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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#536768#8339. Rooted Treeucup-team2179#AC ✓1092ms3716kbC++20798b2024-08-29 16:33:392024-08-29 16:33:45

Judging History

你现在查看的是最新测评结果

  • [2024-08-29 16:33:45]
  • 评测
  • 测评结果:AC
  • 用时:1092ms
  • 内存:3716kb
  • [2024-08-29 16:33:39]
  • 提交

answer

#include <bits/stdc++.h>
#define int long long 
using namespace std;

const int M = 1e9 + 9;

int fp(int a,int b){
    int re=1;
    while(b){
        if(b&1)
            re = re * a % M;
        a = a * a % M;
        b = b >> 1;
    }
    return re;
}
int div(int n){
    return fp(n, M - 2);
}
void solve(){

    int m, k;
    cin >> m >> k;
    int pre = 1;
    int prev = 1;
    int e = 0;
    int ev = 0;
    for (int i = 1; i <= k;i++){ 
        ev += (e+1) * m%M;
        e = ((pre - 1) * e%M + m * (e + 1)%M) * (div(pre + m - 1))%M;

        ev %= M;
        pre += m - 1;
        prev += m;
        pre %= M;
        prev %= M;
    }
    cout << ev;
}

signed main(){
    int t=1;
//    cin>>t;
    while(t--)
        solve();
    return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3648kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3628kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 67ms
memory: 3632kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 732ms
memory: 3568kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 1ms
memory: 3512kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 798ms
memory: 3628kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 448ms
memory: 3688kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1081ms
memory: 3508kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 197ms
memory: 3508kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 591ms
memory: 3716kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 346ms
memory: 3624kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 319ms
memory: 3632kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 939ms
memory: 3552kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1092ms
memory: 3708kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1089ms
memory: 3556kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1085ms
memory: 3688kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed