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Submission #488555

# Submission time Handle Problem Language Result Execution time Memory
488555 2021-11-19T15:33:09 Z rainboy Set (COCI21_set) C
110 / 110
 126 ms 15224 KB 
#include <stdio.h>

#define K	12
#define N	531441

void fwt(long long (*aa)[2], int n) {
	if (n > 1) {
		int m = n / 3, i;

		fwt(aa, m), fwt(aa + m, m), fwt(aa + m * 2, m);
		for (i = 0; i < m; i++) {
			long long a0 = aa[i][0], a1 = aa[i][1];
			long long b0 = aa[i + m][0], b1 = aa[i + m][1];
			long long c0 = aa[i + m * 2][0], c1 = aa[i + m * 2][1];

			aa[i][0] = a0 + b0 + c0, aa[i][1] = a1 + b1 + c1;
			aa[i + m][0] = a0 - b1 + (c1 - c0), aa[i + m][1] = a1 + (b0 - b1) - c0;
			aa[i + m * 2][0] = a0 + (b1 - b0) - c1, aa[i + m * 2][1] = a1 - b0 + (c0 - c1);
		}
	}
}

void ifwt(long long (*aa)[2], int n) {
	if (n > 1) {
		int m = n / 3, i;

		for (i = 0; i < m; i++) {
			long long a0 = aa[i][0], a1 = aa[i][1];
			long long b0 = aa[i + m][0], b1 = aa[i + m][1];
			long long c0 = aa[i + m * 2][0], c1 = aa[i + m * 2][1];

			aa[i][0] = (a0 + b0 + c0) / 3, aa[i][1] = (a1 + b1 + c1) / 3;
			aa[i + m][0] = (a0 + (b1 - b0) - c1) / 3, aa[i + m][1] = (a1 - b0 + (c0 - c1)) / 3;
			aa[i + m * 2][0] = (a0 - b1 + (c1 - c0)) / 3, aa[i + m * 2][1] = (a1 + (b0 - b1) - c0) / 3;
		}
		ifwt(aa, m), ifwt(aa + m, m), ifwt(aa + m * 2, m);
	}
}

int main() {
	static long long aa[N][2];
	int n, k, i;
	long long ans;

	scanf("%d%d", &n, &k);
	while (n--) {
		static char cc[K + 1];
		int h;

		scanf("%s", cc);
		i = 0;
		for (h = 0; h < k; h++)
			i = i * 3 + (cc[h] - '1');
		aa[i][0]++;
	}
	ans = 0;
	for (i = 0; i < N; i++) {
		ans -= (long long) aa[i][0] * aa[i][0] * aa[i][0];
		ans += (long long) aa[i][0] * (aa[i][0] - 1) * (aa[i][0] - 2);
	}
	fwt(aa, N);
	for (i = 0; i < N; i++) {
		long long a0 = aa[i][0], a1 = aa[i][1];
		long long a = a1 * a1 * a1, b = a0 * a1 * a1 * 3, c = a0 * a0 * a1 * 3, d = a0 * a0 * a0;

		aa[i][0] = d - b + a, aa[i][1] = c - b;
	}
	ifwt(aa, N);
	ans += aa[0][0], ans /= 6;
	printf("%lld\n", ans);
	return 0;
}

