = 1;
//    cin >> t;
    while (t--) solve();
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3652kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

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

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 72ms
memory: 3592kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 783ms
memory: 3648kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

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

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 852ms
memory: 3584kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 479ms
memory: 3596kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1153ms
memory: 3648kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 210ms
memory: 3640kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 632ms
memory: 3648kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 371ms
memory: 3720kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 341ms
memory: 3668kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 1004ms
memory: 3652kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1162ms
memory: 3652kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1166ms
memory: 3584kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1166ms
memory: 3612kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed