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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#785028#8339. Rooted TreeCodeChild#AC ✓1141ms3696kbC++201.5kb2024-11-26 16:39:532024-11-26 16:39:54

Judging History

你现在查看的是最新测评结果

  • [2024-11-26 16:39:54]
  • 评测
  • 测评结果:AC
  • 用时:1141ms
  • 内存:3696kb
  • [2024-11-26 16:39:53]
  • 提交

answer

#include <iostream>
#include <cstring>
#include <queue>
#include <map>
#include <cstdio>
#include <unordered_map>
#include <deque>
#include <iomanip>
#include <cmath>
#include <vector>
#include <algorithm>
#include <stack>
#include <set>
#include <array>
#include <bitset>
#include <limits.h>
#include <numeric>
#define x first
#define y second

using namespace std;
typedef  long long LL;
typedef long long ll  ; 
typedef pair<int,int> PII;
typedef pair<int,LL> PIL;
typedef pair<int ,PII> PIII ;
typedef pair<int, pair<PII ,int > > PIIII;
typedef pair<LL , LL> PLL ; 
typedef pair<LL ,int > PLI ;
typedef pair<int,char > PIC ; 
typedef unsigned long long ULL ;
 
const int N = 5e5+10,M = 4e5+10  ;
const LL mod = 1e9+9 , INF = 1e18+10;
const int inf =  1e8 ; 
const double eps = 1e-7 ;
const ULL  P=  131 ;
LL n , m  , k   ;

LL qmi( LL a , LL b ) {
	LL  res = 1;
	while( b ) {
		if( b & 1 ) res = res * a % mod ;
		b >>= 1 ;
		a = a * a % mod ;
	}
	return res ;
}

LL inv(LL x ) {
	return qmi( x , mod - 2 ) ; 
} 

void solve( ) {
	cin >> m >> k ;
	LL ans = 0 , sum = 1 ;
	n = 1 ;
	for(int i = 1 ; i <= k ; ++ i ) {
		LL in = inv(n) ;
		ans += m * in % mod * sum % mod ;
		ans %= mod ;
		sum += ( m - 1 ) * in % mod * sum + m ;
		sum %= mod ; 
		n += m - 1 ;
	}
	cout << ans << '\n' ; 
	
	
	
} 	
 
 
 
int main(){ 	
	ios::sync_with_stdio(false);
	cin.tie( 0 ) ; cout.tie(0) ;
	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: 0ms
memory: 3636kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3568kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 70ms
memory: 3620kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 767ms
memory: 3568kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3636kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 834ms
memory: 3636kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 468ms
memory: 3616kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1132ms
memory: 3640kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 206ms
memory: 3636kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 618ms
memory: 3620kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 367ms
memory: 3620kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 334ms
memory: 3692kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 983ms
memory: 3636kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1141ms
memory: 3616kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1141ms
memory: 3696kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1141ms
memory: 3616kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed