oj.uz

Submission #1111324

# Submission time Handle Problem Language Result Execution time Memory
1111324 2024-11-12T05:30:03 Z sleepntsheep Airplane (NOI23_airplane) C
100 / 100
 310 ms 21736 KB 
#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int max(int i, int j) { return i > j ? i : j; }
int min(int i, int j) { return i < j ? i : j; }

#define N 200005

const int oo = 1e9;

int n, m, a[N], *eh[N], eo[N], to, dp[N], dq[N], *focus, t[N * 2], z = oo;

int Lt(int i, int j) { return focus[i] < focus[j]; }
int Min(int i, int j) { return Lt(i, j) ? i : j; }
void pul(int i) { t[i] = Min(t[i * 2], t[i * 2 + 1]); }
void fix(int i) { for (i += n; i /= 2; ) pul(i); }

void pus(int i, int j) {
	int o = eo[i]++;
	if (!o) eh[i] = (int*)malloc(sizeof **eh * 2);
	else if (!(o & (o - 1))) eh[i] = (int*)realloc(eh[i], 2 * o * sizeof **eh);
	eh[i][o] = j;
}

void Dijkstra(int src, int *dp) {
	focus = dp;
	for (int i = 0; i < n; ++i) dp[i] = oo, t[i + n] = i;
	dp[src] = 0;
	dp[n] = oo + 1;
	for (int i = n; --i;) pul(i);
	for (int i = 1; i <= n; ++i) {
		int u = t[1];
		t[u + n] = n;
		fix(u);
		
		for (int v, j = 0; j < eo[u]; ++j) {
			v = eh[u][j];
			int nc = max(dp[u] + 1, a[v]); 
			if (t[v + n] == v && nc < dp[v]) {
				dp[v] = nc;
				fix(v);
			}
		}
	}
}

int main() {
	srand(time(0));
	scanf("%d%d", &n, &m);
	for (int i = 0; i < n; ++i) scanf("%d", a + i);
	for (int u, v, i = 0; i < m; ++i)
		scanf("%d%d", &u, &v), pus(--u, --v), pus(v, u);

	Dijkstra(0, dp);
	Dijkstra(n - 1, dq);

	for (int i = 0; i < n; ++i) {
		int x = 2 * max(dp[i], dq[i]);
		z = min(z, x);
		for (int k = 0; k < eo[i]; ++k) {
			int j = eh[i][k];
			x = 2 * max(dp[i], dq[j]) + 1;
			z = min(z, x);
		}
	}
	
	printf("%d", z);
}

Compilation message

Main.c: In function 'main':
Main.c:50:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |  scanf("%d%d", &n, &m);
      |  ^~~~~~~~~~~~~~~~~~~~~
Main.c:51:30: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |  for (int i = 0; i < n; ++i) scanf("%d", a + i);
      |                              ^~~~~~~~~~~~~~~~~~
Main.c:53:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   53 |   scanf("%d%d", &u, &v), pus(--u, --v), pus(v, u);
      |   ^~~~~~~~~~~~~~~~~~~~~

Subtask #1
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2384 KB Output is correct
2 Correct 114 ms 16084 KB Output is correct
3 Correct 117 ms 16340 KB Output is correct
4 Correct 116 ms 16712 KB Output is correct
5 Correct 122 ms 16968 KB Output is correct
6 Correct 117 ms 17164 KB Output is correct
7 Correct 126 ms 17224 KB Output is correct
8 Correct 1 ms 2384 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2384 KB Output is correct
2 Correct 1 ms 2384 KB Output is correct
3 Correct 1 ms 2384 KB Output is correct
4 Correct 1 ms 2384 KB Output is correct
5 Correct 1 ms 2436 KB Output is correct
6 Correct 2 ms 2640 KB Output is correct
7 Correct 2 ms 2640 KB Output is correct
8 Correct 2 ms 2896 KB Output is correct
9 Correct 2 ms 2496 KB Output is correct
10 Correct 2 ms 2640 KB Output is correct
11 Correct 2 ms 2640 KB Output is correct
12 Correct 2 ms 2640 KB Output is correct
13 Correct 2 ms 2640 KB Output is correct
14 Correct 4 ms 2640 KB Output is correct
15 Correct 2 ms 2640 KB Output is correct
16 Correct 3 ms 2640 KB Output is correct
17 Correct 2 ms 2640 KB Output is correct
18 Correct 1 ms 2384 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2384 KB Output is correct
2 Correct 1 ms 2384 KB Output is correct
3 Correct 1 ms 2384 KB Output is correct
4 Correct 1 ms 2384 KB Output is correct
5 Correct 1 ms 2436 KB Output is correct
6 Correct 2 ms 2640 KB Output is correct
7 Correct 2 ms 2640 KB Output is correct
8 Correct 2 ms 2896 KB Output is correct
9 Correct 2 ms 2496 KB Output is correct
10 Correct 2 ms 2640 KB Output is correct
11 Correct 2 ms 2640 KB Output is correct
12 Correct 2 ms 2640 KB Output is correct
13 Correct 2 ms 2640 KB Output is correct
14 Correct 4 ms 2640 KB Output is correct
15 Correct 2 ms 2640 KB Output is correct
16 Correct 3 ms 2640 KB Output is correct
17 Correct 2 ms 2640 KB Output is correct
18 Correct 1 ms 2384 KB Output is correct
19 Correct 2 ms 2640 KB Output is correct
20 Correct 2 ms 2640 KB Output is correct
21 Correct 2 ms 2640 KB Output is correct
22 Correct 3 ms 2640 KB Output is correct
23 Correct 2 ms 2652 KB Output is correct
24 Correct 3 ms 2640 KB Output is correct
25 Correct 2 ms 2556 KB Output is correct
26 Correct 2 ms 2640 KB Output is correct
27 Correct 2 ms 2640 KB Output is correct
28 Correct 3 ms 2640 KB Output is correct
29 Correct 3 ms 2640 KB Output is correct
30 Correct 2 ms 2640 KB Output is correct

Subtask #4
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2384 KB Output is correct
2 Correct 114 ms 16084 KB Output is correct
3 Correct 117 ms 16340 KB Output is correct
4 Correct 116 ms 16712 KB Output is correct
5 Correct 122 ms 16968 KB Output is correct
6 Correct 117 ms 17164 KB Output is correct
7 Correct 126 ms 17224 KB Output is correct
8 Correct 1 ms 2384 KB Output is correct
9 Correct 1 ms 2384 KB Output is correct
10 Correct 1 ms 2384 KB Output is correct
11 Correct 1 ms 2384 KB Output is correct
12 Correct 1 ms 2384 KB Output is correct
13 Correct 1 ms 2436 KB Output is correct
14 Correct 2 ms 2640 KB Output is correct
15 Correct 2 ms 2640 KB Output is correct
16 Correct 2 ms 2896 KB Output is correct
17 Correct 2 ms 2496 KB Output is correct
18 Correct 2 ms 2640 KB Output is correct
19 Correct 2 ms 2640 KB Output is correct
20 Correct 2 ms 2640 KB Output is correct
21 Correct 2 ms 2640 KB Output is correct
22 Correct 4 ms 2640 KB Output is correct
23 Correct 2 ms 2640 KB Output is correct
24 Correct 3 ms 2640 KB Output is correct
25 Correct 2 ms 2640 KB Output is correct
26 Correct 1 ms 2384 KB Output is correct
27 Correct 2 ms 2640 KB Output is correct
28 Correct 2 ms 2640 KB Output is correct
29 Correct 2 ms 2640 KB Output is correct
30 Correct 3 ms 2640 KB Output is correct
31 Correct 2 ms 2652 KB Output is correct
32 Correct 3 ms 2640 KB Output is correct
33 Correct 2 ms 2556 KB Output is correct
34 Correct 2 ms 2640 KB Output is correct
35 Correct 2 ms 2640 KB Output is correct
36 Correct 3 ms 2640 KB Output is correct
37 Correct 3 ms 2640 KB Output is correct
38 Correct 2 ms 2640 KB Output is correct
39 Correct 169 ms 17224 KB Output is correct
40 Correct 148 ms 16388 KB Output is correct
41 Correct 134 ms 16300 KB Output is correct
42 Correct 132 ms 16456 KB Output is correct
43 Correct 145 ms 16456 KB Output is correct
44 Correct 172 ms 16388 KB Output is correct
45 Correct 146 ms 16200 KB Output is correct
46 Correct 142 ms 16212 KB Output is correct
47 Correct 150 ms 16260 KB Output is correct
48 Correct 146 ms 16208 KB Output is correct
49 Correct 162 ms 17236 KB Output is correct
50 Correct 167 ms 16968 KB Output is correct
51 Correct 178 ms 16864 KB Output is correct
52 Correct 186 ms 19016 KB Output is correct
53 Correct 158 ms 17736 KB Output is correct
54 Correct 156 ms 17736 KB Output is correct
55 Correct 174 ms 17992 KB Output is correct
56 Correct 221 ms 20604 KB Output is correct
57 Correct 252 ms 20808 KB Output is correct
58 Correct 269 ms 21576 KB Output is correct
59 Correct 310 ms 21736 KB Output is correct
60 Correct 224 ms 21612 KB Output is correct
61 Correct 245 ms 21320 KB Output is correct
62 Correct 239 ms 20408 KB Output is correct
63 Correct 216 ms 20552 KB Output is correct
64 Correct 201 ms 20468 KB Output is correct
65 Correct 225 ms 20552 KB Output is correct
66 Correct 208 ms 20648 KB Output is correct
67 Correct 280 ms 20640 KB Output is correct