Submission #706748

#	Time	Username	Problem	Language	Result	Execution time	Memory
706748		rainboy	Measures (CEOI22_measures)	C11	100 / 100	157 ms	21840 KiB

Main

#include <stdio.h>

#define N	200000
#define M	200000
#define N_	(1 << 19)	/* N_ = pow2(ceil(log2(N + M))) */
#define INF	0x3f3f3f3f3f3f3f3fLL

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

unsigned int X = 12345;

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

int xx[N + M], idx[N + M], n, m, d;

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 (xx[ii[j]] == xx[i_])
				j++;
			else if (xx[ii[j]] < xx[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;
	}
}

long long st[N_ * 2], pp[N_ * 2], qq[N_ * 2]; int sz[N_ * 2], n_;

void build() {
	int i;

	n_ = 1;
	while (n_ < n + m)
		n_ <<= 1;
	for (i = 0; i < n_ * 2; i++)
		st[i] = -INF, pp[i] = -INF, qq[i] = -INF;
}

void pul(int i) {
	int l = i << 1, r = l | 1;

	sz[i] = sz[l] + sz[r];
	pp[i] = max(pp[l], pp[r] + (long long) sz[l] * d);
	qq[i] = max(qq[l] + (long long) sz[r] * d, qq[r]);
	st[i] = max(max(st[l], st[r]), qq[l] + pp[r] + d);
}

void update(int i, int x) {
	i += n_;
	sz[i]++, pp[i] = -x, qq[i] = x, st[i] = 0;
	while (i > 1)
		pul(i >>= 1);
}

int main() {
	static int ii[N + M];
	int i;

	scanf("%d%d%d", &n, &m, &d);
	for (i = 0; i < n + m; i++)
		scanf("%d", &xx[i]);
	for (i = 0; i < n + m; i++)
		ii[i] = i;
	sort(ii, 0, n + m);
	for (i = 0; i < n + m; i++)
		idx[ii[i]] = i;
	build();
	for (i = 0; i < n; i++)
		update(idx[i], xx[i]);
	for (i = n; i < n + m; i++) {
		update(idx[i], xx[i]);
		printf("%lld%s ", st[1] / 2, st[1] % 2 == 0 ? "" : ".5");
	}
	printf("\n");
	return 0;
}

Compilation message (stderr)

Main.c: In function 'main':
Main.c:69:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   69 |  scanf("%d%d%d", &n, &m, &d);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.c:71:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   71 |   scanf("%d", &xx[i]);
      |   ^~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 14 / 14
• Subtask 3: 35 / 35
• Subtask 4: 41 / 41