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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#516569#8339. Rooted Treelsflsf2023AC ✓1151ms159864kbC++141.0kb2024-08-12 18:56:202024-08-12 18:56:23

Judging History

你现在查看的是最新测评结果

  • [2024-08-12 18:56:23]
  • 评测
  • 测评结果:AC
  • 用时:1151ms
  • 内存:159864kb
  • [2024-08-12 18:56:20]
  • 提交

answer

#include <bits/stdc++.h>

using namespace std;
using LL = long long;
using PII = pair<LL , int> ;
using ULL = unsigned long long;

const int N = 1e7 + 10,Mod = 1e9 + 9;

LL a[N] , b[N];

LL qmi(LL a , LL b){
    LL res = 1;
    while(b){
        if(b & 1) res = res * a % Mod;
        a = a * a % Mod;
        b >>= 1;
    }
    return res;
}

void solved() {
    LL m , k;
    cin >> m >> k;

    LL ans = 0;
    for(int i = 1 ; i <= k ; i ++ ){

        LL inv = qmi((m - 1) * (i - 1) + 1 , Mod - 2);

        LL res = ((m - 1) * i + 1) % Mod * inv % Mod;
        a[i] = (res * a[i - 1]) % Mod;
        a[i] = (a[i] + m) % Mod;

        res = a[i - 1] * inv % Mod;
        b[i] = (b[i - 1] + res) % Mod;

        ans = (ans + b[i]) % Mod;
    }
    cout << (b[k] + a[k]) % Mod << "\n";
}

int main(){

//      freopen("D:\\dev\\code\\sunwking\\1.in" , "r" , stdin);

    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int t = 1;
//    cin >> t;

    while(t -- )
        solved();


    return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3632kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

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

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 73ms
memory: 13804kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 764ms
memory: 112120kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3636kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 833ms
memory: 120768kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 464ms
memory: 70116kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1134ms
memory: 158636kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 207ms
memory: 33864kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 617ms
memory: 90272kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 371ms
memory: 55668kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 330ms
memory: 51300kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 978ms
memory: 141628kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1151ms
memory: 159804kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1139ms
memory: 159804kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1151ms
memory: 159864kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed