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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#650386#8339. Rooted Treezxg2333#AC ✓1184ms42992kbC++17570b2024-10-18 14:55:312024-10-18 14:55:38

Judging History

你现在查看的是最新测评结果

  • [2024-10-18 14:55:38]
  • 评测
  • 测评结果:AC
  • 用时:1184ms
  • 内存:42992kb
  • [2024-10-18 14:55:31]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
const int P=1e9+9,M=1e7+1;
int ksm(int a,int b){
    int res=1;
    while(b){
        if(b&1)res=res*1ll*a%P;
        b>>=1;
        a=a*1ll*a%P;
    }
    return res;
}
int ni(int a){
    return ksm(a,P-2);
}
int m,k,cnt[M],ans;
int main(){
    scanf("%d%d",&m,&k);
    cnt[0]=1;
    for(int i=1;i<=k;i++)cnt[i]=cnt[i-1]+m-1;
    int sd=0;
    for(int i=1;i<=k;i++){
        ans=(ans+(sd+1)*1ll*m)%P;
        sd=(sd*1ll*(cnt[i-1]-1)+(sd+1)*1ll*m)%P*1ll*ni(cnt[i])%P;
    }
    printf("%d\n",ans);
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3928kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3808kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 74ms
memory: 6840kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 792ms
memory: 30476kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3752kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 867ms
memory: 33896kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 486ms
memory: 20832kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1175ms
memory: 42688kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 216ms
memory: 12800kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 638ms
memory: 26896kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 379ms
memory: 17160kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 344ms
memory: 16372kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 1022ms
memory: 39260kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1183ms
memory: 42992kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1184ms
memory: 42932kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1184ms
memory: 42880kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed