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QOJ
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 |
---|---|---|---|---|---|---|---|---|---|
#735898 | #8339. Rooted Tree | qikala7777# | AC ✓ | 232ms | 318492kb | C++23 | 1.1kb | 2024-11-11 22:29:23 | 2024-11-11 22:29:24 |
Judging History
answer
#include<bits/stdc++.h>
#define IOS ios::sync_with_stdio(false);cin.tie(0);
#define endl '\n'
using namespace std;
typedef long long LL;
typedef unsigned long long ULL;
typedef tuple<int,LL,LL> TPL;
typedef pair<LL,LL> PII;
const int N=1e7+7,inf=0x3f3f3f3f;const LL Linf=0x3f3f3f3f3f3f3f3fLL;
LL qsm(LL a,LL b,LL p){LL res=1;while(b){if(b&1)res=res*a%p;a=a*a%p;b>>=1;}return res;}
LL lowbit(LL x){return x&-x;}
const LL mod=1e9+9;
LL M,K;
LL res,dep[N],cnt[N],a[N];
LL up[N],down[N];
void init(){
LL tt=1;
up[0]=down[0]=1;
for(int i=1;i<=K;i++){
tt+=M-1;
up[i]=up[i-1]*tt%mod;
}
down[K] = qsm(up[K],mod-2,mod);
for (int i = K-1; i; i--){
down[i] = down[i + 1] * tt % mod;
tt -= M - 1;
}
}
void solve(){
cin>>M>>K;
init();
dep[0]=0,res=0,cnt[0]=1;
for(int i=1;i<=K;i++){
res=(res+(dep[i-1]+1)*M%mod)%mod;
dep[i]=(dep[i-1]*(cnt[i-1]-1)%mod+(dep[i-1]+1)*M%mod)*up[i-1]%mod*down[i]%mod;
cnt[i]=(cnt[i-1]+M-1);
}
cout<<res<<endl;
}
int main(){
IOS
int T=1;
//cin>>T;
while(T--)solve();
return 0;
}
詳細信息
Test #1:
score: 100
Accepted
time: 1ms
memory: 9804kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 1ms
memory: 9876kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 18ms
memory: 29940kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 159ms
memory: 221840kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 9856kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 166ms
memory: 237884kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 91ms
memory: 138644kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 222ms
memory: 318020kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 27ms
memory: 67536kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 124ms
memory: 181360kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 69ms
memory: 110100kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 65ms
memory: 100676kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 189ms
memory: 278152kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 219ms
memory: 316388kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 220ms
memory: 318492kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 232ms
memory: 318424kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed