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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
#276872#7875. Queue Sortingluyiming123WA 102ms4880kbC++141.2kb2023-12-06 12:07:082023-12-06 12:07:09

Judging History

你现在查看的是最新测评结果

  • [2023-12-06 12:07:09]
  • 评测
  • 测评结果:WA
  • 用时:102ms
  • 内存:4880kb
  • [2023-12-06 12:07:08]
  • 提交

answer

# include <bits/stdc++.h>
using namespace std;
using i64 = long long;
const int N = 505; 
const i64 mod = 998244353; 
int n, a[N]; 
i64 dp[N][N], fac[N], ifac[N]; 
void Add(i64 &x, i64 y) { x = (x + y) % mod; if(x < 0) x += mod; return; }
i64 qpow(i64 x, i64 p = mod - 2ll)
{
	i64 ans = 1ll;
	while(p)
	{
		if(p & 1) ans = ans * x % mod;
		x = x * x % mod, p >>= 1;
	}
	return ans;
}
i64 C(i64 n, i64 m)
{
	return fac[n] * ifac[m] % mod * ifac[n - m] % mod;
}
int main(void)
{
	fac[0] = 1ll; 
	for(int i = 1; i <= N - 5; i++) fac[i] = fac[i - 1] * i % mod; 
	ifac[N - 5] = qpow(fac[N - 5]);
	for(int i = N - 6; i >= 0; i--) ifac[i] = ifac[i + 1] * (i + 1) % mod;
	scanf("%d", &n); 
	for(int i = n; i >= 1; i--) scanf("%d", &a[i]); 
	dp[0][1] = 1;
	// dp[1][a[1]] = 1; 
	int suma = 0;  
	for(int i = 0; i < n; i++)
	{
		suma += a[i];
		for(int j = 1; j <= suma + 1; j++)
		{
			for(int k = 0; k < a[i + 1]; k++)
			{
				for(int l = 1; l < j; l++)
				{
					Add(dp[i + 1][k + l + 1], dp[i][j] * C(j - l - 1 + a[i + 1] - k - 1, a[i + 1] - k - 1) % mod);
				}
			}
			Add(dp[i + 1][j + a[i + 1]], dp[i][j]);
		}
	}
	i64 sum = 0; 
	for(int i = 0; i <= suma + 1; i++) Add(sum, dp[n][i]); 
	printf("%lld\n", sum + 1);
	return 0; 
}

詳細信息

Test #1:

score: 100
Accepted
time: 0ms
memory: 3880kb

input:

4
1 1 1 1

output:

14

result:

ok 1 number(s): "14"

Test #2:

score: -100
Wrong Answer
time: 102ms
memory: 4880kb

input:

300
0 5 2 2 1 0 3 2 2 5 2 1 1 2 1 3 2 3 2 0 0 0 0 1 2 2 3 0 2 2 3 2 0 2 3 0 6 0 0 2 0 1 3 2 1 1 1 3 4 0 1 0 4 1 1 1 1 1 1 2 3 2 1 2 3 2 3 0 5 3 3 2 0 1 1 0 2 1 1 2 0 0 2 1 1 3 2 2 1 2 1 3 0 3 0 1 2 2 0 5 0 2 2 0 0 0 1 2 1 4 2 1 1 0 3 0 2 0 3 1 1 2 0 2 1 1 0 2 0 1 2 2 3 3 1 1 1 1 0 1 3 3 1 0 2 2 4 2 ...

output:

507010275

result:

wrong answer 1st numbers differ - expected: '507010274', found: '507010275'