Submission #832667

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
832667	2023-08-21T13:29:25 Z	rainboy	Fuel Station (NOI20_fuelstation)	C	39 / 100	120 ms	31592 KB

FuelStation

#include <stdio.h>

#define N	300001
#define N_	(1 << 19)	/* N_ = pow2(ceil(log2(N))) */

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], aa[N], bb[N], ii[N], idx[N], n;

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;
	}
}

long long ss[N_ * 2], pp[N_ * 2]; int n_;

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

	ss[i] = ss[l] + ss[r];
	pp[i] = max(pp[l], pp[r] - ss[l]);
}

void build() {
	int i;

	n_ = 1;
	while (n_ < n)
		n_ <<= 1;
	for (i = 0; i < n_; i++)
		if (i < n)
			ss[n_ + i] = aa[ii[i]], pp[n_ + i] = xx[ii[i]];
		else
			ss[n_ + i] = 0, pp[n_ + i] = 0;
	for (i = n_ - 1; i > 0; i--)
		pul(i);
}

void update(int i) {
	ss[i += n_] = 0;
	while (i > 1)
		pul(i >>= 1);
}

int main() {
	int x_, i;

	scanf("%d%d", &n, &x_);
	for (i = 0; i < n; i++)
		scanf("%d%d%d", &xx[i], &aa[i], &bb[i]);
	xx[n] = x_, aa[n] = 0, bb[n] = 0;
	n++;
	for (i = 0; i < n; i++)
		ii[i] = i;
	vv = xx, sort(ii, 0, n);
	for (i = 0; i < n; i++)
		idx[ii[i]] = i;
	build();
	vv = bb, sort(ii, 0, n);
	for (i = 0; i < n; i++) {
		if (pp[1] < bb[ii[i]]) {
			printf("%lld\n", pp[1]);
			return 0;
		}
		update(idx[ii[i]]);
	}
	printf("%lld\n", pp[1]);
	return 0;
}

Compilation message

FuelStation.c: In function 'main':
FuelStation.c:70:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   70 |  scanf("%d%d", &n, &x_);
      |  ^~~~~~~~~~~~~~~~~~~~~~
FuelStation.c:72:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   72 |   scanf("%d%d%d", &xx[i], &aa[i], &bb[i]);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1

7.0 / 7.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	1 ms	340 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	1 ms	340 KB	Output is correct
5	Correct	0 ms	340 KB	Output is correct
6	Correct	0 ms	340 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	1 ms	340 KB	Output is correct
9	Correct	0 ms	340 KB	Output is correct
10	Correct	0 ms	212 KB	Output is correct
11	Correct	0 ms	292 KB	Output is correct
12	Correct	0 ms	296 KB	Output is correct
13	Correct	1 ms	340 KB	Output is correct
14	Correct	0 ms	288 KB	Output is correct
15	Correct	0 ms	212 KB	Output is correct

Subtask #2

13.0 / 13.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	102 ms	30928 KB	Output is correct
2	Correct	110 ms	30980 KB	Output is correct
3	Correct	112 ms	30876 KB	Output is correct
4	Correct	92 ms	30924 KB	Output is correct
5	Correct	97 ms	31492 KB	Output is correct
6	Correct	102 ms	30236 KB	Output is correct
7	Correct	103 ms	30284 KB	Output is correct
8	Correct	93 ms	30912 KB	Output is correct
9	Correct	108 ms	31468 KB	Output is correct
10	Correct	92 ms	30304 KB	Output is correct
11	Correct	101 ms	30256 KB	Output is correct
12	Correct	91 ms	30956 KB	Output is correct
13	Correct	103 ms	30336 KB	Output is correct
14	Correct	105 ms	30924 KB	Output is correct
15	Correct	91 ms	30944 KB	Output is correct
16	Correct	120 ms	31552 KB	Output is correct
17	Correct	98 ms	31592 KB	Output is correct
18	Correct	102 ms	30924 KB	Output is correct
19	Correct	98 ms	30948 KB	Output is correct
20	Correct	111 ms	30924 KB	Output is correct

Subtask #3

0 / 17.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	3 ms	1156 KB	Output is correct
3	Correct	4 ms	1076 KB	Output is correct
4	Correct	4 ms	1072 KB	Output is correct
5	Correct	5 ms	1132 KB	Output is correct
6	Correct	5 ms	1140 KB	Output is correct
7	Correct	5 ms	1076 KB	Output is correct
8	Incorrect	1 ms	212 KB	Output isn't correct
9	Halted	0 ms	0 KB	-

Subtask #4

0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	3 ms	1156 KB	Output is correct
3	Correct	4 ms	1076 KB	Output is correct
4	Correct	4 ms	1072 KB	Output is correct
5	Correct	5 ms	1132 KB	Output is correct
6	Correct	5 ms	1140 KB	Output is correct
7	Correct	5 ms	1076 KB	Output is correct
8	Incorrect	1 ms	212 KB	Output isn't correct
9	Halted	0 ms	0 KB	-

