oj.uz

Submission #106157

# Submission time Handle Problem Language Result Execution time Memory
106157 2019-04-16T22:23:45 Z luciocf Pipes (BOI13_pipes) C++14
74.0741 / 100
 302 ms 23244 KB 
#include <bits/stdc++.h>

using namespace std;

const int maxn = 1e5+10;
const int maxm = 5e5+10;

typedef pair<int, int> pii;

int a[maxn], cur[maxn];

int edge[maxn], costEdge[maxm];

vector<pii> grafo[maxn];

void dfs(int u, int p)
{
	for (auto pp: grafo[u])
	{
		int v = pp.first, e = pp.second;
		if (v == p) continue;

		edge[v] = e;

		dfs(v, u);

		cur[u] += costEdge[e]/2;
	}

	if (u != 1)
	{
		costEdge[edge[u]] = 2*(a[u]-cur[u]);
		cur[u] = a[u];
	}
}

int main(void)
{
	int n, m;
	scanf("%d %d", &n, &m);

	for (int i = 1; i <= n; i++)
		scanf("%d", &a[i]);

	for (int i = 1; i <= m; i++)
	{
		int u, v;
		scanf("%d %d", &u, &v);

		grafo[u].push_back({v, i});
		grafo[v].push_back({u, i});
	}

	if (m != n-1)
	{
		printf("0\n");
		return 0;
	}

	dfs(1, 0);

	if (cur[1] != a[1]) printf("0\n");
	else
	{
		for (int i = 1; i <= m; i++)
			printf("%d\n", costEdge[i]);
	}
}

Compilation message

pipes.cpp: In function 'int main()':
pipes.cpp:40:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &m);
  ~~~~~^~~~~~~~~~~~~~~~~
pipes.cpp:43:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &a[i]);
   ~~~~~^~~~~~~~~~~~~
pipes.cpp:48:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d", &u, &v);
   ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 2688 KB Output is correct
2 Correct 4 ms 2688 KB Output is correct
3 Correct 6 ms 2688 KB Output is correct
4 Correct 89 ms 8440 KB Output is correct
5 Correct 4 ms 2688 KB Output is correct
6 Correct 4 ms 2688 KB Output is correct
7 Correct 4 ms 2688 KB Output is correct
8 Correct 4 ms 2688 KB Output is correct
9 Correct 4 ms 2816 KB Output is correct
10 Correct 4 ms 2688 KB Output is correct
11 Correct 4 ms 2688 KB Output is correct
12 Correct 4 ms 2736 KB Output is correct
13 Correct 66 ms 7272 KB Output is correct
14 Correct 77 ms 8060 KB Output is correct
15 Correct 85 ms 8400 KB Output is correct
16 Correct 65 ms 7520 KB Output is correct
17 Correct 83 ms 8440 KB Output is correct
18 Correct 79 ms 8440 KB Output is correct
19 Correct 96 ms 11040 KB Output is correct
20 Correct 4 ms 2688 KB Output is correct
21 Correct 4 ms 2688 KB Output is correct
22 Correct 105 ms 8444 KB Output is correct
23 Correct 65 ms 7288 KB Output is correct
24 Correct 87 ms 8440 KB Output is correct
25 Correct 75 ms 7672 KB Output is correct

Subtask #2
44.0740740741 / 70.0

# Verdict Execution time Memory Grader output
1 Incorrect 15 ms 2732 KB Output isn't correct
2 Incorrect 4 ms 2688 KB Output isn't correct
3 Correct 58 ms 7848 KB Output is correct
4 Correct 67 ms 7928 KB Output is correct
5 Correct 69 ms 8184 KB Output is correct
6 Correct 302 ms 23160 KB Output is correct
7 Incorrect 4 ms 2688 KB Output isn't correct
8 Incorrect 4 ms 2688 KB Output isn't correct
9 Correct 5 ms 2688 KB Output is correct
10 Correct 5 ms 2688 KB Output is correct
11 Correct 4 ms 2688 KB Output is correct
12 Correct 5 ms 2688 KB Output is correct
13 Correct 5 ms 2688 KB Output is correct
14 Incorrect 4 ms 2688 KB Output isn't correct
15 Incorrect 5 ms 2688 KB Output isn't correct
16 Incorrect 5 ms 2688 KB Output isn't correct
17 Correct 5 ms 2688 KB Output is correct
18 Correct 4 ms 2688 KB Output is correct
19 Correct 5 ms 2688 KB Output is correct
20 Correct 6 ms 2816 KB Output is correct
21 Correct 5 ms 2816 KB Output is correct
22 Incorrect 5 ms 2688 KB Output isn't correct
23 Incorrect 74 ms 7032 KB Output isn't correct
24 Incorrect 80 ms 8060 KB Output isn't correct
25 Correct 61 ms 7928 KB Output is correct
26 Correct 67 ms 7976 KB Output is correct
27 Correct 85 ms 7800 KB Output is correct
28 Correct 85 ms 8412 KB Output is correct
29 Correct 222 ms 19420 KB Output is correct
30 Incorrect 70 ms 7672 KB Output isn't correct
31 Incorrect 72 ms 7808 KB Output isn't correct
32 Incorrect 60 ms 6648 KB Output isn't correct
33 Correct 63 ms 8056 KB Output is correct
34 Correct 61 ms 8056 KB Output is correct
35 Correct 62 ms 7928 KB Output is correct
36 Correct 64 ms 8312 KB Output is correct
37 Correct 301 ms 23244 KB Output is correct
38 Incorrect 59 ms 7928 KB Output isn't correct
39 Incorrect 72 ms 6840 KB Output isn't correct
40 Incorrect 80 ms 8056 KB Output isn't correct
41 Correct 83 ms 7800 KB Output is correct
42 Correct 76 ms 7836 KB Output is correct
43 Correct 113 ms 7800 KB Output is correct
44 Correct 71 ms 8056 KB Output is correct
45 Correct 261 ms 20472 KB Output is correct
46 Incorrect 69 ms 6272 KB Output isn't correct
47 Incorrect 89 ms 8076 KB Output isn't correct
48 Incorrect 81 ms 7928 KB Output isn't correct
49 Correct 60 ms 6524 KB Output is correct
50 Correct 78 ms 8056 KB Output is correct
51 Correct 67 ms 8056 KB Output is correct
52 Correct 73 ms 7824 KB Output is correct
53 Correct 268 ms 20496 KB Output is correct
54 Incorrect 62 ms 7800 KB Output isn't correct