oj.uz

Submission #292865

# Submission time Handle Problem Language Result Execution time Memory
292865 2020-09-07T14:24:09 Z luciocf Power Plant (JOI20_power) C++14
100 / 100
 285 ms 28664 KB 
#include <bits/stdc++.h>

using namespace std;

const int maxn = 2e5+10;

int tem[maxn];

int dp[maxn];
int soma[maxn];

vector<int> grafo[maxn];

void dfs(int u, int p)
{
	if (tem[u] && p) dp[u] = 2;

	int mx = 0;

	for (auto v: grafo[u])
	{
		if (v == p) continue;

		dfs(v, u);

		mx = max(mx, dp[v]-tem[v]);

		soma[u] += dp[v]-tem[v];
	}

	if (p == 0) dp[u] = max(dp[u], mx);
	else dp[u] = max(dp[u], soma[u]);
}

int ans;

void solve(int u, int p)
{
	if (tem[u]) ans = max(ans, dp[u]+1);

	for (auto v: grafo[u])
	{
		if (v == p) continue;

		int dp_ant = dp[u], soma_ant = soma[u];

		soma[u] -= (dp[v]-tem[v]);

		if (tem[u]) dp[u] = max(2, soma[u]);
		else dp[u] = max(0, soma[u]);

		soma[v] += dp[u]-tem[u];

		if (tem[v])
		{
			dp[v] = 0;
			for (auto w: grafo[v])
				dp[v] = max(dp[v], dp[w]-tem[w]);
		}
		else dp[v] = max(0, soma[v]);

		solve(v, u);

		dp[u] = dp_ant, soma[u] = soma_ant;
	}
}

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

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

		grafo[u].push_back(v);
		grafo[v].push_back(u);
	}

	for (int i = 1; i <= n; i++)
	{
		char c;
		scanf(" %c", &c);

		if (c == '1') tem[i] = 1;
	}

	int r = 0;
	for (int i = 1; i <= n; i++)
		if (tem[i])
			r = i;

	dfs(r, 0);
	solve(r, 0);

	printf("%d\n", ans);
}

Compilation message

power.cpp: In function 'int main()':
power.cpp:71:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   71 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
power.cpp:76:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   76 |   scanf("%d %d", &u, &v);
      |   ~~~~~^~~~~~~~~~~~~~~~~
power.cpp:85:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   85 |   scanf(" %c", &c);
      |   ~~~~~^~~~~~~~~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 3 ms 4992 KB Output is correct
3 Correct 4 ms 4992 KB Output is correct
4 Correct 4 ms 4992 KB Output is correct
5 Correct 3 ms 4992 KB Output is correct
6 Correct 3 ms 4992 KB Output is correct
7 Correct 4 ms 5120 KB Output is correct
8 Correct 4 ms 4992 KB Output is correct
9 Correct 4 ms 4992 KB Output is correct
10 Correct 4 ms 4992 KB Output is correct
11 Correct 4 ms 4992 KB Output is correct
12 Correct 3 ms 4992 KB Output is correct
13 Correct 3 ms 4992 KB Output is correct
14 Correct 4 ms 4992 KB Output is correct
15 Correct 4 ms 4992 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 4 ms 4992 KB Output is correct
18 Correct 3 ms 4992 KB Output is correct
19 Correct 3 ms 4992 KB Output is correct
20 Correct 3 ms 4992 KB Output is correct
21 Correct 4 ms 5120 KB Output is correct

Subtask #2
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 3 ms 4992 KB Output is correct
3 Correct 4 ms 4992 KB Output is correct
4 Correct 4 ms 4992 KB Output is correct
5 Correct 3 ms 4992 KB Output is correct
6 Correct 3 ms 4992 KB Output is correct
7 Correct 4 ms 5120 KB Output is correct
8 Correct 4 ms 4992 KB Output is correct
9 Correct 4 ms 4992 KB Output is correct
10 Correct 4 ms 4992 KB Output is correct
11 Correct 4 ms 4992 KB Output is correct
12 Correct 3 ms 4992 KB Output is correct
13 Correct 3 ms 4992 KB Output is correct
14 Correct 4 ms 4992 KB Output is correct
15 Correct 4 ms 4992 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 4 ms 4992 KB Output is correct
18 Correct 3 ms 4992 KB Output is correct
19 Correct 3 ms 4992 KB Output is correct
20 Correct 3 ms 4992 KB Output is correct
21 Correct 4 ms 5120 KB Output is correct
22 Correct 5 ms 5120 KB Output is correct
23 Correct 5 ms 5120 KB Output is correct
24 Correct 5 ms 5120 KB Output is correct
25 Correct 5 ms 5120 KB Output is correct
26 Correct 5 ms 5120 KB Output is correct
27 Correct 4 ms 5120 KB Output is correct
28 Correct 5 ms 5120 KB Output is correct
29 Correct 5 ms 5248 KB Output is correct
30 Correct 5 ms 5248 KB Output is correct
31 Correct 5 ms 5120 KB Output is correct
32 Correct 5 ms 5120 KB Output is correct
33 Correct 5 ms 5120 KB Output is correct
34 Correct 5 ms 5120 KB Output is correct
35 Correct 5 ms 5120 KB Output is correct
36 Correct 6 ms 5120 KB Output is correct
37 Correct 5 ms 5120 KB Output is correct
38 Correct 5 ms 5120 KB Output is correct
39 Correct 5 ms 5120 KB Output is correct
40 Correct 5 ms 5120 KB Output is correct
41 Correct 5 ms 5120 KB Output is correct
42 Correct 6 ms 5140 KB Output is correct
43 Correct 5 ms 5120 KB Output is correct
44 Correct 5 ms 5120 KB Output is correct
45 Correct 5 ms 5120 KB Output is correct
46 Correct 5 ms 5120 KB Output is correct
47 Correct 6 ms 5120 KB Output is correct
48 Correct 4 ms 5120 KB Output is correct
49 Correct 5 ms 5120 KB Output is correct
50 Correct 4 ms 5120 KB Output is correct
51 Correct 5 ms 5120 KB Output is correct
52 Correct 5 ms 5120 KB Output is correct
53 Correct 5 ms 5120 KB Output is correct
54 Correct 5 ms 5120 KB Output is correct
55 Correct 5 ms 5120 KB Output is correct
56 Correct 5 ms 5120 KB Output is correct
57 Correct 5 ms 5248 KB Output is correct
58 Correct 4 ms 5120 KB Output is correct
59 Correct 5 ms 5120 KB Output is correct
60 Correct 5 ms 5248 KB Output is correct
61 Correct 4 ms 5120 KB Output is correct
62 Correct 5 ms 5248 KB Output is correct
63 Correct 4 ms 5120 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 3 ms 4992 KB Output is correct
3 Correct 4 ms 4992 KB Output is correct
4 Correct 4 ms 4992 KB Output is correct
5 Correct 3 ms 4992 KB Output is correct
6 Correct 3 ms 4992 KB Output is correct
7 Correct 4 ms 5120 KB Output is correct
8 Correct 4 ms 4992 KB Output is correct
9 Correct 4 ms 4992 KB Output is correct
10 Correct 4 ms 4992 KB Output is correct
11 Correct 4 ms 4992 KB Output is correct
12 Correct 3 ms 4992 KB Output is correct
13 Correct 3 ms 4992 KB Output is correct
14 Correct 4 ms 4992 KB Output is correct
15 Correct 4 ms 4992 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 4 ms 4992 KB Output is correct
18 Correct 3 ms 4992 KB Output is correct
19 Correct 3 ms 4992 KB Output is correct
20 Correct 3 ms 4992 KB Output is correct
21 Correct 4 ms 5120 KB Output is correct
22 Correct 5 ms 5120 KB Output is correct
23 Correct 5 ms 5120 KB Output is correct
24 Correct 5 ms 5120 KB Output is correct
25 Correct 5 ms 5120 KB Output is correct
26 Correct 5 ms 5120 KB Output is correct
27 Correct 4 ms 5120 KB Output is correct
28 Correct 5 ms 5120 KB Output is correct
29 Correct 5 ms 5248 KB Output is correct
30 Correct 5 ms 5248 KB Output is correct
31 Correct 5 ms 5120 KB Output is correct
32 Correct 5 ms 5120 KB Output is correct
33 Correct 5 ms 5120 KB Output is correct
34 Correct 5 ms 5120 KB Output is correct
35 Correct 5 ms 5120 KB Output is correct
36 Correct 6 ms 5120 KB Output is correct
37 Correct 5 ms 5120 KB Output is correct
38 Correct 5 ms 5120 KB Output is correct
39 Correct 5 ms 5120 KB Output is correct
40 Correct 5 ms 5120 KB Output is correct
41 Correct 5 ms 5120 KB Output is correct
42 Correct 6 ms 5140 KB Output is correct
43 Correct 5 ms 5120 KB Output is correct
44 Correct 5 ms 5120 KB Output is correct
45 Correct 5 ms 5120 KB Output is correct
46 Correct 5 ms 5120 KB Output is correct
47 Correct 6 ms 5120 KB Output is correct
48 Correct 4 ms 5120 KB Output is correct
49 Correct 5 ms 5120 KB Output is correct
50 Correct 4 ms 5120 KB Output is correct
51 Correct 5 ms 5120 KB Output is correct
52 Correct 5 ms 5120 KB Output is correct
53 Correct 5 ms 5120 KB Output is correct
54 Correct 5 ms 5120 KB Output is correct
55 Correct 5 ms 5120 KB Output is correct
56 Correct 5 ms 5120 KB Output is correct
57 Correct 5 ms 5248 KB Output is correct
58 Correct 4 ms 5120 KB Output is correct
59 Correct 5 ms 5120 KB Output is correct
60 Correct 5 ms 5248 KB Output is correct
61 Correct 4 ms 5120 KB Output is correct
62 Correct 5 ms 5248 KB Output is correct
63 Correct 4 ms 5120 KB Output is correct
64 Correct 247 ms 13676 KB Output is correct
65 Correct 249 ms 13688 KB Output is correct
66 Correct 249 ms 13816 KB Output is correct
67 Correct 237 ms 13688 KB Output is correct
68 Correct 263 ms 13688 KB Output is correct
69 Correct 261 ms 13692 KB Output is correct
70 Correct 241 ms 13688 KB Output is correct
71 Correct 248 ms 13816 KB Output is correct
72 Correct 241 ms 12920 KB Output is correct
73 Correct 280 ms 27640 KB Output is correct
74 Correct 273 ms 25080 KB Output is correct
75 Correct 233 ms 13560 KB Output is correct
76 Correct 251 ms 13560 KB Output is correct
77 Correct 245 ms 13560 KB Output is correct
78 Correct 263 ms 13560 KB Output is correct
79 Correct 243 ms 13808 KB Output is correct
80 Correct 247 ms 13560 KB Output is correct
81 Correct 199 ms 14060 KB Output is correct
82 Correct 233 ms 13940 KB Output is correct
83 Correct 268 ms 18680 KB Output is correct
84 Correct 266 ms 18936 KB Output is correct
85 Correct 263 ms 20600 KB Output is correct
86 Correct 241 ms 14684 KB Output is correct
87 Correct 244 ms 15224 KB Output is correct
88 Correct 237 ms 14748 KB Output is correct
89 Correct 236 ms 15200 KB Output is correct
90 Correct 237 ms 14832 KB Output is correct
91 Correct 233 ms 15096 KB Output is correct
92 Correct 232 ms 15352 KB Output is correct
93 Correct 231 ms 20212 KB Output is correct
94 Correct 211 ms 17956 KB Output is correct
95 Correct 225 ms 19956 KB Output is correct
96 Correct 246 ms 17528 KB Output is correct
97 Correct 221 ms 14904 KB Output is correct
98 Correct 237 ms 14584 KB Output is correct
99 Correct 240 ms 14072 KB Output is correct
100 Correct 226 ms 17272 KB Output is correct
101 Correct 240 ms 15480 KB Output is correct
102 Correct 228 ms 14584 KB Output is correct
103 Correct 240 ms 14328 KB Output is correct
104 Correct 135 ms 13808 KB Output is correct
105 Correct 273 ms 28576 KB Output is correct
106 Correct 136 ms 14440 KB Output is correct
107 Correct 140 ms 14568 KB Output is correct
108 Correct 265 ms 28536 KB Output is correct
109 Correct 130 ms 13672 KB Output is correct
110 Correct 285 ms 28664 KB Output is correct
111 Correct 217 ms 13560 KB Output is correct