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답안 #626758

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
626758 2022-08-11T18:16:39 Z MatBad Power Plant (JOI20_power) C++14
100 / 100
 179 ms 30236 KB 
#include<bits/stdc++.h>
//#pragma GCC optimize ("O2,unroll-loops")
#pragma GCC optimize("no-stack-protector,fast-math")
using namespace std;
#define F first
#define S second
#define pb push_back
#define ppb pop_back
#define lb lower_bound
#define ub upper_bound
#define pc __builtin_popcount
#define cl __builtin_clz
#define FOR(i,a,b) for(int i=a;i<=b;i++)
#define FORR(i,a,b) for(int i=a;i>=b;i--)
#define debug(x) cerr<<#x<<" : &"<<x<<"&\n"
#define wall() cerr<<'\n'<<"-------------------------------\n"
typedef long long ll;
typedef long double ld;
typedef pair<int , int> pii;
typedef pair<bool , pii> piii;

const int
	MX=2e5+5,
	M=600,
	MOD = 1e9+7, 
	inf = 1e9+20, 
	//infl = 1e16,
	LOG = 18,
	A = 27,
	del = 10067;

int n, dp[MX][3];
bool mark[MX];
vector<int> adj[MX];

// 0: vasat valid, 1: marz=vasat invalid, 2: birun

void dfs(int u, int p=0){
	int cnt=0;
	dp[u][0] = -mark[u];
	dp[u][1] = -inf;
	for(int v:adj[u]) if(v!=p) {
		dfs(v, u);
		if(max(max((mark[v]?1:-inf), dp[v][0]), dp[v][1]-2*mark[v])>-inf){
			cnt++;
			dp[u][0]+=max(max((mark[v]?1:-inf), dp[v][0]), dp[v][1]-2*mark[v]);
		}
		dp[u][1] = max(dp[u][1], mark[u]+max(max((mark[v]?1:-inf), dp[v][0]), dp[v][1]-2*mark[v]));
		dp[u][2] = max(max(dp[u][2], dp[v][0]), max(dp[v][2], (mark[v]?dp[v][1]:-inf))); 
		dp[u][2] = max(dp[u][2], (int)mark[v]);
	}
	if(cnt<2) dp[u][0] = -inf;
}

int main(){
    ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
	cin>>n;
	FOR(i, 1, n-1){
		int u, v;
		cin>>u>>v;
		adj[u].pb(v);
		adj[v].pb(u);
	}
	FOR(i, 1, n){
		char c;
		cin>>c;
		mark[i] = c=='1';
	}
	dfs(1);
	int res=0;
	res = max(dp[1][0], res);
	res = max(dp[1][2], res);
	if(mark[1]) res = max(res, dp[1][1]);
	if(mark[1] and !res) res=1;
	cout<<res<<'\n';
}

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5024 KB Output is correct
2 Correct 4 ms 5024 KB Output is correct
3 Correct 3 ms 5028 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 5024 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 4 ms 4948 KB Output is correct
10 Correct 4 ms 4948 KB Output is correct
11 Correct 4 ms 5028 KB Output is correct
12 Correct 4 ms 4984 KB Output is correct
13 Correct 3 ms 5028 KB Output is correct
14 Correct 3 ms 5032 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 5020 KB Output is correct
20 Correct 3 ms 5028 KB Output is correct
21 Correct 3 ms 4948 KB Output is correct

