oj.uz

Submission #703234

# Submission time Handle Problem Language Result Execution time Memory
703234 2023-02-26T16:42:47 Z rainboy Global Warming (NOI13_gw) C
40 / 40
 308 ms 17676 KB 
#include <stdio.h>

#define N	1000000

int max(int a, int b) { return a > b ? a : b; }

unsigned int X = 12345;

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

int aa[N];

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

		while (j < k)
			if (aa[ii[j]] == aa[i_])
				j++;
			else if (aa[ii[j]] < aa[i_]) {
				tmp = ii[i], ii[i] = ii[j], ii[j] = tmp;
				i++, j++;
			} else {
				k--;
				tmp = ii[j], ii[j] = ii[k], ii[k] = tmp;
			}
		sort(ii, l, i);
		l = k;
	}
}

int main() {
	static int ii[N];
	static char active[N];
	int n, i, i_, j, k, k_, a;

	scanf("%d", &n);
	for (i = 0; i < n; i++)
		scanf("%d", &aa[i]);
	for (i = 0; i < n; i++)
		ii[i] = i;
	sort(ii, 0, n);
	k = 0, k_ = 0;
	for (j = n - 1; j >= 0; j = i) {
		i = j, a = aa[ii[j]];
		while (i >= 0 && aa[ii[i]] == a) {
			i_ = ii[i--];
			k++;
			active[i_] = 1;
			if (i_ > 0 && active[i_ - 1])
				k--;
			if (i_ + 1 < n && active[i_ + 1])
				k--;
		}
		k_ = max(k_, k);
	}
	printf("%d\n", k_);
	return 0;
}

Compilation message

gw.c: In function 'main':
gw.c:39:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |  scanf("%d", &n);
      |  ^~~~~~~~~~~~~~~
gw.c:41:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |   scanf("%d", &aa[i]);
      |   ^~~~~~~~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 1168 KB Output is correct
2 Correct 12 ms 1444 KB Output is correct
3 Correct 12 ms 1352 KB Output is correct
4 Correct 12 ms 1328 KB Output is correct
5 Correct 14 ms 1364 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 1100 KB Output is correct
2 Correct 19 ms 1152 KB Output is correct
3 Correct 27 ms 1072 KB Output is correct
4 Correct 26 ms 1152 KB Output is correct
5 Correct 25 ms 1104 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 297 ms 9052 KB Output is correct
2 Correct 307 ms 8984 KB Output is correct
3 Correct 308 ms 9064 KB Output is correct
4 Correct 297 ms 8976 KB Output is correct
5 Correct 288 ms 9100 KB Output is correct

Subtask #5
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 288 ms 8992 KB Output is correct
2 Correct 295 ms 9040 KB Output is correct
3 Correct 292 ms 17676 KB Output is correct
4 Correct 128 ms 11832 KB Output is correct
5 Correct 142 ms 11832 KB Output is correct