提出 #14384827

---

ソースコード 拡げる

#include <bits/stdc++.h>
#define meow(args...) fprintf(stderr, args)
const int N = 50;
int a[N], cnt[1 << 18];
int main()
{
	int n, k, s, t;
	long long ans = 0, csum[N + 1] = {};
	scanf("%d%d%d%d", &n, &k, &s, &t);
	for (int i = 0; i < n; ++i) {
		scanf("%d", a + i);
		if ((a[i] & s) != s || (a[i] | t) != t) {
			--i;
			--n;
		}
	}
	if (n == 0)
		goto nosolution;
	for (int i = 1; i <= n; ++i) {
		long long com = 1;
		for (int j = 1; j <= i && j <= k; ++j)
			csum[i] += com = com * (i - j + 1) / j;
	}
	for (int i = n; i >= 1; --i)
		csum[i] -= csum[i - 1];
	for (int mask = 1 << 18; mask; ) {
		long long cur = 0;
		mask = (mask - 1) & (s ^ t);
		for (int i = 0; i < n; ++i)
			cur += csum[++cnt[a[i] & mask]];
		if (__builtin_popcount(mask) & 1)
			ans -= cur;
		else
			ans += cur;
		for (int i = 0; i < n; ++i)
			cnt[a[i] & mask] = 0;
	}
nosolution:
	printf("%lld\n", ans);
	return 0;
}

提出情報

コンパイルエラー

./Main.cpp: In function ‘int main()’:
./Main.cpp:9:7: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
    9 |  scanf("%d%d%d%d", &n, &k, &s, &t);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
./Main.cpp:11:8: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   11 |   scanf("%d", a + i);
      |   ~~~~~^~~~~~~~~~~~~

ジャッジ結果