Subtask #2
41.0 / 41.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5024 KB Output is correct
2 Correct 4 ms 5024 KB Output is correct
3 Correct 3 ms 5028 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 5024 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 4 ms 4948 KB Output is correct
10 Correct 4 ms 4948 KB Output is correct
11 Correct 4 ms 5028 KB Output is correct
12 Correct 4 ms 4984 KB Output is correct
13 Correct 3 ms 5028 KB Output is correct
14 Correct 3 ms 5032 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 5020 KB Output is correct
20 Correct 3 ms 5028 KB Output is correct
21 Correct 3 ms 4948 KB Output is correct
22 Correct 4 ms 5044 KB Output is correct
23 Correct 4 ms 5076 KB Output is correct
24 Correct 6 ms 5076 KB Output is correct
25 Correct 5 ms 5040 KB Output is correct
26 Correct 4 ms 5076 KB Output is correct
27 Correct 4 ms 5076 KB Output is correct
28 Correct 4 ms 5076 KB Output is correct
29 Correct 4 ms 5164 KB Output is correct
30 Correct 3 ms 5164 KB Output is correct
31 Correct 3 ms 5076 KB Output is correct
32 Correct 3 ms 5076 KB Output is correct
33 Correct 4 ms 5076 KB Output is correct
34 Correct 4 ms 5076 KB Output is correct
35 Correct 4 ms 5032 KB Output is correct
36 Correct 4 ms 5076 KB Output is correct
37 Correct 4 ms 5044 KB Output is correct
38 Correct 3 ms 5036 KB Output is correct
39 Correct 4 ms 5168 KB Output is correct
40 Correct 5 ms 5076 KB Output is correct
41 Correct 3 ms 5168 KB Output is correct
42 Correct 3 ms 5168 KB Output is correct
43 Correct 4 ms 5076 KB Output is correct
44 Correct 3 ms 5076 KB Output is correct
45 Correct 3 ms 5076 KB Output is correct
46 Correct 4 ms 5076 KB Output is correct
47 Correct 4 ms 5076 KB Output is correct
48 Correct 5 ms 5172 KB Output is correct
49 Correct 4 ms 5204 KB Output is correct
50 Correct 3 ms 5076 KB Output is correct
51 Correct 4 ms 5076 KB Output is correct
52 Correct 3 ms 5076 KB Output is correct
53 Correct 5 ms 5076 KB Output is correct
54 Correct 4 ms 5044 KB Output is correct
55 Correct 4 ms 5076 KB Output is correct
56 Correct 3 ms 5076 KB Output is correct
57 Correct 4 ms 5172 KB Output is correct
58 Correct 3 ms 5036 KB Output is correct
59 Correct 4 ms 5080 KB Output is correct
60 Correct 4 ms 5164 KB Output is correct
61 Correct 4 ms 5076 KB Output is correct
62 Correct 4 ms 5168 KB Output is correct
63 Correct 4 ms 5076 KB Output is correct

