QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#462648#8339. Rooted TreecastcAC ✓1090ms164736kbC++20776b2024-07-03 23:06:172024-07-03 23:06:17

Judging History

你现在查看的是最新测评结果

  • [2024-07-03 23:06:17]
  • 评测
  • 测评结果:AC
  • 用时:1090ms
  • 内存:164736kb
  • [2024-07-03 23:06:17]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
#define int long long
const int N=5e7+10,M=1e9+9;
int ny[N],dp[N],zt[N],maxx,f[N];
int ksm(int a, int n, int p) {
    int ans = 1;
    while(n) {
        if(n & 1) {
            ans = ans * a % p;
        }
        a = a * a % p;
        n >>= 1;
    }
    return ans;
}
signed main(){
    int m,k;
    cin>>m>>k;
    f[0]=1; 
    for(int i=1;i<=k;i++){
        f[i]=f[i-1]-1+m;
    }
    dp[0]=0;
    ny[1]=1;
    for(int i=1;i<=k;i++){
        int zqx=ksm(f[i],M-2,M);
        dp[i] = (dp[i - 1] * (f[i - 1] - 1 + m) % M + m) * zqx;
        dp[i]%=M;
    }
    int ans1=dp[k]*f[k]%M;
    for(int i=1;i<k;i++){
        ans1+=dp[i];
        ans1%=M;
    }
    cout<<ans1<<endl;
    return 0;
} 

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 1ms
memory: 7768kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 0ms
memory: 7748kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 61ms
memory: 18348kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 716ms
memory: 113908kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 0ms
memory: 7744kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 785ms
memory: 121000kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 447ms
memory: 72812kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1073ms
memory: 164116kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 197ms
memory: 37668kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 592ms
memory: 92152kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 345ms
memory: 59164kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 323ms
memory: 54240kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 931ms
memory: 143600kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1090ms
memory: 164648kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1082ms
memory: 164736kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1085ms
memory: 162612kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed