oj.uz

Submission #487026

# Submission time Handle Problem Language Result Execution time Memory
487026 2021-11-13T19:32:07 Z rainboy Ili (COI17_ili) C
100 / 100
 2644 ms 1888 KB 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define N	10000
#define M	10000

int *ej[N + M], eo[N + M], *fi[N + M], fo[N + M];

void append(int **ej, int *eo, int i, int j) {
	int o = eo[i]++;

	if (o >= 2 && (o & o - 1) == 0)
		ej[i] = (int *) realloc(ej[i], o * 2 * sizeof *ej[i]);
	ej[i][o] = j;
}

char state[N + M]; int n, m;

int check(char *cc) {
	int i, j, o;

	memset(state, -1, (n + m) * sizeof *state);
	for (j = n + m - 1; j >= 0; j--) {
		if (j >= n && cc[j - n] == '0')
			state[j] = 0;
		if (state[j] == 0)
			for (o = fo[j]; o--; ) {
				i = fi[j][o];
				state[i] = 0;
			}
	}
	for (i = 0; i < n + m; i++) {
		if (i < n && state[i] == -1)
			state[i] = 1;
		if (state[i] == 1)
			for (o = eo[i]; o--; ) {
				j = ej[i][o];
				state[j] = 1;
			}
	}
	for (j = 0; j < m; j++)
		if (cc[j] == '1' && state[n + j] != 1)
			return 0;
	return 1;
}

int main() {
	static char cc[M + 1];
	int i, j;

	scanf("%d%d%s", &n, &m, cc);
	for (i = 0; i < n + m; i++) {
		ej[i] = (int *) malloc(2 * sizeof *ej[i]);
		fi[i] = (int *) malloc(2 * sizeof *fi[i]);
	}
	for (j = 0; j < m; j++) {
		static char aa[8], bb[8];
		int u, v;

		scanf("%s%s", aa, bb);
		u = atoi(aa + 1) + (aa[0] == 'x' ? 0 : n) - 1, v = atoi(bb + 1) + (bb[0] == 'x' ? 0 : n) - 1;
		append(ej, eo, u, n + j), append(fi, fo, n + j, u);
		append(ej, eo, v, n + j), append(fi, fo, n + j, v);
	}
	for (j = 0; j < m; j++)
		if (cc[j] == '?') {
			cc[j] = '0';
			if (!check(cc))
				cc[j] = '1';
			else {
				cc[j] = '1';
				cc[j] = !check(cc) ? '0' : '?';
			}
		}
	printf("%s\n", cc);
	return 0;
}

Compilation message

ili.c: In function 'append':
ili.c:13:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   13 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~
ili.c: In function 'main':
ili.c:52:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |  scanf("%d%d%s", &n, &m, cc);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~
ili.c:61:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 |   scanf("%s%s", aa, bb);
      |   ^~~~~~~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct

Subtask #2
42.0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 3 ms 332 KB Output is correct
9 Correct 2 ms 332 KB Output is correct
10 Correct 2 ms 332 KB Output is correct
11 Correct 3 ms 332 KB Output is correct
12 Correct 2 ms 332 KB Output is correct
13 Correct 2 ms 332 KB Output is correct
14 Correct 3 ms 332 KB Output is correct

Subtask #3
51.0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 3 ms 332 KB Output is correct
9 Correct 2 ms 332 KB Output is correct
10 Correct 2 ms 332 KB Output is correct
11 Correct 3 ms 332 KB Output is correct
12 Correct 2 ms 332 KB Output is correct
13 Correct 2 ms 332 KB Output is correct
14 Correct 3 ms 332 KB Output is correct
15 Correct 392 ms 972 KB Output is correct
16 Correct 1086 ms 1136 KB Output is correct
17 Correct 1036 ms 1228 KB Output is correct
18 Correct 1975 ms 1452 KB Output is correct
19 Correct 1083 ms 1208 KB Output is correct
20 Correct 2359 ms 1696 KB Output is correct
21 Correct 2644 ms 1888 KB Output is correct
22 Correct 675 ms 1792 KB Output is correct
23 Correct 714 ms 1816 KB Output is correct
24 Correct 680 ms 1788 KB Output is correct
25 Correct 875 ms 1828 KB Output is correct
26 Correct 853 ms 1828 KB Output is correct
27 Correct 902 ms 1836 KB Output is correct
28 Correct 808 ms 1768 KB Output is correct
29 Correct 801 ms 1800 KB Output is correct
30 Correct 864 ms 1804 KB Output is correct
31 Correct 828 ms 1440 KB Output is correct
32 Correct 994 ms 1508 KB Output is correct