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답안 #495751

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
495751 2021-12-20T04:13:10 Z daongocha Power Plant (JOI20_power) C++14
100 / 100
 233 ms 26628 KB 
#include <bits/stdc++.h>

#define ll long long

#define fileopen(a, b) freopen(((std::string)a + ".inp").c_str(), "r", stdin); freopen(((std::string)b + ".out").c_str(), "w", stdout);
#define fileopen1(a) freopen(((std::string)a + ".inp").c_str(), "r", stdin); freopen(((std::string)a + ".out").c_str(), "w", stdout);

using namespace std;

const int MAXN = 2e5 + 5;
int dp[MAXN];
vector<int> path[MAXN];
int a[MAXN];

int ans = 0;

void reroot(int u, int v) {
	dp[u] -= max(dp[v], a[v]);
	dp[v] += max(dp[u], a[u]);
	ans = max(ans, dp[u]);
	ans = max(ans, dp[v]);
}

void dfs(int u, int pre = 0) {
	dp[u] = -a[u];
	for (int v: path[u])
		if (v != pre) {
			dfs(v, u);
			dp[u] += max(dp[v], a[v]);
		}
}

void calc(int u, int pre = 0) {
	ans = max(ans, dp[u]);
	for (int v: path[u]) 
		if (v != pre) {
			reroot(u, v);
			calc(v, u);
			reroot(v, u);
		}
}

signed main() {
	#ifndef PICHU_LOCAL_DEF
		//fileopen1("LAH");
	#endif

	cin.tie(0)->sync_with_stdio(0);

	int n;
	cin >> n;

	for (int i = 1, u, v; i < n; i++) {
		cin >> u >> v;
		path[u].push_back(v);
		path[v].push_back(u);
	}

	int cnt = 0;
	for (int i = 1; i <= n; i++) {
		char c; cin >> c;
		a[i] = c - '0';
		cnt += a[i];
	}

	ans = min(cnt, 2);

	dfs(1); for (int i = 1; i <= n; i++) ans = max(ans, dp[i]);
	calc(1);

	cout << ans << '\n';
}

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 2 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 5 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 4 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 4 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 5000 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 2 ms 4940 KB Output is correct
21 Correct 3 ms 4940 KB Output is correct

Subtask #2
41.0 / 41.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 2 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 5 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 4 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 4 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 5000 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 2 ms 4940 KB Output is correct
21 Correct 3 ms 4940 KB Output is correct
22 Correct 3 ms 5068 KB Output is correct
23 Correct 4 ms 5068 KB Output is correct
24 Correct 4 ms 5068 KB Output is correct
25 Correct 5 ms 5068 KB Output is correct
26 Correct 3 ms 5068 KB Output is correct
27 Correct 4 ms 5068 KB Output is correct
28 Correct 3 ms 5068 KB Output is correct
29 Correct 5 ms 5224 KB Output is correct
30 Correct 3 ms 5068 KB Output is correct
31 Correct 3 ms 5068 KB Output is correct
32 Correct 3 ms 5068 KB Output is correct
33 Correct 3 ms 5068 KB Output is correct
34 Correct 4 ms 5068 KB Output is correct
35 Correct 3 ms 5068 KB Output is correct
36 Correct 3 ms 5068 KB Output is correct
37 Correct 3 ms 5068 KB Output is correct
38 Correct 3 ms 5076 KB Output is correct
39 Correct 3 ms 5068 KB Output is correct
40 Correct 4 ms 5068 KB Output is correct
41 Correct 3 ms 5068 KB Output is correct
42 Correct 5 ms 5068 KB Output is correct
43 Correct 4 ms 5068 KB Output is correct
44 Correct 3 ms 5068 KB Output is correct
45 Correct 3 ms 5068 KB Output is correct
46 Correct 4 ms 5068 KB Output is correct
47 Correct 3 ms 5068 KB Output is correct
48 Correct 3 ms 5068 KB Output is correct
49 Correct 3 ms 5068 KB Output is correct
50 Correct 3 ms 5068 KB Output is correct
51 Correct 3 ms 5068 KB Output is correct
52 Correct 3 ms 5068 KB Output is correct
53 Correct 3 ms 5144 KB Output is correct
54 Correct 3 ms 5068 KB Output is correct
55 Correct 3 ms 5056 KB Output is correct
56 Correct 3 ms 5068 KB Output is correct
57 Correct 5 ms 5116 KB Output is correct
58 Correct 5 ms 5068 KB Output is correct
59 Correct 4 ms 5068 KB Output is correct
60 Correct 6 ms 5068 KB Output is correct
61 Correct 3 ms 5068 KB Output is correct
62 Correct 3 ms 5196 KB Output is correct
63 Correct 3 ms 5068 KB Output is correct

Subtask #3
53.0 / 53.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 2 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 5 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 4 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 4 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 5000 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 2 ms 4940 KB Output is correct
21 Correct 3 ms 4940 KB Output is correct
22 Correct 3 ms 5068 KB Output is correct
23 Correct 4 ms 5068 KB Output is correct
24 Correct 4 ms 5068 KB Output is correct
25 Correct 5 ms 5068 KB Output is correct
26 Correct 3 ms 5068 KB Output is correct
27 Correct 4 ms 5068 KB Output is correct
28 Correct 3 ms 5068 KB Output is correct
29 Correct 5 ms 5224 KB Output is correct
30 Correct 3 ms 5068 KB Output is correct
31 Correct 3 ms 5068 KB Output is correct
32 Correct 3 ms 5068 KB Output is correct
33 Correct 3 ms 5068 KB Output is correct
34 Correct 4 ms 5068 KB Output is correct
35 Correct 3 ms 5068 KB Output is correct
36 Correct 3 ms 5068 KB Output is correct
37 Correct 3 ms 5068 KB Output is correct
38 Correct 3 ms 5076 KB Output is correct
39 Correct 3 ms 5068 KB Output is correct
40 Correct 4 ms 5068 KB Output is correct
41 Correct 3 ms 5068 KB Output is correct
42 Correct 5 ms 5068 KB Output is correct
43 Correct 4 ms 5068 KB Output is correct
44 Correct 3 ms 5068 KB Output is correct
45 Correct 3 ms 5068 KB Output is correct
46 Correct 4 ms 5068 KB Output is correct
47 Correct 3 ms 5068 KB Output is correct
48 Correct 3 ms 5068 KB Output is correct
49 Correct 3 ms 5068 KB Output is correct
50 Correct 3 ms 5068 KB Output is correct
51 Correct 3 ms 5068 KB Output is correct
52 Correct 3 ms 5068 KB Output is correct
53 Correct 3 ms 5144 KB Output is correct
54 Correct 3 ms 5068 KB Output is correct
55 Correct 3 ms 5056 KB Output is correct
56 Correct 3 ms 5068 KB Output is correct
57 Correct 5 ms 5116 KB Output is correct
58 Correct 5 ms 5068 KB Output is correct
59 Correct 4 ms 5068 KB Output is correct
60 Correct 6 ms 5068 KB Output is correct
61 Correct 3 ms 5068 KB Output is correct
62 Correct 3 ms 5196 KB Output is correct
63 Correct 3 ms 5068 KB Output is correct
64 Correct 155 ms 12924 KB Output is correct
65 Correct 185 ms 12920 KB Output is correct
66 Correct 177 ms 12868 KB Output is correct
67 Correct 172 ms 12868 KB Output is correct
68 Correct 180 ms 12868 KB Output is correct
69 Correct 189 ms 12908 KB Output is correct
70 Correct 181 ms 12820 KB Output is correct
71 Correct 171 ms 13048 KB Output is correct
72 Correct 169 ms 12932 KB Output is correct
73 Correct 166 ms 25468 KB Output is correct
74 Correct 222 ms 25440 KB Output is correct
75 Correct 168 ms 12812 KB Output is correct
76 Correct 132 ms 12836 KB Output is correct
77 Correct 142 ms 12824 KB Output is correct
78 Correct 160 ms 12896 KB Output is correct
79 Correct 199 ms 12920 KB Output is correct
80 Correct 160 ms 12816 KB Output is correct
81 Correct 110 ms 13108 KB Output is correct
82 Correct 167 ms 13012 KB Output is correct
83 Correct 192 ms 17936 KB Output is correct
84 Correct 158 ms 20116 KB Output is correct
85 Correct 196 ms 19780 KB Output is correct
86 Correct 165 ms 14176 KB Output is correct
87 Correct 137 ms 13676 KB Output is correct
88 Correct 171 ms 14148 KB Output is correct
89 Correct 149 ms 14140 KB Output is correct
90 Correct 169 ms 14008 KB Output is correct
91 Correct 175 ms 14128 KB Output is correct
92 Correct 181 ms 14504 KB Output is correct
93 Correct 164 ms 16956 KB Output is correct
94 Correct 153 ms 18636 KB Output is correct
95 Correct 150 ms 17264 KB Output is correct
96 Correct 146 ms 15412 KB Output is correct
97 Correct 215 ms 14104 KB Output is correct
98 Correct 124 ms 13380 KB Output is correct
99 Correct 161 ms 13276 KB Output is correct
100 Correct 199 ms 16396 KB Output is correct
101 Correct 159 ms 14560 KB Output is correct
102 Correct 159 ms 13692 KB Output is correct
103 Correct 175 ms 13492 KB Output is correct
104 Correct 89 ms 13568 KB Output is correct
105 Correct 185 ms 22356 KB Output is correct
106 Correct 84 ms 13532 KB Output is correct
107 Correct 81 ms 13596 KB Output is correct
108 Correct 214 ms 26300 KB Output is correct
109 Correct 99 ms 13580 KB Output is correct
110 Correct 233 ms 26628 KB Output is correct
111 Correct 151 ms 12804 KB Output is correct