oj.uz

Submission #518898

# Submission time Handle Problem Language Result Execution time Memory
518898 2022-01-25T04:47:13 Z blue Pipes (BOI13_pipes) C++17
65 / 100
 192 ms 23504 KB 
#include <iostream>
#include <vector>
#include <queue>
using namespace std;

using ll = long long;
using pl = pair<ll, ll>;
using vpl = vector<pl>;
using pii = pair<int, int>;
using vi = vector<int>;
using vl = vector<ll>;

const int mx = 100'000;
const int emx = 500'000;

vl c(1+mx);
vector<pii> edge[1+mx];

vi deg(1+mx, 0);
vi visit(1+emx, 0);

vector<ll> ans(1+emx);

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	
	int N, M;
	cin >> N >> M;

	for(int i = 1; i <= N; i++) cin >> c[i];

	for(int j = 1; j <= M; j++)
	{
		int u, v;
		cin >> u >> v;
		edge[u].push_back({v, j});
		edge[v].push_back({u, j});
		deg[u]++;
		deg[v]++;
	}

	if(M > N)
	{
		cout << "0\n";
		return 0;
	}

	queue<int> tbv;
	for(int i = 1; i <= N; i++)
	{
		if(deg[i] == 1)
		{
			tbv.push(i);
		}
	}

	int endv = -1;

	while(!tbv.empty())
	{
		int u = tbv.front();
		tbv.pop();

		// cerr << "u = " << u << '\n';

		int elim = 0;

		for(auto ed: edge[u])
		{
			int v = ed.first;

			if(visit[ed.second]) continue;

			visit[ed.second] = 1;

			deg[v]--;

			elim = 1;

			if(deg[v] <= 1)
			{
				tbv.push(v);
			}
			ans[ed.second] = 2*c[u];
			// cerr << ed.first << ' ' << ed.second << " : " << 2*c[u] << '\n';

			c[v] -= c[u];
			c[u] -= c[u];

		}

		if(!elim)
		{
			if(M == N-1)
			{
				if(c[u] != 0)
				{
					cout << "0\n";
					return 0;
				}
			}
		}
	}


	for(int e = 1; e <= M; e++)
	{
		cout << ans[e] << '\n';
	}

}

Compilation message

pipes.cpp: In function 'int main()':
pipes.cpp:59:6: warning: unused variable 'endv' [-Wunused-variable]
   59 |  int endv = -1;
      |      ^~~~

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9676 KB Output is correct
2 Correct 6 ms 9680 KB Output is correct
3 Correct 5 ms 9760 KB Output is correct
4 Correct 61 ms 14008 KB Output is correct
5 Correct 4 ms 9680 KB Output is correct
6 Correct 5 ms 9684 KB Output is correct
7 Correct 5 ms 9676 KB Output is correct
8 Correct 5 ms 9680 KB Output is correct
9 Correct 5 ms 9688 KB Output is correct
10 Correct 5 ms 9680 KB Output is correct
11 Correct 5 ms 9692 KB Output is correct
12 Correct 5 ms 9684 KB Output is correct
13 Correct 49 ms 13156 KB Output is correct
14 Correct 74 ms 13736 KB Output is correct
15 Correct 56 ms 14076 KB Output is correct
16 Correct 47 ms 13396 KB Output is correct
17 Correct 63 ms 14076 KB Output is correct
18 Correct 79 ms 14084 KB Output is correct
19 Correct 55 ms 13344 KB Output is correct
20 Correct 4 ms 9708 KB Output is correct
21 Correct 5 ms 9676 KB Output is correct
22 Correct 64 ms 14068 KB Output is correct
23 Correct 44 ms 13104 KB Output is correct
24 Correct 57 ms 14092 KB Output is correct
25 Correct 52 ms 13252 KB Output is correct

Subtask #2
35.0 / 70.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 9676 KB Output isn't correct
2 Incorrect 7 ms 9676 KB Output isn't correct
3 Incorrect 52 ms 13396 KB Output isn't correct
4 Correct 42 ms 12964 KB Output is correct
5 Correct 38 ms 13172 KB Output is correct
6 Correct 192 ms 23484 KB Output is correct
7 Incorrect 5 ms 9676 KB Output isn't correct
8 Incorrect 5 ms 9676 KB Output isn't correct
9 Incorrect 4 ms 9676 KB Output isn't correct
10 Correct 5 ms 9676 KB Output is correct
11 Correct 6 ms 9676 KB Output is correct
12 Correct 7 ms 9680 KB Output is correct
13 Correct 6 ms 9676 KB Output is correct
14 Incorrect 6 ms 9676 KB Output isn't correct
15 Incorrect 5 ms 9676 KB Output isn't correct
16 Incorrect 5 ms 9676 KB Output isn't correct
17 Incorrect 7 ms 9676 KB Output isn't correct
18 Correct 5 ms 9684 KB Output is correct
19 Correct 7 ms 9692 KB Output is correct
20 Correct 4 ms 9684 KB Output is correct
21 Correct 5 ms 9812 KB Output is correct
22 Incorrect 6 ms 9684 KB Output isn't correct
23 Incorrect 39 ms 12708 KB Output isn't correct
24 Incorrect 51 ms 13420 KB Output isn't correct
25 Incorrect 51 ms 13468 KB Output isn't correct
26 Correct 41 ms 12912 KB Output is correct
27 Correct 42 ms 12852 KB Output is correct
28 Correct 47 ms 13252 KB Output is correct
29 Correct 132 ms 20888 KB Output is correct
30 Incorrect 61 ms 13096 KB Output isn't correct
31 Incorrect 61 ms 13196 KB Output isn't correct
32 Incorrect 66 ms 13844 KB Output isn't correct
33 Incorrect 54 ms 13452 KB Output isn't correct
34 Correct 45 ms 12876 KB Output is correct
35 Correct 43 ms 12956 KB Output is correct
36 Correct 41 ms 13168 KB Output is correct
37 Correct 156 ms 23504 KB Output is correct
38 Incorrect 64 ms 13284 KB Output isn't correct
39 Incorrect 64 ms 14020 KB Output isn't correct
40 Incorrect 56 ms 13504 KB Output isn't correct
41 Incorrect 73 ms 13152 KB Output isn't correct
42 Correct 53 ms 12796 KB Output is correct
43 Correct 37 ms 12748 KB Output is correct
44 Correct 37 ms 13172 KB Output is correct
45 Correct 159 ms 22084 KB Output is correct
46 Incorrect 66 ms 13108 KB Output isn't correct
47 Incorrect 70 ms 13484 KB Output isn't correct
48 Incorrect 78 ms 13092 KB Output isn't correct
49 Incorrect 51 ms 13740 KB Output isn't correct
50 Correct 43 ms 13036 KB Output is correct
51 Correct 41 ms 13296 KB Output is correct
52 Correct 38 ms 13192 KB Output is correct
53 Correct 149 ms 21708 KB Output is correct
54 Incorrect 61 ms 13764 KB Output isn't correct