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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
#348121#8339. Rooted Treeucup-team191#AC ✓1337ms1628kbC++23731b2024-03-09 17:02:122024-03-09 17:02:12

Judging History

你现在查看的是最新测评结果

  • [2024-03-09 17:02:12]
  • 评测
  • 测评结果:AC
  • 用时:1337ms
  • 内存:1628kb
  • [2024-03-09 17:02:12]
  • 提交

answer

#include <cstdio>

using namespace std;

typedef long long ll;

const int MOD = 1e9 + 9;

inline int add(int A, int B) {
	if(A + B >= MOD)
		return A + B - MOD;
	return A + B;
}

inline int sub(int A, int B) {
	if(A - B < 0)
		return A - B + MOD;
	return A - B;
}

inline int mul(int A, int B) {
	return (ll)A * B % MOD;
}

inline int pot(int A, int B) {
	int ret = 1;
	for(;B;B>>=1) {
		if(B & 1) ret = mul(ret, A);
		A = mul(A, A);
	}
	return ret;
}


int main(){
	int M, K; scanf("%d%d", &M, &K);
	int ans = 0;
	for(int i = 1;i <= K;i++) {
		int sad = (M - 1) * i + 1;
		int cv = (K - i) * M;
		ans = add(ans, mul(mul(M, cv), pot(sad, MOD - 2)));
	}
	printf("%d\n", add(ans, M * K));
}

詳細信息

Test #1:

score: 100
Accepted
time: 0ms
memory: 1608kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 0ms
memory: 1604kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 82ms
memory: 1512kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 897ms
memory: 1604kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 0ms
memory: 1512kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 976ms
memory: 1592kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 549ms
memory: 1512kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1321ms
memory: 1608kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 240ms
memory: 1512kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 725ms
memory: 1508kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 429ms
memory: 1564kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 390ms
memory: 1584kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 1155ms
memory: 1572kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1336ms
memory: 1604kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1337ms
memory: 1628kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1333ms
memory: 1508kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed