Submission #407390

#	Time	Username	Problem	Language	Result	Execution time	Memory
407390		rainboy	Nekameleoni (COCI15_nekameleoni)	C11	140 / 140	1603 ms	83144 KiB

nekameleoni

#include <stdio.h>
#include <string.h>

#define N	100000
#define N_	(1 << 17)
#define M	50
#define INF	0x3f3f3f3f

int min(int a, int b) { return a < b ? a : b; }

int aa[N], n, m;
int st[N_ * 2], iil[N_ * 2][M], iir[N_ * 2][M], kkl[N_ * 2], kkr[N_ * 2], n_;

void pul(int i) {
	static int kk[M];
	static char used[M];
	int l = i << 1, r = l | 1, hl, hr, il, ir, m_;

	st[i] = min(st[l], st[r]);
	memset(kk, 0, m * sizeof *kk);
	for (hr = 0; hr < kkr[l]; hr++) {
		ir = iir[l][hr];
		kk[aa[ir]]++;
	}
	m_ = m - kkr[l];
	for (hl = 0, hr = kkr[l]; hl < kkl[r]; hl++) {
		il = iil[r][hl];
		if (kk[aa[il]]++ == 0)
			m_--;
		while (hr > 0 && m_ == 0)
			if (--kk[aa[iir[l][--hr]]] == 0)
				m_++;
		if (hr < kkr[l])
			st[i] = min(st[i], il - iir[l][hr] + 1);
	}
	memset(used, 0, m * sizeof *used), kkl[i] = 0;
	for (hl = 0; hl < kkl[l]; hl++) {
		il = iil[l][hl];
		used[aa[il]] = 1, iil[i][kkl[i]++] = il;
	}
	for (hl = 0; hl < kkl[r]; hl++) {
		il = iil[r][hl];
		if (!used[aa[il]])
			used[aa[il]] = 1, iil[i][kkl[i]++] = il;
	}
	memset(used, 0, m * sizeof *used), kkr[i] = 0;
	for (hr = 0; hr < kkr[r]; hr++) {
		ir = iir[r][hr];
		used[aa[ir]] = 1, iir[i][kkr[i]++] = ir;
	}
	for (hr = 0; hr < kkr[l]; hr++) {
		ir = iir[l][hr];
		if (!used[aa[ir]])
			used[aa[ir]] = 1, iir[i][kkr[i]++] = ir;
	}
}

void build() {
	int i;

	n_ = 1;
	while (n_ < n)
		n_ <<= 1;
	for (i = 0; i < n_; i++) {
		if (i < n)
			iil[n_ + i][kkl[n_ + i]++] = iir[n_ + i][kkr[n_ + i]++] = i;
		st[n_ + i] = i >= n || m != 1 ? INF : 1;
	}
	for (i = n_ - 1; i > 0; i--)
		pul(i);
}

void update(int i, int a) {
	aa[i] = a;
	i += n_;
	while (i > 1)
		pul(i >>= 1);
}

int main() {
	int q, i;

	scanf("%d%d%d", &n, &m, &q);
	for (i = 0; i < n; i++)
		scanf("%d", &aa[i]), aa[i]--;
	build();
	while (q--) {
		int t;

		scanf("%d", &t);
		if (t == 2)
			printf("%d\n", st[1] == INF ? -1 : st[1]);
		else {
			int a;

			scanf("%d%d", &i, &a), i--, a--;
			update(i, a);
		}
	}
	return 0;
}

Compilation message (stderr)

nekameleoni.c: In function 'main':
nekameleoni.c:83:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   83 |  scanf("%d%d%d", &n, &m, &q);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~
nekameleoni.c:85:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   85 |   scanf("%d", &aa[i]), aa[i]--;
      |   ^~~~~~~~~~~~~~~~~~~
nekameleoni.c:90:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   90 |   scanf("%d", &t);
      |   ^~~~~~~~~~~~~~~
nekameleoni.c:96:4: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   96 |    scanf("%d%d", &i, &a), i--, a--;
      |    ^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 14 / 14
• Subtask 4: 14 / 14
• Subtask 5: 14 / 14
• Subtask 6: 14 / 14
• Subtask 7: 14 / 14
• Subtask 8: 14 / 14
• Subtask 9: 14 / 14
• Subtask 10: 14 / 14