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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
#483544#8150. XOR SumYuicsAC ✓21ms5720kbC++201.6kb2024-07-18 19:05:302024-07-18 19:05:30

Judging History

你现在查看的是最新测评结果

  • [2024-07-18 19:05:30]
  • 评测
  • 测评结果:AC
  • 用时:21ms
  • 内存:5720kb
  • [2024-07-18 19:05:30]
  • 提交

answer

#include <bits/stdc++.h>

using i64 = long long;

constexpr int N = 207;
constexpr int M = 50;
constexpr int P = 1e9 + 7;

int k, C[M][M], f[M][M][N];
i64 m, n;

int dfs(int digit, int lim, int res) {  //现在在 2^digit 位,有 lim 个数达到m的上限,高于等于这个位的还需要的 value 为 res
	if (digit < 0) return res == 0;
	if (res < 0) return 0;
	if ((k / 2) * ((k + 1) / 2) * 2 - 1 < res) return 0;
	if (f[digit][lim][res] != -1) return f[digit][lim][res];
	int ret = 0;
	int add_res = digit == 0 ? 0 : n >> (digit - 1) & 1;
	if (m >> digit & 1) {
		for (int i = 0; i <= lim; ++i)
			for (int j = 0; j <= k - lim; ++j) {
				int val = (i + j) * (k - i - j);
				if (val > res) continue;
				ret += 1ll * C[lim][i] * C[k - lim][j] % P * dfs(digit - 1, i, (res - val) << 1 | add_res) % P;
				ret %= P;
			}
	} else {
		for (int j = 0; j <= k - lim; ++j) {
			int val = j * (k - j);
			if (val > res) continue;
			ret += 1ll * C[k - lim][j] * dfs(digit - 1, lim, (res - val) << 1 | add_res) % P;
			ret %= P;
		}
	}
	return f[digit][lim][res] = ret;
}

void init() {
	for (int i = 0; i <= 18; ++i) {
		C[i][0] = 1;
		for (int j = 1; j <= i; ++j) 
			C[i][j] = (C[i - 1][j] + C[i - 1][j - 1]) % P;
	}
	memset(f, -1, sizeof(f));
}

int main() {
	std::ios::sync_with_stdio(false);
	std::cin.tie(nullptr);

	init();

	std::cin >> n >> m >> k;
	int digit = 0;
	i64 tm = m;
	while (tm / 2) { ++digit; tm /= 2; }

	if (k == 1)
		std::cout << (n == 0 ? m + 1 : 0) << "\n";
	else
		std::cout << dfs(digit, k, n >> digit) << "\n";
	return 0;
}

这程序好像有点Bug,我给组数据试试?

詳細信息

Test #1:

score: 100
Accepted
time: 1ms
memory: 5560kb

input:

6 2 3

output:

12

result:

ok 1 number(s): "12"

Test #2:

score: 0
Accepted
time: 0ms
memory: 5652kb

input:

30 6 5

output:

1520

result:

ok 1 number(s): "1520"

Test #3:

score: 0
Accepted
time: 0ms
memory: 5520kb

input:

0 0 1

output:

1

result:

ok 1 number(s): "1"

Test #4:

score: 0
Accepted
time: 0ms
memory: 5572kb

input:

0 0 2

output:

1

result:

ok 1 number(s): "1"

Test #5:

score: 0
Accepted
time: 1ms
memory: 5508kb

input:

0 1145141919 2

output:

145141913

result:

ok 1 number(s): "145141913"

Test #6:

score: 0
Accepted
time: 1ms
memory: 5504kb

input:

0 0 18

output:

1

result:

ok 1 number(s): "1"

Test #7:

score: 0
Accepted
time: 1ms
memory: 5720kb

input:

0 12412414 18

output:

12412415

result:

ok 1 number(s): "12412415"

Test #8:

score: 0
Accepted
time: 3ms
memory: 5580kb

input:

32071009996106 682053093123 12

output:

443207413

result:

ok 1 number(s): "443207413"

Test #9:

score: 0
Accepted
time: 1ms
memory: 5580kb

input:

35533005762427 688386210611 9

output:

0

result:

ok 1 number(s): "0"

Test #10:

score: 0
Accepted
time: 8ms
memory: 5668kb

input:

35533005762427 688386210611 18

output:

132815685

result:

ok 1 number(s): "132815685"

Test #11:

score: 0
Accepted
time: 21ms
memory: 5512kb

input:

12412412412412 549755813887 18

output:

769139144

result:

ok 1 number(s): "769139144"

Test #12:

score: 0
Accepted
time: 6ms
memory: 5572kb

input:

12412412412412 549755813887 17

output:

256540093

result:

ok 1 number(s): "256540093"

Test #13:

score: 0
Accepted
time: 6ms
memory: 5564kb

input:

12412412412412 549755813887 15

output:

661919152

result:

ok 1 number(s): "661919152"

Test #14:

score: 0
Accepted
time: 2ms
memory: 5716kb

input:

8213830533897 180838478436 12

output:

960275439

result:

ok 1 number(s): "960275439"

Test #15:

score: 0
Accepted
time: 10ms
memory: 5560kb

input:

8213830533897 180838478436 18

output:

794870059

result:

ok 1 number(s): "794870059"

Test #16:

score: 0
Accepted
time: 0ms
memory: 5584kb

input:

56737445336495 759179417237 12

output:

0

result:

ok 1 number(s): "0"

Test #17:

score: 0
Accepted
time: 7ms
memory: 5584kb

input:

56737445336495 759179417237 18

output:

302105482

result:

ok 1 number(s): "302105482"

Test #18:

score: 0
Accepted
time: 3ms
memory: 5580kb

input:

56737445336495 759179417237 15

output:

0

result:

ok 1 number(s): "0"

Test #19:

score: 0
Accepted
time: 0ms
memory: 5628kb

input:

12412412412412 274877906944 18

output:

430003400

result:

ok 1 number(s): "430003400"

Test #20:

score: 0
Accepted
time: 3ms
memory: 5524kb

input:

32412412412412 274877906944 18

output:

657686236

result:

ok 1 number(s): "657686236"

Test #21:

score: 0
Accepted
time: 0ms
memory: 5516kb

input:

562949953421311 549755813887 18

output:

0

result:

ok 1 number(s): "0"

Test #22:

score: 0
Accepted
time: 1ms
memory: 5716kb

input:

985162418487295 549755813887 18

output:

0

result:

ok 1 number(s): "0"

Test #23:

score: 0
Accepted
time: 1ms
memory: 5520kb

input:

985162418487295 962072674303 18

output:

0

result:

ok 1 number(s): "0"

Test #24:

score: 0
Accepted
time: 20ms
memory: 5584kb

input:

35184372088831 962072674303 18

output:

665848241

result:

ok 1 number(s): "665848241"

Extra Test:

score: 0
Extra Test Passed