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Submission #1063456

# Submission time Handle Problem Language Result Execution time Memory
1063456 2024-08-17T18:49:34 Z ThylOne Power Plant (JOI20_power) C++14
100 / 100
 109 ms 32824 KB 
//####################
//PowerPlant
//####################
#include<bits/stdc++.h>

using namespace std;
const int maxiN = 2*1e5;
bool isPowerPlant[maxiN];
vector<int> links[maxiN];
int dp[2][maxiN];
int ans = 0;
int solve(bool ataken,int node,int dad=-1){
	if(dp[ataken][node]!=-1)return dp[ataken][node];
	if(ataken==0){
		int sum = 0;
		int bestsub = 0;
		for(int v:links[node])if(v!=dad){
			int x = solve(0,v,node);
			bestsub = max(bestsub,x);
			sum += x;
			ans = max(ans, isPowerPlant[node] + solve(1,v,node));
		}
		if(bestsub<1)bestsub=isPowerPlant[node];
		if(bestsub>1)bestsub-=isPowerPlant[node];
		ans = max(ans,max(sum-isPowerPlant[node],bestsub));
		return dp[ataken][node] = max(sum-isPowerPlant[node],bestsub);
	}else{
		int sum = 0;
		int bestsub = 0;
		for(int v:links[node])if(v!=dad){
			int x = solve(0,v,node);
			bestsub = max(bestsub,x);
			sum += x;
		}
		ans = max(ans, max(sum-isPowerPlant[node],bestsub));
		return dp[ataken][node] = max(sum-isPowerPlant[node],bestsub);
	}
	
}
signed main(){
	ios::sync_with_stdio(false);
	int n;cin>>n;
	for(int i = 1;i<n;i++){
		int a,b;cin>>a>>b;
		a--;
		b--;
		links[a].push_back(b);
		links[b].push_back(a);
	}
	fill(dp[0],dp[0]+n,-1);
	fill(dp[1],dp[1]+n,-1);
	string binary;cin>>binary;
	for(int i= 0;i<n;i++)isPowerPlant[i] = (binary[i]=='1');
	solve(0,0);
	cout<<ans<<endl;
	return 0;
};

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 2 ms 4956 KB Output is correct
6 Correct 2 ms 5168 KB Output is correct
7 Correct 2 ms 4964 KB Output is correct
8 Correct 2 ms 4956 KB Output is correct
9 Correct 2 ms 4960 KB Output is correct
10 Correct 2 ms 4956 KB Output is correct
11 Correct 2 ms 4956 KB Output is correct
12 Correct 2 ms 4956 KB Output is correct
13 Correct 2 ms 4956 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 2 ms 4956 KB Output is correct
16 Correct 2 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 3 ms 4956 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 2 ms 4956 KB Output is correct
21 Correct 2 ms 4956 KB Output is correct

Subtask #2
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 2 ms 4956 KB Output is correct
6 Correct 2 ms 5168 KB Output is correct
7 Correct 2 ms 4964 KB Output is correct
8 Correct 2 ms 4956 KB Output is correct
9 Correct 2 ms 4960 KB Output is correct
10 Correct 2 ms 4956 KB Output is correct
11 Correct 2 ms 4956 KB Output is correct
12 Correct 2 ms 4956 KB Output is correct
13 Correct 2 ms 4956 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 2 ms 4956 KB Output is correct
16 Correct 2 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 3 ms 4956 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 2 ms 4956 KB Output is correct
21 Correct 2 ms 4956 KB Output is correct
22 Correct 3 ms 5212 KB Output is correct
23 Correct 3 ms 5212 KB Output is correct
24 Correct 2 ms 5212 KB Output is correct
25 Correct 2 ms 5252 KB Output is correct
26 Correct 2 ms 5184 KB Output is correct
27 Correct 3 ms 5212 KB Output is correct
28 Correct 3 ms 5172 KB Output is correct
29 Correct 3 ms 5212 KB Output is correct
30 Correct 3 ms 5212 KB Output is correct
31 Correct 2 ms 5208 KB Output is correct
32 Correct 2 ms 5248 KB Output is correct
33 Correct 3 ms 5176 KB Output is correct
34 Correct 3 ms 5212 KB Output is correct
35 Correct 3 ms 5212 KB Output is correct
36 Correct 4 ms 5212 KB Output is correct
37 Correct 2 ms 5212 KB Output is correct
38 Correct 2 ms 5212 KB Output is correct
39 Correct 3 ms 5212 KB Output is correct
40 Correct 3 ms 5148 KB Output is correct
41 Correct 3 ms 5212 KB Output is correct
42 Correct 2 ms 5212 KB Output is correct
43 Correct 3 ms 5212 KB Output is correct
44 Correct 3 ms 5212 KB Output is correct
45 Correct 3 ms 5212 KB Output is correct
46 Correct 4 ms 5212 KB Output is correct
47 Correct 4 ms 5308 KB Output is correct
48 Correct 3 ms 5212 KB Output is correct
49 Correct 2 ms 5208 KB Output is correct
50 Correct 2 ms 5212 KB Output is correct
51 Correct 3 ms 5212 KB Output is correct
52 Correct 3 ms 5212 KB Output is correct
53 Correct 3 ms 5124 KB Output is correct
54 Correct 2 ms 5212 KB Output is correct
55 Correct 3 ms 5212 KB Output is correct
56 Correct 2 ms 5264 KB Output is correct
57 Correct 3 ms 5212 KB Output is correct
58 Correct 2 ms 5212 KB Output is correct
59 Correct 3 ms 5212 KB Output is correct
60 Correct 3 ms 5252 KB Output is correct
61 Correct 3 ms 5212 KB Output is correct
62 Correct 3 ms 5212 KB Output is correct
63 Correct 3 ms 5180 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 2 ms 4956 KB Output is correct
6 Correct 2 ms 5168 KB Output is correct
7 Correct 2 ms 4964 KB Output is correct
8 Correct 2 ms 4956 KB Output is correct
9 Correct 2 ms 4960 KB Output is correct
10 Correct 2 ms 4956 KB Output is correct
11 Correct 2 ms 4956 KB Output is correct
12 Correct 2 ms 4956 KB Output is correct
13 Correct 2 ms 4956 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 2 ms 4956 KB Output is correct
16 Correct 2 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 3 ms 4956 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 2 ms 4956 KB Output is correct
21 Correct 2 ms 4956 KB Output is correct
22 Correct 3 ms 5212 KB Output is correct
23 Correct 3 ms 5212 KB Output is correct
24 Correct 2 ms 5212 KB Output is correct
25 Correct 2 ms 5252 KB Output is correct
26 Correct 2 ms 5184 KB Output is correct
27 Correct 3 ms 5212 KB Output is correct
28 Correct 3 ms 5172 KB Output is correct
29 Correct 3 ms 5212 KB Output is correct
30 Correct 3 ms 5212 KB Output is correct
31 Correct 2 ms 5208 KB Output is correct
32 Correct 2 ms 5248 KB Output is correct
33 Correct 3 ms 5176 KB Output is correct
34 Correct 3 ms 5212 KB Output is correct
35 Correct 3 ms 5212 KB Output is correct
36 Correct 4 ms 5212 KB Output is correct
37 Correct 2 ms 5212 KB Output is correct
38 Correct 2 ms 5212 KB Output is correct
39 Correct 3 ms 5212 KB Output is correct
40 Correct 3 ms 5148 KB Output is correct
41 Correct 3 ms 5212 KB Output is correct
42 Correct 2 ms 5212 KB Output is correct
43 Correct 3 ms 5212 KB Output is correct
44 Correct 3 ms 5212 KB Output is correct
45 Correct 3 ms 5212 KB Output is correct
46 Correct 4 ms 5212 KB Output is correct
47 Correct 4 ms 5308 KB Output is correct
48 Correct 3 ms 5212 KB Output is correct
49 Correct 2 ms 5208 KB Output is correct
50 Correct 2 ms 5212 KB Output is correct
51 Correct 3 ms 5212 KB Output is correct
52 Correct 3 ms 5212 KB Output is correct
53 Correct 3 ms 5124 KB Output is correct
54 Correct 2 ms 5212 KB Output is correct
55 Correct 3 ms 5212 KB Output is correct
56 Correct 2 ms 5264 KB Output is correct
57 Correct 3 ms 5212 KB Output is correct
58 Correct 2 ms 5212 KB Output is correct
59 Correct 3 ms 5212 KB Output is correct
60 Correct 3 ms 5252 KB Output is correct
61 Correct 3 ms 5212 KB Output is correct
62 Correct 3 ms 5212 KB Output is correct
63 Correct 3 ms 5180 KB Output is correct
64 Correct 75 ms 16332 KB Output is correct
65 Correct 61 ms 16272 KB Output is correct
66 Correct 73 ms 16132 KB Output is correct
67 Correct 64 ms 16276 KB Output is correct
68 Correct 64 ms 16252 KB Output is correct
69 Correct 62 ms 16312 KB Output is correct
70 Correct 59 ms 16192 KB Output is correct
71 Correct 69 ms 16288 KB Output is correct
72 Correct 62 ms 16272 KB Output is correct
73 Correct 76 ms 31376 KB Output is correct
74 Correct 81 ms 31332 KB Output is correct
75 Correct 59 ms 16024 KB Output is correct
76 Correct 75 ms 16028 KB Output is correct
77 Correct 64 ms 16044 KB Output is correct
78 Correct 60 ms 16016 KB Output is correct
79 Correct 59 ms 16024 KB Output is correct
80 Correct 60 ms 16020 KB Output is correct
81 Correct 52 ms 16556 KB Output is correct
82 Correct 57 ms 16212 KB Output is correct
83 Correct 67 ms 22232 KB Output is correct
84 Correct 68 ms 24996 KB Output is correct
85 Correct 69 ms 24472 KB Output is correct
86 Correct 61 ms 17944 KB Output is correct
87 Correct 59 ms 17168 KB Output is correct
88 Correct 59 ms 17616 KB Output is correct
89 Correct 64 ms 17568 KB Output is correct
90 Correct 69 ms 17364 KB Output is correct
91 Correct 63 ms 17516 KB Output is correct
92 Correct 70 ms 18104 KB Output is correct
93 Correct 77 ms 20836 KB Output is correct
94 Correct 58 ms 22980 KB Output is correct
95 Correct 60 ms 21324 KB Output is correct
96 Correct 61 ms 19376 KB Output is correct
97 Correct 64 ms 17476 KB Output is correct
98 Correct 58 ms 16836 KB Output is correct
99 Correct 58 ms 16580 KB Output is correct
100 Correct 71 ms 20352 KB Output is correct
101 Correct 62 ms 17936 KB Output is correct
102 Correct 60 ms 16992 KB Output is correct
103 Correct 61 ms 16672 KB Output is correct
104 Correct 43 ms 17088 KB Output is correct
105 Correct 67 ms 27648 KB Output is correct
106 Correct 46 ms 17068 KB Output is correct
107 Correct 42 ms 16836 KB Output is correct
108 Correct 109 ms 32196 KB Output is correct
109 Correct 58 ms 17096 KB Output is correct
110 Correct 74 ms 32824 KB Output is correct
111 Correct 55 ms 16032 KB Output is correct