Submission #829381

#	Time	Username	Problem	Language	Result	Execution time	Memory
829381		rainboy	Topical (NOI23_topical)	C11	100 / 100	332 ms	58776 KiB

Main

#include <stdio.h>

#define N	1000000
#define M	1000000

unsigned int X = 12345;

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

int *vv;

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 (vv[ii[j]] == vv[i_])
				j++;
			else if (vv[ii[j]] < vv[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 mem[N * 3], *ptr = mem;
	static int *aa[M], *bb[M], *ii[M], hh[M], dd[N], qu[N];
	static long long cc[M];
	int n, m, cnt, h, i, j;

	scanf("%d%d", &n, &m);
	for (j = 0; j < m; j++) {
		aa[j] = ptr, ptr += n;
		bb[j] = ptr, ptr += n;
		ii[j] = ptr, ptr += n;
	}
	for (i = 0; i < n; i++)
		for (j = 0; j < m; j++)
			scanf("%d", &aa[j][i]);
	for (i = 0; i < n; i++)
		for (j = 0; j < m; j++)
			scanf("%d", &bb[j][i]);
	for (j = 0; j < m; j++) {
		for (i = 0; i < n; i++)
			ii[j][i] = i;
		vv = aa[j], sort(ii[j], 0, n);
	}
	for (i = 0; i < n; i++)
		dd[i] = m;
	cnt = 0;
	for (j = 0; j < m; j++)
		while (hh[j] < n && aa[j][i = ii[j][hh[j]]] <= cc[j]) {
			if (--dd[i] == 0)
				qu[cnt++] = i;
			hh[j]++;
		}
	for (h = 0; h < cnt; h++) {
		i = qu[h];
		for (j = 0; j < m; j++)
			cc[j] += bb[j][i];
		for (j = 0; j < m; j++)
			while (hh[j] < n && aa[j][i = ii[j][hh[j]]] <= cc[j]) {
				if (--dd[i] == 0)
					qu[cnt++] = i;
				hh[j]++;
			}
	}
	printf("%d\n", cnt);
	return 0;
}

Compilation message (stderr)

Main.c: In function 'main':
Main.c:39:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |  scanf("%d%d", &n, &m);
      |  ^~~~~~~~~~~~~~~~~~~~~
Main.c:47:4: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |    scanf("%d", &aa[j][i]);
      |    ^~~~~~~~~~~~~~~~~~~~~~
Main.c:50:4: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |    scanf("%d", &bb[j][i]);
      |    ^~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 12 / 12
• Subtask 2: 28 / 28
• Subtask 3: 21 / 21
• Subtask 4: 39 / 39