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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
#709594#8339. Rooted Treeyu7uanAC ✓1155ms159908kbC++17831b2024-11-04 15:41:112024-11-04 15:41:12

Judging History

你现在查看的是最新测评结果

  • [2024-11-04 15:41:12]
  • 评测
  • 测评结果:AC
  • 用时:1155ms
  • 内存:159908kb
  • [2024-11-04 15:41:11]
  • 提交

answer

#include<bits/stdc++.h>
#define rep(i, a, b) for(int i = (a); i <= (b); i ++)
#define int long long
using namespace std;

const int M = 1e7 + 5, MOD = 1e9 + 9;
int f[M], s[M];

int qmi(int a, int b){
	int res = 1;
	while(b){
		if(b & 1) res = res * a % MOD;
		a = a * a % MOD;
		b >>= 1; 
	}
	return res;
}
void sol(){
	int m, k;
	cin >> m >> k;
	if(k == 1){
		cout << m << "\n";
		return ;
	}
	int n = 1;
	f[1] = 1;
	rep(i, 2, k){
		n = (n + m - 1) % MOD;
		f[i] = (f[i - 1] + m * qmi((n + m - 1) % MOD, MOD - 2) % MOD) % MOD;
	}
	rep(i, 1, k){
		s[i] = (s[i - 1] + (f[i] + 1) * m % MOD) % MOD;
	}
	cout << (s[k - 1] + m) % MOD << "\n";
	return ;
}
signed main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	
	int T = 1;
//	cin >> T;
	while(T --){
		sol();
	}
	return 0;
} 

詳細信息

Test #1:

score: 100
Accepted
time: 1ms
memory: 5632kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 1ms
memory: 5708kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 72ms
memory: 15000kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 778ms
memory: 111520kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 1ms
memory: 5632kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 839ms
memory: 121996kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 472ms
memory: 68888kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1155ms
memory: 159856kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 211ms
memory: 34760kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 601ms
memory: 89424kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 348ms
memory: 56500kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 322ms
memory: 52736kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 991ms
memory: 142008kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1117ms
memory: 159832kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1125ms
memory: 159908kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1133ms
memory: 159832kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed