Submission #767599

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
767599	2023-06-26T22:28:01 Z	rainboy	Marriage questions (IZhO14_marriage)	C	66 / 100	769 ms	9256 KB

marriage

/* https://oj.uz/submission/100855 (Benq) */
#include <stdio.h>
#include <string.h>

#define NU	30000
#define NV	4000

int nu, nv;
int eu[NV][NU], eo[NV], el[NV], er[NV];
int uu[NV], vv[NU]; char visited[NV];

int dfs(int v) {
	int o;

	if (visited[v])
		return 0;
	visited[v] = 1;
	for (o = el[v]; o < er[v]; o++) {
		int u = eu[v][o], w = vv[u];

		if (w == -1 || dfs(w)) {
			uu[v] = u, vv[u] = v;
			return 1;
		}
	}
	return 0;
}

int check() {
	int v;

	for (v = 0; v < nv; v++)
		if (uu[v] == -1) {
			memset(visited, 0, nv * sizeof *visited);
			if (!dfs(v))
				return 0;
		}
	return 1;
}

int main() {
	int m, h, l, r, u, v, ans;

	scanf("%d%d%d", &nu, &nv, &m);
	for (h = 0; h < m; h++) {
		scanf("%d%d", &u, &v), u--, v--;
		eu[v][eo[v]++] = u;
	}
	memset(uu, -1, nv * sizeof *uu), memset(vv, -1, nu * sizeof *vv);
	ans = 0;
	for (l = 0, r = -1; l < nu; l++) {
		while (r < nu && !check()) {
			r++;
			for (v = 0; v < nv; v++)
				if (er[v] < eo[v] && eu[v][er[v]] == r)
					er[v]++;
		}
		ans += nu - r;
		for (v = 0; v < nv; v++) {
			if (el[v] < eo[v] && eu[v][el[v]] == l)
				el[v]++;
			if (uu[v] == l)
				uu[v] = -1;
		}
	}
	printf("%d\n", ans);
	return 0;
}

Compilation message

marriage.c: In function 'main':
marriage.c:44:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |  scanf("%d%d%d", &nu, &nv, &m);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
marriage.c:46:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |   scanf("%d%d", &u, &v), u--, v--;
      |   ^~~~~~~~~~~~~~~~~~~~~

Subtask #1

66.0 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	0 ms	212 KB	Output isn't correct
2	Incorrect	1 ms	212 KB	Output isn't correct
3	Incorrect	0 ms	212 KB	Output isn't correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	0 ms	212 KB	Output is correct
6	Correct	1 ms	212 KB	Output is correct
7	Incorrect	1 ms	340 KB	Output isn't correct
8	Correct	0 ms	212 KB	Output is correct
9	Correct	1 ms	212 KB	Output is correct
10	Correct	0 ms	212 KB	Output is correct
11	Correct	1 ms	212 KB	Output is correct
12	Correct	1 ms	212 KB	Output is correct
13	Correct	1 ms	212 KB	Output is correct
14	Incorrect	1 ms	340 KB	Output isn't correct
15	Incorrect	0 ms	340 KB	Output isn't correct
16	Correct	1 ms	340 KB	Output is correct
17	Correct	1 ms	340 KB	Output is correct
18	Correct	1 ms	340 KB	Output is correct
19	Incorrect	1 ms	468 KB	Output isn't correct
20	Incorrect	0 ms	468 KB	Output isn't correct
21	Correct	0 ms	468 KB	Output is correct
22	Correct	0 ms	468 KB	Output is correct
23	Correct	1 ms	468 KB	Output is correct
24	Correct	0 ms	468 KB	Output is correct
25	Incorrect	3 ms	724 KB	Output isn't correct
26	Incorrect	2 ms	724 KB	Output isn't correct
27	Correct	1 ms	724 KB	Output is correct
28	Correct	1 ms	724 KB	Output is correct
29	Correct	2 ms	724 KB	Output is correct
30	Correct	2 ms	644 KB	Output is correct
31	Incorrect	8 ms	2520 KB	Output isn't correct
32	Incorrect	3 ms	2392 KB	Output isn't correct
33	Correct	2 ms	1624 KB	Output is correct
34	Correct	6 ms	2388 KB	Output is correct
35	Correct	49 ms	2788 KB	Output is correct
36	Correct	50 ms	2704 KB	Output is correct
37	Incorrect	14 ms	4720 KB	Output isn't correct
38	Correct	19 ms	4948 KB	Output is correct
39	Correct	255 ms	8956 KB	Output is correct
40	Correct	173 ms	8760 KB	Output is correct
41	Incorrect	160 ms	8812 KB	Output isn't correct
42	Correct	55 ms	4648 KB	Output is correct
43	Correct	40 ms	4784 KB	Output is correct
44	Correct	167 ms	9056 KB	Output is correct
45	Incorrect	466 ms	8920 KB	Output isn't correct
46	Incorrect	484 ms	9148 KB	Output isn't correct
47	Correct	213 ms	9256 KB	Output is correct
48	Correct	188 ms	9116 KB	Output is correct
49	Incorrect	573 ms	9220 KB	Output isn't correct
50	Correct	769 ms	9028 KB	Output is correct