oj.uz

Submission #381149

# Submission time Handle Problem Language Result Execution time Memory
381149 2021-03-24T16:27:48 Z rainboy Duathlon (APIO18_duathlon) C
8 / 100
 46 ms 2788 KB 
#include <stdio.h>
#include <string.h>

#define N	100000
#define M	200000

int ds[N], mm[N], nn[N];

int find(int i) {
	return ds[i] < 0 ? i : (ds[i] = find(ds[i]));
}

void join(int i, int j) {
	i = find(i);
	j = find(j);
	if (i == j) {
		mm[i]++;
		return;
	}
	if (ds[i] > ds[j])
		ds[i] = j, mm[j] += mm[i] + 1, nn[j] += nn[i];
	else {
		if (ds[i] == ds[j])
			ds[i]--;
		ds[j] = i, mm[i] += mm[j] + 1, nn[i] += nn[j];
	}
}

int main() {
	int n, m, h, i, j;
	long long ans;

	scanf("%d%d", &n, &m);
	memset(ds, -1, n * sizeof *ds);
	for (i = 0; i < n; i++)
		nn[i] = 1;
	for (h = 0; h < m; h++) {
		scanf("%d%d", &i, &j), i--, j--;
		join(i, j);
	}
	ans = 0;
	for (i = 0; i < n; i++)
		if (ds[i] < 0)
			ans += nn[i] == mm[i] ?  (long long) nn[i] * (nn[i] - 1) * (nn[i] - 2) : (long long) nn[i] * (nn[i] - 1) * (nn[i] - 2) / 3;
	printf("%lld\n", ans);
	return 0;
}

Compilation message

count_triplets.c: In function 'main':
count_triplets.c:33:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   33 |  scanf("%d%d", &n, &m);
      |  ^~~~~~~~~~~~~~~~~~~~~
count_triplets.c:38:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   38 |   scanf("%d%d", &i, &j), i--, j--;
      |   ^~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 29 ms 2668 KB Output is correct
2 Correct 31 ms 2668 KB Output is correct
3 Correct 28 ms 2668 KB Output is correct
4 Correct 29 ms 2668 KB Output is correct
5 Correct 29 ms 2668 KB Output is correct
6 Correct 28 ms 2668 KB Output is correct
7 Correct 34 ms 2788 KB Output is correct
8 Correct 46 ms 2668 KB Output is correct
9 Correct 30 ms 2668 KB Output is correct
10 Correct 29 ms 2668 KB Output is correct
11 Correct 25 ms 2540 KB Output is correct
12 Correct 35 ms 2540 KB Output is correct
13 Correct 24 ms 2412 KB Output is correct
14 Correct 33 ms 2412 KB Output is correct
15 Correct 17 ms 2156 KB Output is correct
16 Correct 17 ms 2156 KB Output is correct
17 Correct 2 ms 1388 KB Output is correct
18 Correct 2 ms 1516 KB Output is correct
19 Correct 2 ms 1388 KB Output is correct
20 Correct 2 ms 1388 KB Output is correct
21 Correct 2 ms 1388 KB Output is correct
22 Correct 2 ms 1388 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 29 ms 2668 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 29 ms 2668 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -