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Submission #365161

# Submission time Handle Problem Language Result Execution time Memory
365161 2021-02-11T04:03:51 Z ronnith Power Plant (JOI20_power) C++14
100 / 100
 212 ms 35700 KB 
#include <bits/stdc++.h>

using namespace std;
using ll = long long;

const int N = 200000;

int n;
ll dp[N][3];
string s;
vector<int> adj[N];

void dfs(int x, int pr) {

	dp[x][0] = INT_MIN;
	if(s[x] == '1') 
		dp[x][0] = 1;

	ll val1 = INT_MIN, val3 = 0;
	if(s[x] == '1') 
		val1 = 1;

	ll v2 = 0;

	for(auto e : adj[x]) if(e != pr) {
		dfs(e, x);
		if(dp[x][0] != INT_MIN)
			dp[x][0] = 1 + max(dp[x][0] - 1, dp[e][2]);
		v2 += max(0LL, dp[e][2]);
		val3 = max(val3, dp[e][1]);
	}

	dp[x][1] = val1;
	dp[x][1] = max(dp[x][1], val3);

	dp[x][2] = val1;
	dp[x][2] = max(dp[x][2], v2 - (s[x] == '1'));
	dp[x][2] = max(dp[x][2], 0LL);
}

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);

	cin >> n;
	for(int i = 0;i < n-1;i ++) {
		int x, y; cin >> x >> y;
		x --,y --;
		adj[x].push_back(y);
		adj[y].push_back(x);
	}
	cin >> s;

	dfs(0, -1);

	ll ans = 0;
	for(int i = 0;i < n;i ++) {
//		cerr << dp[i][0] << ' ' << dp[i][1] << ' ' << dp[i][2] << '\n';
		ans = max(ans, dp[i][0]);
		ans = max(ans, dp[i][1]);
		ans = max(ans, dp[i][2]);
	}

	cout << ans << '\n';

}

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 4 ms 5100 KB Output is correct
3 Correct 3 ms 5100 KB Output is correct
4 Correct 4 ms 5100 KB Output is correct
5 Correct 3 ms 5100 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 4 ms 5100 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 5100 KB Output is correct
14 Correct 4 ms 5100 KB Output is correct
15 Correct 4 ms 5100 KB Output is correct
16 Correct 5 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

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 4 ms 5100 KB Output is correct
3 Correct 3 ms 5100 KB Output is correct
4 Correct 4 ms 5100 KB Output is correct
5 Correct 3 ms 5100 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 4 ms 5100 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 5100 KB Output is correct
14 Correct 4 ms 5100 KB Output is correct
15 Correct 4 ms 5100 KB Output is correct
16 Correct 5 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 5228 KB Output is correct
23 Correct 5 ms 5228 KB Output is correct
24 Correct 4 ms 5228 KB Output is correct
25 Correct 5 ms 5228 KB Output is correct
26 Correct 4 ms 5228 KB Output is correct
27 Correct 4 ms 5228 KB Output is correct
28 Correct 4 ms 5228 KB Output is correct
29 Correct 4 ms 5356 KB Output is correct
30 Correct 5 ms 5228 KB Output is correct
31 Correct 4 ms 5228 KB Output is correct
32 Correct 4 ms 5228 KB Output is correct
33 Correct 4 ms 5228 KB Output is correct
34 Correct 5 ms 5228 KB Output is correct
35 Correct 5 ms 5228 KB Output is correct
36 Correct 5 ms 5228 KB Output is correct
37 Correct 6 ms 5504 KB Output is correct
38 Correct 4 ms 5228 KB Output is correct
39 Correct 4 ms 5228 KB Output is correct
40 Correct 4 ms 5228 KB Output is correct
41 Correct 4 ms 5228 KB Output is correct
42 Correct 6 ms 5228 KB Output is correct
43 Correct 5 ms 5228 KB Output is correct
44 Correct 4 ms 5228 KB Output is correct
45 Correct 4 ms 5228 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 5 ms 5356 KB Output is correct
52 Correct 4 ms 5228 KB Output is correct
53 Correct 4 ms 5228 KB Output is correct
54 Correct 5 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 4 ms 5228 KB Output is correct
59 Correct 4 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 5 ms 5356 KB Output is correct
63 Correct 4 ms 5228 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 4 ms 5100 KB Output is correct
3 Correct 3 ms 5100 KB Output is correct
4 Correct 4 ms 5100 KB Output is correct
5 Correct 3 ms 5100 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 4 ms 5100 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 5100 KB Output is correct
14 Correct 4 ms 5100 KB Output is correct
15 Correct 4 ms 5100 KB Output is correct
16 Correct 5 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 5228 KB Output is correct
23 Correct 5 ms 5228 KB Output is correct
24 Correct 4 ms 5228 KB Output is correct
25 Correct 5 ms 5228 KB Output is correct
26 Correct 4 ms 5228 KB Output is correct
27 Correct 4 ms 5228 KB Output is correct
28 Correct 4 ms 5228 KB Output is correct
29 Correct 4 ms 5356 KB Output is correct
30 Correct 5 ms 5228 KB Output is correct
31 Correct 4 ms 5228 KB Output is correct
32 Correct 4 ms 5228 KB Output is correct
33 Correct 4 ms 5228 KB Output is correct
34 Correct 5 ms 5228 KB Output is correct
35 Correct 5 ms 5228 KB Output is correct
36 Correct 5 ms 5228 KB Output is correct
37 Correct 6 ms 5504 KB Output is correct
38 Correct 4 ms 5228 KB Output is correct
39 Correct 4 ms 5228 KB Output is correct
40 Correct 4 ms 5228 KB Output is correct
41 Correct 4 ms 5228 KB Output is correct
42 Correct 6 ms 5228 KB Output is correct
43 Correct 5 ms 5228 KB Output is correct
44 Correct 4 ms 5228 KB Output is correct
45 Correct 4 ms 5228 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 5 ms 5356 KB Output is correct
52 Correct 4 ms 5228 KB Output is correct
53 Correct 4 ms 5228 KB Output is correct
54 Correct 5 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 4 ms 5228 KB Output is correct
59 Correct 4 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 5 ms 5356 KB Output is correct
63 Correct 4 ms 5228 KB Output is correct
64 Correct 162 ms 19164 KB Output is correct
65 Correct 166 ms 19116 KB Output is correct
66 Correct 163 ms 19224 KB Output is correct
67 Correct 177 ms 19116 KB Output is correct
68 Correct 187 ms 19096 KB Output is correct
69 Correct 168 ms 19184 KB Output is correct
70 Correct 167 ms 19132 KB Output is correct
71 Correct 168 ms 19128 KB Output is correct
72 Correct 168 ms 19240 KB Output is correct
73 Correct 212 ms 34348 KB Output is correct
74 Correct 201 ms 34348 KB Output is correct
75 Correct 186 ms 19112 KB Output is correct
76 Correct 186 ms 18992 KB Output is correct
77 Correct 192 ms 18984 KB Output is correct
78 Correct 173 ms 18984 KB Output is correct
79 Correct 186 ms 19120 KB Output is correct
80 Correct 169 ms 18984 KB Output is correct
81 Correct 152 ms 19428 KB Output is correct
82 Correct 152 ms 19328 KB Output is correct
83 Correct 179 ms 25264 KB Output is correct
84 Correct 189 ms 27832 KB Output is correct
85 Correct 192 ms 27576 KB Output is correct
86 Correct 186 ms 20908 KB Output is correct
87 Correct 184 ms 20008 KB Output is correct
88 Correct 157 ms 20456 KB Output is correct
89 Correct 166 ms 20536 KB Output is correct
90 Correct 163 ms 20236 KB Output is correct
91 Correct 160 ms 20496 KB Output is correct
92 Correct 156 ms 20888 KB Output is correct
93 Correct 169 ms 23932 KB Output is correct
94 Correct 176 ms 25956 KB Output is correct
95 Correct 143 ms 24292 KB Output is correct
96 Correct 154 ms 22260 KB Output is correct
97 Correct 157 ms 20484 KB Output is correct
98 Correct 147 ms 19792 KB Output is correct
99 Correct 162 ms 19496 KB Output is correct
100 Correct 171 ms 23396 KB Output is correct
101 Correct 157 ms 20904 KB Output is correct
102 Correct 140 ms 19964 KB Output is correct
103 Correct 158 ms 19760 KB Output is correct
104 Correct 124 ms 20064 KB Output is correct
105 Correct 187 ms 30508 KB Output is correct
106 Correct 120 ms 19936 KB Output is correct
107 Correct 130 ms 19924 KB Output is correct
108 Correct 201 ms 35244 KB Output is correct
109 Correct 113 ms 20152 KB Output is correct
110 Correct 203 ms 35700 KB Output is correct
111 Correct 167 ms 19000 KB Output is correct