Compilation message

Main.c: In function 'main':
Main.c:45:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |  scanf("%d%d", &n, &k);
      |  ^~~~~~~~~~~~~~~~~~~~~
Main.c:50:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |   scanf("%s", cc);
      |   ^~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 8524 KB Output is correct
2 Correct 31 ms 8540 KB Output is correct
3 Correct 31 ms 8524 KB Output is correct
4 Correct 31 ms 8592 KB Output is correct
5 Correct 31 ms 8508 KB Output is correct
6 Correct 33 ms 8572 KB Output is correct
7 Correct 35 ms 8572 KB Output is correct
8 Correct 35 ms 8552 KB Output is correct
9 Correct 41 ms 8484 KB Output is correct
10 Correct 34 ms 8524 KB Output is correct
11 Correct 31 ms 8524 KB Output is correct
12 Correct 31 ms 8596 KB Output is correct
13 Correct 31 ms 8564 KB Output is correct
14 Correct 35 ms 8524 KB Output is correct
15 Correct 31 ms 8524 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 8524 KB Output is correct
2 Correct 31 ms 8540 KB Output is correct
3 Correct 31 ms 8524 KB Output is correct
4 Correct 31 ms 8592 KB Output is correct
5 Correct 31 ms 8508 KB Output is correct
6 Correct 33 ms 8572 KB Output is correct
7 Correct 35 ms 8572 KB Output is correct
8 Correct 35 ms 8552 KB Output is correct
9 Correct 41 ms 8484 KB Output is correct
10 Correct 34 ms 8524 KB Output is correct
11 Correct 31 ms 8524 KB Output is correct
12 Correct 31 ms 8596 KB Output is correct
13 Correct 31 ms 8564 KB Output is correct
14 Correct 35 ms 8524 KB Output is correct
15 Correct 31 ms 8524 KB Output is correct
16 Correct 31 ms 8524 KB Output is correct
17 Correct 33 ms 8592 KB Output is correct
18 Correct 31 ms 8568 KB Output is correct
19 Correct 31 ms 8596 KB Output is correct
20 Correct 35 ms 8516 KB Output is correct
21 Correct 42 ms 8524 KB Output is correct
22 Correct 43 ms 8568 KB Output is correct
23 Correct 33 ms 8504 KB Output is correct
24 Correct 31 ms 8492 KB Output is correct
25 Correct 31 ms 8580 KB Output is correct
26 Correct 31 ms 8524 KB Output is correct
27 Correct 31 ms 8540 KB Output is correct
28 Correct 31 ms 8568 KB Output is correct
29 Correct 31 ms 8524 KB Output is correct
30 Correct 32 ms 8568 KB Output is correct

Subtask #3
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 8524 KB Output is correct
2 Correct 31 ms 8540 KB Output is correct
3 Correct 31 ms 8524 KB Output is correct
4 Correct 31 ms 8592 KB Output is correct
5 Correct 31 ms 8508 KB Output is correct
6 Correct 33 ms 8572 KB Output is correct
7 Correct 35 ms 8572 KB Output is correct
8 Correct 35 ms 8552 KB Output is correct
9 Correct 41 ms 8484 KB Output is correct
10 Correct 34 ms 8524 KB Output is correct
11 Correct 31 ms 8524 KB Output is correct
12 Correct 31 ms 8596 KB Output is correct
13 Correct 31 ms 8564 KB Output is correct
14 Correct 35 ms 8524 KB Output is correct
15 Correct 31 ms 8524 KB Output is correct
16 Correct 31 ms 8524 KB Output is correct
17 Correct 33 ms 8592 KB Output is correct
18 Correct 31 ms 8568 KB Output is correct
19 Correct 31 ms 8596 KB Output is correct
20 Correct 35 ms 8516 KB Output is correct
21 Correct 42 ms 8524 KB Output is correct
22 Correct 43 ms 8568 KB Output is correct
23 Correct 33 ms 8504 KB Output is correct
24 Correct 31 ms 8492 KB Output is correct
25 Correct 31 ms 8580 KB Output is correct
26 Correct 31 ms 8524 KB Output is correct
27 Correct 31 ms 8540 KB Output is correct
28 Correct 31 ms 8568 KB Output is correct
29 Correct 31 ms 8524 KB Output is correct
30 Correct 32 ms 8568 KB Output is correct
31 Correct 41 ms 8572 KB Output is correct
32 Correct 34 ms 8576 KB Output is correct
33 Correct 31 ms 8524 KB Output is correct
34 Correct 126 ms 15224 KB Output is correct
35 Correct 31 ms 8552 KB Output is correct
36 Correct 30 ms 8504 KB Output is correct
37 Correct 33 ms 8528 KB Output is correct
38 Correct 105 ms 14576 KB Output is correct
39 Correct 61 ms 10088 KB Output is correct
40 Correct 124 ms 14584 KB Output is correct
41 Correct 36 ms 9036 KB Output is correct
42 Correct 107 ms 14468 KB Output is correct
43 Correct 32 ms 8596 KB Output is correct
44 Correct 32 ms 8524 KB Output is correct
45 Correct 40 ms 8572 KB Output is correct