Subtask #5

19.0 / 19.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	1 ms	340 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	1 ms	340 KB	Output is correct
5	Correct	0 ms	340 KB	Output is correct
6	Correct	0 ms	340 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	1 ms	340 KB	Output is correct
9	Correct	0 ms	340 KB	Output is correct
10	Correct	0 ms	212 KB	Output is correct
11	Correct	0 ms	292 KB	Output is correct
12	Correct	0 ms	296 KB	Output is correct
13	Correct	1 ms	340 KB	Output is correct
14	Correct	0 ms	288 KB	Output is correct
15	Correct	0 ms	212 KB	Output is correct
16	Correct	0 ms	212 KB	Output is correct
17	Correct	0 ms	212 KB	Output is correct
18	Correct	0 ms	212 KB	Output is correct
19	Correct	0 ms	340 KB	Output is correct
20	Correct	0 ms	212 KB	Output is correct
21	Correct	0 ms	212 KB	Output is correct
22	Correct	1 ms	212 KB	Output is correct
23	Correct	0 ms	212 KB	Output is correct
24	Correct	0 ms	212 KB	Output is correct
25	Correct	1 ms	212 KB	Output is correct
26	Correct	0 ms	212 KB	Output is correct
27	Correct	0 ms	212 KB	Output is correct
28	Correct	1 ms	212 KB	Output is correct
29	Correct	0 ms	340 KB	Output is correct
30	Correct	0 ms	212 KB	Output is correct

Subtask #6

0 / 11.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	1 ms	340 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	1 ms	340 KB	Output is correct
5	Correct	0 ms	340 KB	Output is correct
6	Correct	0 ms	340 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	1 ms	340 KB	Output is correct
9	Correct	0 ms	340 KB	Output is correct
10	Correct	0 ms	212 KB	Output is correct
11	Correct	0 ms	292 KB	Output is correct
12	Correct	0 ms	296 KB	Output is correct
13	Correct	1 ms	340 KB	Output is correct
14	Correct	0 ms	288 KB	Output is correct
15	Correct	0 ms	212 KB	Output is correct
16	Correct	1 ms	212 KB	Output is correct
17	Correct	3 ms	1156 KB	Output is correct
18	Correct	4 ms	1076 KB	Output is correct
19	Correct	4 ms	1072 KB	Output is correct
20	Correct	5 ms	1132 KB	Output is correct
21	Correct	5 ms	1140 KB	Output is correct
22	Correct	5 ms	1076 KB	Output is correct
23	Incorrect	1 ms	212 KB	Output isn't correct
24	Halted	0 ms	0 KB	-

Subtask #7

0 / 21.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	1 ms	340 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	1 ms	340 KB	Output is correct
5	Correct	0 ms	340 KB	Output is correct
6	Correct	0 ms	340 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	1 ms	340 KB	Output is correct
9	Correct	0 ms	340 KB	Output is correct
10	Correct	0 ms	212 KB	Output is correct
11	Correct	0 ms	292 KB	Output is correct
12	Correct	0 ms	296 KB	Output is correct
13	Correct	1 ms	340 KB	Output is correct
14	Correct	0 ms	288 KB	Output is correct
15	Correct	0 ms	212 KB	Output is correct
16	Correct	102 ms	30928 KB	Output is correct
17	Correct	110 ms	30980 KB	Output is correct
18	Correct	112 ms	30876 KB	Output is correct
19	Correct	92 ms	30924 KB	Output is correct
20	Correct	97 ms	31492 KB	Output is correct
21	Correct	102 ms	30236 KB	Output is correct
22	Correct	103 ms	30284 KB	Output is correct
23	Correct	93 ms	30912 KB	Output is correct
24	Correct	108 ms	31468 KB	Output is correct
25	Correct	92 ms	30304 KB	Output is correct
26	Correct	101 ms	30256 KB	Output is correct
27	Correct	91 ms	30956 KB	Output is correct
28	Correct	103 ms	30336 KB	Output is correct
29	Correct	105 ms	30924 KB	Output is correct
30	Correct	91 ms	30944 KB	Output is correct
31	Correct	120 ms	31552 KB	Output is correct
32	Correct	98 ms	31592 KB	Output is correct
33	Correct	102 ms	30924 KB	Output is correct
34	Correct	98 ms	30948 KB	Output is correct
35	Correct	111 ms	30924 KB	Output is correct
36	Correct	1 ms	212 KB	Output is correct
37	Correct	3 ms	1156 KB	Output is correct
38	Correct	4 ms	1076 KB	Output is correct
39	Correct	4 ms	1072 KB	Output is correct
40	Correct	5 ms	1132 KB	Output is correct
41	Correct	5 ms	1140 KB	Output is correct
42	Correct	5 ms	1076 KB	Output is correct
43	Incorrect	1 ms	212 KB	Output isn't correct
44	Halted	0 ms	0 KB	-