답안 #365161

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
365161	2021-02-11T04:03:51 Z	ronnith	Power Plant (JOI20_power)	C++14	100 / 100	212 ms	35700 KB

power

#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

#	결과	실행 시간	메모리	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

#	결과	실행 시간	메모리	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

#	결과	실행 시간	메모리	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

답안 #365161

Compilation message

Subtask #1 6.0 / 6.0

Subtask #2 41.0 / 41.0

Subtask #3 53.0 / 53.0

Subtask #1
6.0 / 6.0

Subtask #2
41.0 / 41.0

Subtask #3
53.0 / 53.0