提出 #30666667

---

ソースコード 拡げる

#include<cstdio>
using ll = long long;
constexpr const ll mod = 998244353;
inline constexpr ll Power(ll a, int b)
{
	ll ans = 1;
	for (; b; a = a * a % mod, b >>= 1)
	{
		if (b & 1)
		{
			ans = ans * a % mod;
		}
	}
	return ans;
}
int n, l;
char s[33];
int bit[22];
inline ll DFS(const int step, const int cnt, int mask)
{
	if (step > n)
	{
		if (cnt)
		{
			return cnt % 2 ? Power(__builtin_popcount(mask), l) : -Power(__builtin_popcount(mask), l);
		}
		return 0;
	}
	return DFS(step + 1, cnt, mask) + DFS(step + 1, cnt + 1, mask & bit[step]);
}
int main()
{
	scanf("%d%d", &n, &l);
	for (int i = 1; i <= n; ++i)
	{
		scanf("%s", s + 1);
		for (const char* p = s + 1; *p >= 'a'; bit[i] |= 1 << (*p - 'a'), ++p);
	}
	printf("%lld", (DFS(1, 0, 0xfffffff) % mod + mod) % mod);
	return 0;
}

提出情報

コンパイルエラー

./Main.cpp: In function ‘int main()’:
./Main.cpp:33:7: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   33 |  scanf("%d%d", &n, &l);
      |  ~~~~~^~~~~~~~~~~~~~~~
./Main.cpp:36:8: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   36 |   scanf("%s", s + 1);
      |   ~~~~~^~~~~~~~~~~~~

ジャッジ結果