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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
#569744#8339. Rooted TreePoole_teaAC ✓1179ms159932kbC++14714b2024-09-17 10:00:172024-09-17 10:00:19

Judging History

你现在查看的是最新测评结果

  • [2024-09-17 10:00:19]
  • 评测
  • 测评结果:AC
  • 用时:1179ms
  • 内存:159932kb
  • [2024-09-17 10:00:17]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std ;
#define int long long
const int MAXN = 1e7 + 10 ;
const int mod = 1e9 + 9 ;
int dp[MAXN], inv[MAXN], ans ;
inline int quick_pow (int a, int b) {
	int res = 1 ;
	while (b) {
		if (b & 1) {
			res *= a ;
			res %= mod ;
		}
		a *= a ;
		a %= mod ;
		b >>= 1 ;
	}
	return res ;
}
signed main () {
	int m, k ;
	cin >> m >> k ;
	for (int i = 1 ; i <= k ; i++) {
		inv[i] = quick_pow (((m - 1) * (i - 1) % mod + 1) % mod , mod - 2) ;
		dp[i] = (dp[i - 1] % mod) + (m - 1) * (dp[i - 1] * inv[i] % mod) + m ;
		dp[i] %= mod ; 
	}
	for (int i = 1 ; i <= k ; i++) {
		ans += m * (dp[i - 1] * inv[i] % mod) + m ;
		ans %= mod ;
	}
	cout << ans ;
}

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 3696kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

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

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 74ms
memory: 14496kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 767ms
memory: 108832kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

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

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 855ms
memory: 121404kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 476ms
memory: 69948kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1143ms
memory: 158648kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 211ms
memory: 34800kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 633ms
memory: 90492kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 375ms
memory: 56812kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 347ms
memory: 49832kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 1002ms
memory: 140056kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1143ms
memory: 159932kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1160ms
memory: 159876kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1179ms
memory: 159752kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed