Submission #767595

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
767595	2023-06-26T22:23:21 Z	rainboy	Marriage questions (IZhO14_marriage)	C	66 / 100	583 ms	9388 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[NU], 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]++;
		}
		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;
		}
		ans += nu - r;
	}
	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	1 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	1 ms	212 KB	Output is correct
5	Correct	1 ms	212 KB	Output is correct
6	Correct	0 ms	300 KB	Output is correct
7	Incorrect	1 ms	340 KB	Output isn't correct
8	Correct	1 ms	212 KB	Output is correct
9	Correct	1 ms	340 KB	Output is correct
10	Correct	0 ms	300 KB	Output is correct
11	Correct	1 ms	340 KB	Output is correct
12	Correct	0 ms	300 KB	Output is correct
13	Correct	1 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	1 ms	296 KB	Output is correct
17	Correct	0 ms	340 KB	Output is correct
18	Correct	0 ms	296 KB	Output is correct
19	Incorrect	1 ms	468 KB	Output isn't correct
20	Incorrect	1 ms	468 KB	Output isn't correct
21	Correct	1 ms	468 KB	Output is correct
22	Correct	1 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	852 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	680 KB	Output is correct
29	Correct	2 ms	844 KB	Output is correct
30	Correct	2 ms	724 KB	Output is correct
31	Incorrect	9 ms	2736 KB	Output isn't correct
32	Incorrect	3 ms	2484 KB	Output isn't correct
33	Correct	3 ms	1704 KB	Output is correct
34	Correct	6 ms	2480 KB	Output is correct
35	Correct	38 ms	2876 KB	Output is correct
36	Correct	30 ms	2896 KB	Output is correct
37	Incorrect	14 ms	4796 KB	Output isn't correct
38	Correct	18 ms	4948 KB	Output is correct
39	Correct	230 ms	8988 KB	Output is correct
40	Correct	140 ms	8752 KB	Output is correct
41	Incorrect	151 ms	8936 KB	Output isn't correct
42	Correct	38 ms	4784 KB	Output is correct
43	Correct	40 ms	4908 KB	Output is correct
44	Correct	98 ms	9212 KB	Output is correct
45	Incorrect	453 ms	9032 KB	Output isn't correct
46	Incorrect	461 ms	9276 KB	Output isn't correct
47	Correct	190 ms	9388 KB	Output is correct
48	Correct	183 ms	9244 KB	Output is correct
49	Incorrect	457 ms	9288 KB	Output isn't correct
50	Correct	583 ms	9048 KB	Output is correct