Subtask #3
53.0 / 53.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5024 KB Output is correct
2 Correct 4 ms 5024 KB Output is correct
3 Correct 3 ms 5028 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 5024 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 4 ms 4948 KB Output is correct
10 Correct 4 ms 4948 KB Output is correct
11 Correct 4 ms 5028 KB Output is correct
12 Correct 4 ms 4984 KB Output is correct
13 Correct 3 ms 5028 KB Output is correct
14 Correct 3 ms 5032 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 5020 KB Output is correct
20 Correct 3 ms 5028 KB Output is correct
21 Correct 3 ms 4948 KB Output is correct
22 Correct 4 ms 5044 KB Output is correct
23 Correct 4 ms 5076 KB Output is correct
24 Correct 6 ms 5076 KB Output is correct
25 Correct 5 ms 5040 KB Output is correct
26 Correct 4 ms 5076 KB Output is correct
27 Correct 4 ms 5076 KB Output is correct
28 Correct 4 ms 5076 KB Output is correct
29 Correct 4 ms 5164 KB Output is correct
30 Correct 3 ms 5164 KB Output is correct
31 Correct 3 ms 5076 KB Output is correct
32 Correct 3 ms 5076 KB Output is correct
33 Correct 4 ms 5076 KB Output is correct
34 Correct 4 ms 5076 KB Output is correct
35 Correct 4 ms 5032 KB Output is correct
36 Correct 4 ms 5076 KB Output is correct
37 Correct 4 ms 5044 KB Output is correct
38 Correct 3 ms 5036 KB Output is correct
39 Correct 4 ms 5168 KB Output is correct
40 Correct 5 ms 5076 KB Output is correct
41 Correct 3 ms 5168 KB Output is correct
42 Correct 3 ms 5168 KB Output is correct
43 Correct 4 ms 5076 KB Output is correct
44 Correct 3 ms 5076 KB Output is correct
45 Correct 3 ms 5076 KB Output is correct
46 Correct 4 ms 5076 KB Output is correct
47 Correct 4 ms 5076 KB Output is correct
48 Correct 5 ms 5172 KB Output is correct
49 Correct 4 ms 5204 KB Output is correct
50 Correct 3 ms 5076 KB Output is correct
51 Correct 4 ms 5076 KB Output is correct
52 Correct 3 ms 5076 KB Output is correct
53 Correct 5 ms 5076 KB Output is correct
54 Correct 4 ms 5044 KB Output is correct
55 Correct 4 ms 5076 KB Output is correct
56 Correct 3 ms 5076 KB Output is correct
57 Correct 4 ms 5172 KB Output is correct
58 Correct 3 ms 5036 KB Output is correct
59 Correct 4 ms 5080 KB Output is correct
60 Correct 4 ms 5164 KB Output is correct
61 Correct 4 ms 5076 KB Output is correct
62 Correct 4 ms 5168 KB Output is correct
63 Correct 4 ms 5076 KB Output is correct
64 Correct 133 ms 16632 KB Output is correct
65 Correct 133 ms 16520 KB Output is correct
66 Correct 158 ms 16564 KB Output is correct
67 Correct 137 ms 16708 KB Output is correct
68 Correct 143 ms 16588 KB Output is correct
69 Correct 141 ms 16592 KB Output is correct
70 Correct 179 ms 16632 KB Output is correct
71 Correct 135 ms 16612 KB Output is correct
72 Correct 135 ms 16596 KB Output is correct
73 Correct 153 ms 29212 KB Output is correct
74 Correct 163 ms 29196 KB Output is correct
75 Correct 131 ms 16524 KB Output is correct
76 Correct 143 ms 16524 KB Output is correct
77 Correct 130 ms 16504 KB Output is correct
78 Correct 172 ms 16460 KB Output is correct
79 Correct 134 ms 16428 KB Output is correct
80 Correct 133 ms 16424 KB Output is correct
81 Correct 131 ms 16848 KB Output is correct
82 Correct 143 ms 16688 KB Output is correct
83 Correct 148 ms 21672 KB Output is correct
84 Correct 141 ms 23808 KB Output is correct
85 Correct 165 ms 23556 KB Output is correct
86 Correct 155 ms 18020 KB Output is correct
87 Correct 128 ms 17336 KB Output is correct
88 Correct 120 ms 17964 KB Output is correct
89 Correct 130 ms 17868 KB Output is correct
90 Correct 121 ms 17596 KB Output is correct
91 Correct 149 ms 17884 KB Output is correct
92 Correct 121 ms 18324 KB Output is correct
93 Correct 131 ms 20512 KB Output is correct
94 Correct 117 ms 22180 KB Output is correct
95 Correct 119 ms 20988 KB Output is correct
96 Correct 137 ms 19236 KB Output is correct
97 Correct 120 ms 17684 KB Output is correct
98 Correct 120 ms 17196 KB Output is correct
99 Correct 118 ms 16968 KB Output is correct
100 Correct 147 ms 20120 KB Output is correct
101 Correct 124 ms 18148 KB Output is correct
102 Correct 130 ms 17376 KB Output is correct
103 Correct 143 ms 17200 KB Output is correct
104 Correct 77 ms 17324 KB Output is correct
105 Correct 144 ms 26052 KB Output is correct
106 Correct 77 ms 17220 KB Output is correct
107 Correct 77 ms 17172 KB Output is correct
108 Correct 158 ms 29988 KB Output is correct
109 Correct 97 ms 17356 KB Output is correct
110 Correct 141 ms 30236 KB Output is correct
111 Correct 116 ms 16472 KB Output is correct