oj.uz

Submission #480131

# Submission time Handle Problem Language Result Execution time Memory
480131 2021-10-14T19:10:23 Z rainboy Checker (COCI19_checker) C
23 / 110
 112 ms 6056 KB 
#include <stdio.h>

#define N	200000

unsigned int X = 12345;

int rand_() {
	return (X *= 3) >> 1;
}

int ii[N], jj[N];

void sort(int *hh, int l, int r) {
	while (l < r) {
		int i = l, j = l, k = r, h = hh[l + rand_() % (r - l)], tmp;

		while (j < k) {
			int c = ii[hh[j]] != ii[h] ? ii[hh[j]] - ii[h] : jj[h] - jj[hh[j]];

			if (c == 0)
				j++;
			else if (c < 0) {
				tmp = hh[i], hh[i] = hh[j], hh[j] = tmp;
				i++, j++;
			} else {
				k--;
				tmp = hh[j], hh[j] = hh[k], hh[k] = tmp;
			}
		}
		sort(hh, l, i);
		l = k;
	}
}

int main() {
	static char cc[N + 1];
	static int hh[N];
	int n, h, i, cnt;

	scanf("%*d%d%s", &n, cc);
	for (i = 0; i < n; i++)
		cc[i] -= '0';
	for (i = 1; i < n; i++)
		cc[i] ^= cc[i - 1];
	if (cc[n - 1] != 0) {
		printf("neispravno bojenje\n");
		return 0;
	}
	for (h = 0; h < n - 3; h++) {
		int c, tmp;

		scanf("%d%d%d", &ii[h], &jj[h], &c), ii[h]--, jj[h]--;
		if (ii[h] > jj[h])
			tmp = ii[h], ii[h] = jj[h], jj[h] = tmp;
		if ((cc[jj[h] - 1] ^ (ii[h] == 0 ? 0 : cc[ii[h] - 1])) != c) {
			printf("neispravno bojenje\n");
			return 0;
		}
		hh[h] = h;
	}
	sort(hh, 0, n - 3);
	cnt = 0;
	for (h = 0; h < n - 3; h++) {
		int h_ = hh[h];

		while (cnt && jj[hh[cnt - 1]] <= ii[h_])
			cnt--;
		if (cnt && (jj[h_] > jj[hh[cnt - 1]] || ii[h_] == ii[hh[cnt - 1]] && jj[h_] == jj[hh[cnt - 1]])) {
			printf("neispravna triangulacija\n");
			return 0;
		}
		hh[cnt++] = h_;
	}
	printf("tocno\n");
	return 0;
}

Compilation message

checker.c: In function 'main':
checker.c:68:69: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   68 |   if (cnt && (jj[h_] > jj[hh[cnt - 1]] || ii[h_] == ii[hh[cnt - 1]] && jj[h_] == jj[hh[cnt - 1]])) {
      |                                           ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
checker.c:40:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |  scanf("%*d%d%s", &n, cc);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~
checker.c:52:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |   scanf("%d%d%d", &ii[h], &jj[h], &c), ii[h]--, jj[h]--;
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 12.0

# 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 Incorrect 0 ms 204 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 17.0

# 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 Incorrect 0 ms 204 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 105 ms 5844 KB Output is correct
2 Correct 105 ms 5860 KB Output is correct
3 Correct 101 ms 5872 KB Output is correct
4 Incorrect 4 ms 1048 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #4
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 112 ms 5904 KB Output is correct
2 Correct 103 ms 5828 KB Output is correct
3 Correct 2 ms 844 KB Output is correct
4 Correct 8 ms 1312 KB Output is correct
5 Correct 2 ms 844 KB Output is correct
6 Correct 109 ms 6056 KB Output is correct
7 Correct 107 ms 5920 KB Output is correct
8 Correct 2 ms 844 KB Output is correct
9 Correct 11 ms 1648 KB Output is correct

Subtask #5
0 / 35.0

# 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 Incorrect 0 ms 204 KB Output isn't correct
4 Halted 0 ms 0 KB -