oj.uz

Submission #730989

# Submission time Handle Problem Language Result Execution time Memory
730989 2023-04-26T17:41:32 Z rainboy Cheap flights (LMIO18_pigus_skrydziai) C
100 / 100
 855 ms 33108 KB 
#include <stdio.h>
#include <stdlib.h>

#define N	300000

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

int *ej[N], *ew[N], eo[N];

void append(int i, int j, int w) {
	int o = eo[i]++;

	if (o >= 2 && (o & o - 1) == 0) {
		ej[i] = (int *) realloc(ej[i], o * 2 * sizeof *ej[i]);
		ew[i] = (int *) realloc(ew[i], o * 2 * sizeof *ew[i]);
	}
	ej[i][o] = j, ew[i][o] = w;
}

int main() {
	static int ww[N];
	int n, m, h, i, j, k, w, w_, o, o_;
	long long sum, ans;

	scanf("%d%d", &n, &m);
	for (i = 0; i < n; i++) {
		ej[i] = (int *) malloc(2 * sizeof *ej[i]);
		ew[i] = (int *) malloc(2 * sizeof *ew[i]);
	}
	for (h = 0; h < m; h++) {
		scanf("%d%d%d", &i, &j, &w), i--, j--;
		append(i, j, w), append(j, i, w);
	}
	ans = 0;
	for (i = 0; i < n; i++) {
		sum = 0;
		for (o = eo[i]; o--; ) {
			j = ej[i][o], w = ew[i][o];
			sum += w;
			ww[j] = w;
		}
		ans = max(ans, sum);
		for (o = eo[i]; o--; ) {
			j = ej[i][o], w = ew[i][o];
			if (eo[j] < eo[i] || eo[j] == eo[i] && j < i)
				for (o_ = eo[j]; o_--; ) {
					k = ej[j][o_], w_ = ew[j][o_];
					if (k != i)
						ans = max(ans, (long long) w + w_ + ww[k]);
				}
		}
		for (o = eo[i]; o--; ) {
			j = ej[i][o];
			ww[j] = 0;
		}
	}
	printf("%lld\n", ans);
	return 0;
}

Compilation message

pigus_skrydziai.c: In function 'append':
pigus_skrydziai.c:13:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   13 |  if (o >= 2 && (o & o - 1) == 0) {
      |                     ~~^~~
pigus_skrydziai.c: In function 'main':
pigus_skrydziai.c:45:40: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   45 |    if (eo[j] < eo[i] || eo[j] == eo[i] && j < i)
      |                         ~~~~~~~~~~~~~~~^~~~~~~~
pigus_skrydziai.c:25:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |  scanf("%d%d", &n, &m);
      |  ^~~~~~~~~~~~~~~~~~~~~
pigus_skrydziai.c:31:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |   scanf("%d%d%d", &i, &j, &w), i--, j--;
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 11 ms 980 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 352 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 1 ms 292 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 376 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 11 ms 980 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 352 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 1 ms 292 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 376 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 384 ms 20232 KB Output is correct
23 Correct 855 ms 17104 KB Output is correct
24 Correct 9 ms 1108 KB Output is correct
25 Correct 4 ms 596 KB Output is correct
26 Correct 3 ms 596 KB Output is correct
27 Correct 1 ms 344 KB Output is correct
28 Correct 179 ms 8560 KB Output is correct
29 Correct 70 ms 3148 KB Output is correct
30 Correct 124 ms 4780 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 234 ms 19044 KB Output is correct
34 Correct 191 ms 15820 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 92 ms 26080 KB Output is correct
2 Correct 152 ms 26088 KB Output is correct
3 Correct 43 ms 10240 KB Output is correct
4 Correct 100 ms 20688 KB Output is correct
5 Correct 226 ms 23700 KB Output is correct
6 Correct 115 ms 3540 KB Output is correct
7 Correct 86 ms 26132 KB Output is correct
8 Correct 104 ms 30564 KB Output is correct
9 Correct 19 ms 26064 KB Output is correct
10 Correct 115 ms 3604 KB Output is correct
11 Correct 87 ms 18724 KB Output is correct
12 Correct 223 ms 6816 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 53 ms 3864 KB Output is correct

Subtask #4
47.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 92 ms 26080 KB Output is correct
2 Correct 152 ms 26088 KB Output is correct
3 Correct 43 ms 10240 KB Output is correct
4 Correct 100 ms 20688 KB Output is correct
5 Correct 226 ms 23700 KB Output is correct
6 Correct 115 ms 3540 KB Output is correct
7 Correct 86 ms 26132 KB Output is correct
8 Correct 104 ms 30564 KB Output is correct
9 Correct 19 ms 26064 KB Output is correct
10 Correct 115 ms 3604 KB Output is correct
11 Correct 87 ms 18724 KB Output is correct
12 Correct 223 ms 6816 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 53 ms 3864 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 212 KB Output is correct
20 Correct 11 ms 980 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 0 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 0 ms 352 KB Output is correct
26 Correct 0 ms 340 KB Output is correct
27 Correct 0 ms 340 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 1 ms 292 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 1 ms 376 KB Output is correct
34 Correct 0 ms 212 KB Output is correct
35 Correct 0 ms 212 KB Output is correct
36 Correct 384 ms 20232 KB Output is correct
37 Correct 855 ms 17104 KB Output is correct
38 Correct 9 ms 1108 KB Output is correct
39 Correct 4 ms 596 KB Output is correct
40 Correct 3 ms 596 KB Output is correct
41 Correct 1 ms 344 KB Output is correct
42 Correct 179 ms 8560 KB Output is correct
43 Correct 70 ms 3148 KB Output is correct
44 Correct 124 ms 4780 KB Output is correct
45 Correct 1 ms 340 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 234 ms 19044 KB Output is correct
48 Correct 191 ms 15820 KB Output is correct
49 Correct 88 ms 10188 KB Output is correct
50 Correct 94 ms 8932 KB Output is correct
51 Correct 187 ms 16092 KB Output is correct
52 Correct 204 ms 12616 KB Output is correct
53 Correct 55 ms 15640 KB Output is correct
54 Correct 339 ms 14944 KB Output is correct
55 Correct 186 ms 33108 KB Output is correct
56 Correct 116 ms 21952 KB Output is correct
57 Correct 139 ms 27732 KB Output is correct
58 Correct 59 ms 7376 KB Output is correct
59 Correct 182 ms 15080 KB Output is correct
60 Correct 129 ms 12148 KB Output is correct
61 Correct 131 ms 10328 KB Output is correct