QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#706475#8339. Rooted TreeAnneliese#AC ✓1130ms161712kbC++141.0kb2024-11-03 11:37:252024-11-03 11:37:27

Judging History

你现在查看的是最新测评结果

  • [2024-11-03 11:37:27]
  • 评测
  • 测评结果:AC
  • 用时:1130ms
  • 内存:161712kb
  • [2024-11-03 11:37:25]
  • 提交

answer

#include<bits/stdc++.h>

using namespace std;
using LL = long long;
using ll = long long;
const int N = 10000005;
#define rep(i,a ,b )  for(int i = a ;i<=b;i++)
#define pre(i,a ,b )  for(int i = a ;i>=b;i--)
#define pb push_back
#define sc(x) scanf("%d",&x)
ll dp[N];
ll f[N];
ll dp2[N];
const int mod=1e9+9;
ll ksm(ll a,ll b){ll res=1;
while(b){
	if(b%2==1)res=res*a%mod;a=a*a%mod;b/=2;
}
return res;
}
ll ny[N];
void solve() {
	int m,k;
	sc(m);sc(k);
	f[0]=1;
	rep(i,1,k)f[i]=(f[i-1]+m-1)%mod;
	/*rep(i,2,k){
		ny[i]=(mod-mod/i)*ny[mod%i]%mod;
	}*/
	ll res=0;
	rep(i,1,k){
		ll tmp=ksm(f[i-1],mod-2);
		dp[i]=dp[i-1]+(dp[i-1]*(m-1)%mod+f[i-1]*m%mod)*tmp%mod;//dp[i]为叶子节点深度之和 
		dp[i]%=mod;
		res=(res+(dp[i-1]*m%mod+f[i-1]*m%mod)*tmp)%mod;
	//	cout<<dp[i-1]*m%mod+f[i-1]*m%mod*ksm(f[i-1],mod-2)%mod<<" "<<endl;
	}
	cout<<res<<endl; 
}


int main() {

    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    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: 1ms
memory: 5868kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 1ms
memory: 5812kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 64ms
memory: 15412kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 804ms
memory: 112028kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 1ms
memory: 5888kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 832ms
memory: 121660kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 464ms
memory: 72380kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1130ms
memory: 161400kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 206ms
memory: 34408kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 605ms
memory: 92448kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 365ms
memory: 56620kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 331ms
memory: 52452kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 987ms
memory: 141168kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1122ms
memory: 160392kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1129ms
memory: 161712kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1127ms
memory: 160776kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed