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답안 #374951

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
374951 2021-03-08T16:23:32 Z S920105123 Power Plant (JOI20_power) C++14
100 / 100
 216 ms 38828 KB 
#include <bits/stdc++.h>
#define LL long long
#define PII pair<int, int>
#define PLL pair<LL, LL>
#define all_of(v) (v).begin(), (v).end()
#define sort_unique(c) (sort(c.begin(),c.end()), c.resize(distance(c.begin(),unique(c.begin(),c.end()))))
#define fi first
#define se second
const int MAXN = 200005;
const LL INF = (LL) 1e9 + 8763;
//const LL MOD = (LL) 1e9 + 7;
using namespace std;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int n, dp[MAXN][2], have[MAXN], ans = 0;
vector<int> G[MAXN];

void dfs(int v, int p) {
	dp[v][0] = dp[v][1] = 0;	
	int maxv = 0, sum = 0, ch = 0;
	for (int to : G[v]) {
		if (to == p) continue;
		dfs(to, v);
		maxv = max({maxv, dp[to][0], dp[to][1] - 2 * have[to], have[to]});
		sum += max({0, dp[to][0], dp[to][1] - 2 * have[to], have[to]});
		ch++;
	}
	if (ch == 0) {
		dp[v][0] = -have[v];
		dp[v][1] = have[v];
//		cout << "At " << v << " -> " << dp[v][0] << ' ' << dp[v][1] << '\n';
		ans = max(ans, dp[v][0]);
		ans = max(ans, dp[v][1]);
		return;
	}
	dp[v][0] = sum - have[v];
	dp[v][1] = maxv + have[v];
	ans = max(ans, dp[v][0]);
	ans = max(ans, dp[v][1]);
//	cout << "At " << v << " -> " << dp[v][0] << ' ' << dp[v][1] << '\n';
}

void solve() {
	cin >> n;
	for (int i = 0; i < n - 1; i++) {
		int u, v;
		cin >> u >> v;
		G[u].push_back(v);
		G[v].push_back(u);
	}
	string s;
	cin >> s;
	for (int i = 0; i < n; i++) {
		have[i + 1] = s[i] == '1';
	}
	dfs(1, 1);
	cout << ans << '\n';
}
 
int main() {
	ios_base::sync_with_stdio(0); cin.tie(0);

	int tc = 1;
//	cin >> tc;
	for (int i = 1; i <= tc; i++) {
		solve();
	}
 
	return 0;
}

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 4 ms 5100 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 4 ms 5100 KB Output is correct
5 Correct 4 ms 5100 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 4 ms 5248 KB Output is correct
8 Correct 4 ms 5100 KB Output is correct
9 Correct 4 ms 5100 KB Output is correct
10 Correct 4 ms 5100 KB Output is correct
11 Correct 4 ms 5100 KB Output is correct
12 Correct 4 ms 5100 KB Output is correct
13 Correct 4 ms 5120 KB Output is correct
14 Correct 4 ms 5120 KB Output is correct
15 Correct 4 ms 5100 KB Output is correct
16 Correct 4 ms 5100 KB Output is correct
17 Correct 4 ms 5100 KB Output is correct
18 Correct 4 ms 5100 KB Output is correct
19 Correct 4 ms 5100 KB Output is correct
20 Correct 4 ms 5100 KB Output is correct
21 Correct 4 ms 5100 KB Output is correct

Subtask #2
41.0 / 41.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 4 ms 5100 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 4 ms 5100 KB Output is correct
5 Correct 4 ms 5100 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 4 ms 5248 KB Output is correct
8 Correct 4 ms 5100 KB Output is correct
9 Correct 4 ms 5100 KB Output is correct
10 Correct 4 ms 5100 KB Output is correct
11 Correct 4 ms 5100 KB Output is correct
12 Correct 4 ms 5100 KB Output is correct
13 Correct 4 ms 5120 KB Output is correct
14 Correct 4 ms 5120 KB Output is correct
15 Correct 4 ms 5100 KB Output is correct
16 Correct 4 ms 5100 KB Output is correct
17 Correct 4 ms 5100 KB Output is correct
18 Correct 4 ms 5100 KB Output is correct
19 Correct 4 ms 5100 KB Output is correct
20 Correct 4 ms 5100 KB Output is correct
21 Correct 4 ms 5100 KB Output is correct
22 Correct 4 ms 5100 KB Output is correct
23 Correct 4 ms 5100 KB Output is correct
24 Correct 5 ms 5100 KB Output is correct
25 Correct 4 ms 5100 KB Output is correct
26 Correct 5 ms 5228 KB Output is correct
27 Correct 5 ms 5100 KB Output is correct
28 Correct 4 ms 5100 KB Output is correct
29 Correct 5 ms 5356 KB Output is correct
30 Correct 4 ms 5356 KB Output is correct
31 Correct 4 ms 5120 KB Output is correct
32 Correct 5 ms 5100 KB Output is correct
33 Correct 4 ms 5100 KB Output is correct
34 Correct 4 ms 5228 KB Output is correct
35 Correct 4 ms 5100 KB Output is correct
36 Correct 4 ms 5100 KB Output is correct
37 Correct 4 ms 5100 KB Output is correct
38 Correct 4 ms 5100 KB Output is correct
39 Correct 5 ms 5228 KB Output is correct
40 Correct 4 ms 5228 KB Output is correct
41 Correct 5 ms 5228 KB Output is correct
42 Correct 4 ms 5228 KB Output is correct
43 Correct 5 ms 5356 KB Output is correct
44 Correct 5 ms 5228 KB Output is correct
45 Correct 4 ms 5248 KB Output is correct
46 Correct 4 ms 5228 KB Output is correct
47 Correct 4 ms 5228 KB Output is correct
48 Correct 4 ms 5228 KB Output is correct
49 Correct 4 ms 5248 KB Output is correct
50 Correct 4 ms 5228 KB Output is correct
51 Correct 4 ms 5228 KB Output is correct
52 Correct 4 ms 5228 KB Output is correct
53 Correct 4 ms 5228 KB Output is correct
54 Correct 4 ms 5228 KB Output is correct
55 Correct 5 ms 5228 KB Output is correct
56 Correct 5 ms 5228 KB Output is correct
57 Correct 5 ms 5356 KB Output is correct
58 Correct 5 ms 5228 KB Output is correct
59 Correct 5 ms 5228 KB Output is correct
60 Correct 5 ms 5228 KB Output is correct
61 Correct 5 ms 5228 KB Output is correct
62 Correct 4 ms 5356 KB Output is correct
63 Correct 4 ms 5100 KB Output is correct

Subtask #3
53.0 / 53.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 4 ms 5100 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 4 ms 5100 KB Output is correct
5 Correct 4 ms 5100 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 4 ms 5248 KB Output is correct
8 Correct 4 ms 5100 KB Output is correct
9 Correct 4 ms 5100 KB Output is correct
10 Correct 4 ms 5100 KB Output is correct
11 Correct 4 ms 5100 KB Output is correct
12 Correct 4 ms 5100 KB Output is correct
13 Correct 4 ms 5120 KB Output is correct
14 Correct 4 ms 5120 KB Output is correct
15 Correct 4 ms 5100 KB Output is correct
16 Correct 4 ms 5100 KB Output is correct
17 Correct 4 ms 5100 KB Output is correct
18 Correct 4 ms 5100 KB Output is correct
19 Correct 4 ms 5100 KB Output is correct
20 Correct 4 ms 5100 KB Output is correct
21 Correct 4 ms 5100 KB Output is correct
22 Correct 4 ms 5100 KB Output is correct
23 Correct 4 ms 5100 KB Output is correct
24 Correct 5 ms 5100 KB Output is correct
25 Correct 4 ms 5100 KB Output is correct
26 Correct 5 ms 5228 KB Output is correct
27 Correct 5 ms 5100 KB Output is correct
28 Correct 4 ms 5100 KB Output is correct
29 Correct 5 ms 5356 KB Output is correct
30 Correct 4 ms 5356 KB Output is correct
31 Correct 4 ms 5120 KB Output is correct
32 Correct 5 ms 5100 KB Output is correct
33 Correct 4 ms 5100 KB Output is correct
34 Correct 4 ms 5228 KB Output is correct
35 Correct 4 ms 5100 KB Output is correct
36 Correct 4 ms 5100 KB Output is correct
37 Correct 4 ms 5100 KB Output is correct
38 Correct 4 ms 5100 KB Output is correct
39 Correct 5 ms 5228 KB Output is correct
40 Correct 4 ms 5228 KB Output is correct
41 Correct 5 ms 5228 KB Output is correct
42 Correct 4 ms 5228 KB Output is correct
43 Correct 5 ms 5356 KB Output is correct
44 Correct 5 ms 5228 KB Output is correct
45 Correct 4 ms 5248 KB Output is correct
46 Correct 4 ms 5228 KB Output is correct
47 Correct 4 ms 5228 KB Output is correct
48 Correct 4 ms 5228 KB Output is correct
49 Correct 4 ms 5248 KB Output is correct
50 Correct 4 ms 5228 KB Output is correct
51 Correct 4 ms 5228 KB Output is correct
52 Correct 4 ms 5228 KB Output is correct
53 Correct 4 ms 5228 KB Output is correct
54 Correct 4 ms 5228 KB Output is correct
55 Correct 5 ms 5228 KB Output is correct
56 Correct 5 ms 5228 KB Output is correct
57 Correct 5 ms 5356 KB Output is correct
58 Correct 5 ms 5228 KB Output is correct
59 Correct 5 ms 5228 KB Output is correct
60 Correct 5 ms 5228 KB Output is correct
61 Correct 5 ms 5228 KB Output is correct
62 Correct 4 ms 5356 KB Output is correct
63 Correct 4 ms 5100 KB Output is correct
64 Correct 183 ms 16848 KB Output is correct
65 Correct 166 ms 16812 KB Output is correct
66 Correct 185 ms 16920 KB Output is correct
67 Correct 185 ms 16812 KB Output is correct
68 Correct 166 ms 16920 KB Output is correct
69 Correct 170 ms 16884 KB Output is correct
70 Correct 174 ms 16828 KB Output is correct
71 Correct 172 ms 16824 KB Output is correct
72 Correct 168 ms 16808 KB Output is correct
73 Correct 216 ms 37164 KB Output is correct
74 Correct 203 ms 36908 KB Output is correct
75 Correct 188 ms 16680 KB Output is correct
76 Correct 175 ms 16688 KB Output is correct
77 Correct 179 ms 16680 KB Output is correct
78 Correct 190 ms 16808 KB Output is correct
79 Correct 188 ms 16688 KB Output is correct
80 Correct 178 ms 16680 KB Output is correct
81 Correct 143 ms 17124 KB Output is correct
82 Correct 162 ms 17004 KB Output is correct
83 Correct 175 ms 25136 KB Output is correct
84 Correct 168 ms 28472 KB Output is correct
85 Correct 167 ms 27960 KB Output is correct
86 Correct 157 ms 18988 KB Output is correct
87 Correct 163 ms 18120 KB Output is correct
88 Correct 178 ms 18408 KB Output is correct
89 Correct 178 ms 18488 KB Output is correct
90 Correct 171 ms 18316 KB Output is correct
91 Correct 163 ms 18448 KB Output is correct
92 Correct 168 ms 19224 KB Output is correct
93 Correct 181 ms 23036 KB Output is correct
94 Correct 151 ms 25828 KB Output is correct
95 Correct 159 ms 23652 KB Output is correct
96 Correct 161 ms 20760 KB Output is correct
97 Correct 170 ms 18308 KB Output is correct
98 Correct 158 ms 17372 KB Output is correct
99 Correct 172 ms 17192 KB Output is correct
100 Correct 160 ms 22296 KB Output is correct
101 Correct 167 ms 18984 KB Output is correct
102 Correct 162 ms 17788 KB Output is correct
103 Correct 183 ms 17484 KB Output is correct
104 Correct 101 ms 17632 KB Output is correct
105 Correct 183 ms 31916 KB Output is correct
106 Correct 109 ms 17504 KB Output is correct
107 Correct 108 ms 17632 KB Output is correct
108 Correct 204 ms 38316 KB Output is correct
109 Correct 115 ms 17632 KB Output is correct
110 Correct 184 ms 38828 KB Output is correct
111 Correct 161 ms 16696 KB Output is correct