Submission #767596

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
767596	2023-06-26T22:24:40 Z	rainboy	Marriage questions (IZhO14_marriage)	C	66 / 100	585 ms	9244 KB

marriage

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

#define NU	30000
#define NV	2000

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	0 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	0 ms	212 KB	Output is correct
7	Incorrect	0 ms	340 KB	Output isn't correct
8	Correct	0 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	0 ms	212 KB	Output is correct
11	Correct	0 ms	212 KB	Output is correct
12	Correct	0 ms	212 KB	Output is correct
13	Correct	0 ms	212 KB	Output is correct
14	Incorrect	0 ms	340 KB	Output isn't correct
15	Incorrect	0 ms	340 KB	Output isn't correct
16	Correct	0 ms	340 KB	Output is correct
17	Correct	0 ms	340 KB	Output is correct
18	Correct	0 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	1 ms	468 KB	Output is correct
25	Incorrect	2 ms	724 KB	Output isn't correct
26	Incorrect	1 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	692 KB	Output is correct
30	Correct	1 ms	724 KB	Output is correct
31	Incorrect	10 ms	2604 KB	Output isn't correct
32	Incorrect	3 ms	2388 KB	Output isn't correct
33	Correct	2 ms	1620 KB	Output is correct
34	Correct	6 ms	2388 KB	Output is correct
35	Correct	38 ms	2840 KB	Output is correct
36	Correct	29 ms	2696 KB	Output is correct
37	Incorrect	14 ms	4708 KB	Output isn't correct
38	Correct	18 ms	4820 KB	Output is correct
39	Correct	231 ms	8928 KB	Output is correct
40	Correct	144 ms	8660 KB	Output is correct
41	Incorrect	167 ms	8788 KB	Output isn't correct
42	Correct	37 ms	4656 KB	Output is correct
43	Correct	40 ms	4692 KB	Output is correct
44	Correct	97 ms	9072 KB	Output is correct
45	Incorrect	466 ms	8916 KB	Output isn't correct
46	Incorrect	449 ms	9152 KB	Output isn't correct
47	Correct	187 ms	9244 KB	Output is correct
48	Correct	185 ms	9112 KB	Output is correct
49	Incorrect	451 ms	9172 KB	Output isn't correct
50	Correct	585 ms	9060 KB	Output is correct