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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
#347658#8339. Rooted Treeucup-team2681#AC ✓1397ms3932kbC++23659b2024-03-09 14:44:362024-03-09 14:44:36

Judging History

你现在查看的是最新测评结果

  • [2024-03-09 14:44:36]
  • 评测
  • 测评结果:AC
  • 用时:1397ms
  • 内存:3932kb
  • [2024-03-09 14:44:36]
  • 提交

answer

#include<bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
using namespace std;
const int p=1e9+9;
int qpow(int x,int y){
    int s=1;
    while(y){
        if(y&1)s=(ll)s*x%p;
        x=(ll)x*x%p;
        y>>=1;
    }
    return s;
}
void solve(){
    int sum=0,ans=0,n=1,m,k;
    scanf("%d%d",&m,&k);
    for(int i=1;i<=k;i++){
        int x,y,inv=qpow(n,p-2);
        ans=(ans+((ll)sum*inv+1)%p*m)%p;
        sum=(sum-(ll)sum*inv%p+((ll)sum*inv+1)%p*m+p)%p;
        n+=m-1;
        if(n>=p)n-=p;
    }
    printf("%d\n",ans);
}
int main(){
    int t=1;
    //scanf("%d",&t);
    while(t--)solve();
    return 0;
}

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 3708kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3932kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 86ms
memory: 3880kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 938ms
memory: 3900kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3788kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 1024ms
memory: 3848kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 569ms
memory: 3896kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1388ms
memory: 3820kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 252ms
memory: 3920kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 759ms
memory: 3892kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 450ms
memory: 3920kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 408ms
memory: 3788kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 1199ms
memory: 3796kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1397ms
memory: 3928kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1393ms
memory: 3888kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1397ms
memory: 3928kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed