답안 #306764

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
306764	2020-09-26T08:52:51 Z	MrDomino	Power Plant (JOI20_power)	C++14	100 / 100	308 ms	29752 KB

power

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;

const int N = (int) 2e5 + 7;
int n;
vector<int> g[N];
int v[N];
int dp[N];
int sum[N];
int sol;

void dfs(int a, int p)
{
    for (auto &b : g[a])
    {
        if (b != p)
        {
            dfs(b, a);
        }
    }
    sum[a] = 0;
    for (auto &b : g[a])
    {
        if (b != p)
        {
            sum[a] += dp[b];
        }
    }
    dp[a] = max(sum[a] - v[a], v[a]);
}

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

void dfs_solve(int a, int p)
{
    sol = max(sol, dp[a]);
    for (auto &b : g[a])
    {
        if (b != p)
        {
            reroot(a, b);
            dfs_solve(b, a);
            reroot(b, a);
        }
    }
}

int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);

    cin >> n;
    for (int i = 1; i < n; i++)
    {
        int x, y;
        cin >> x >> y;
        g[x].push_back(y);
        g[y].push_back(x);
    }
    string s;
    cin >> s;
    for (int i = 1; i <= n; i++)
    {
        if (s[i - 1] == '1')
        {
            v[i] = 1;
            sol++;
        }
    }
    sol = min(sol, 2);
    dfs(1, -1);
    dfs_solve(1, -1);
    cout << sol << "\n";
}

Subtask #1
6.0 / 6.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	4992 KB	Output is correct
2	Correct	4 ms	4992 KB	Output is correct
3	Correct	4 ms	4992 KB	Output is correct
4	Correct	4 ms	4992 KB	Output is correct
5	Correct	4 ms	4992 KB	Output is correct
6	Correct	5 ms	4992 KB	Output is correct
7	Correct	4 ms	4992 KB	Output is correct
8	Correct	5 ms	4992 KB	Output is correct
9	Correct	4 ms	4992 KB	Output is correct
10	Correct	5 ms	4992 KB	Output is correct
11	Correct	4 ms	4992 KB	Output is correct
12	Correct	5 ms	4992 KB	Output is correct
13	Correct	4 ms	4992 KB	Output is correct
14	Correct	4 ms	4992 KB	Output is correct
15	Correct	4 ms	4992 KB	Output is correct
16	Correct	4 ms	4992 KB	Output is correct
17	Correct	4 ms	4992 KB	Output is correct
18	Correct	4 ms	4992 KB	Output is correct
19	Correct	4 ms	4992 KB	Output is correct
20	Correct	3 ms	4992 KB	Output is correct
21	Correct	4 ms	4992 KB	Output is correct

Subtask #2
41.0 / 41.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	4992 KB	Output is correct
2	Correct	4 ms	4992 KB	Output is correct
3	Correct	4 ms	4992 KB	Output is correct
4	Correct	4 ms	4992 KB	Output is correct
5	Correct	4 ms	4992 KB	Output is correct
6	Correct	5 ms	4992 KB	Output is correct
7	Correct	4 ms	4992 KB	Output is correct
8	Correct	5 ms	4992 KB	Output is correct
9	Correct	4 ms	4992 KB	Output is correct
10	Correct	5 ms	4992 KB	Output is correct
11	Correct	4 ms	4992 KB	Output is correct
12	Correct	5 ms	4992 KB	Output is correct
13	Correct	4 ms	4992 KB	Output is correct
14	Correct	4 ms	4992 KB	Output is correct
15	Correct	4 ms	4992 KB	Output is correct
16	Correct	4 ms	4992 KB	Output is correct
17	Correct	4 ms	4992 KB	Output is correct
18	Correct	4 ms	4992 KB	Output is correct
19	Correct	4 ms	4992 KB	Output is correct
20	Correct	3 ms	4992 KB	Output is correct
21	Correct	4 ms	4992 KB	Output is correct
22	Correct	5 ms	5120 KB	Output is correct
23	Correct	4 ms	5120 KB	Output is correct
24	Correct	5 ms	5120 KB	Output is correct
25	Correct	4 ms	5120 KB	Output is correct
26	Correct	5 ms	5120 KB	Output is correct
27	Correct	5 ms	5120 KB	Output is correct
28	Correct	5 ms	5120 KB	Output is correct
29	Correct	5 ms	5248 KB	Output is correct
30	Correct	5 ms	5248 KB	Output is correct
31	Correct	5 ms	5120 KB	Output is correct
32	Correct	5 ms	5120 KB	Output is correct
33	Correct	4 ms	5120 KB	Output is correct
34	Correct	5 ms	5120 KB	Output is correct
35	Correct	5 ms	5120 KB	Output is correct
36	Correct	4 ms	5120 KB	Output is correct
37	Correct	5 ms	5120 KB	Output is correct
38	Correct	4 ms	5120 KB	Output is correct
39	Correct	5 ms	5248 KB	Output is correct
40	Correct	4 ms	5120 KB	Output is correct
41	Correct	6 ms	5248 KB	Output is correct
42	Correct	5 ms	5120 KB	Output is correct
43	Correct	5 ms	5120 KB	Output is correct
44	Correct	4 ms	5120 KB	Output is correct
45	Correct	4 ms	5120 KB	Output is correct
46	Correct	4 ms	5120 KB	Output is correct
47	Correct	4 ms	5120 KB	Output is correct
48	Correct	5 ms	5248 KB	Output is correct
49	Correct	4 ms	5248 KB	Output is correct
50	Correct	5 ms	5120 KB	Output is correct
51	Correct	6 ms	5120 KB	Output is correct
52	Correct	4 ms	5120 KB	Output is correct
53	Correct	5 ms	5120 KB	Output is correct
54	Correct	5 ms	5120 KB	Output is correct
55	Correct	5 ms	5120 KB	Output is correct
56	Correct	4 ms	5120 KB	Output is correct
57	Correct	5 ms	5248 KB	Output is correct
58	Correct	6 ms	5120 KB	Output is correct
59	Correct	5 ms	5096 KB	Output is correct
60	Correct	5 ms	5248 KB	Output is correct
61	Correct	4 ms	5120 KB	Output is correct
62	Correct	5 ms	5248 KB	Output is correct
63	Correct	4 ms	5120 KB	Output is correct

Subtask #3
53.0 / 53.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	4992 KB	Output is correct
2	Correct	4 ms	4992 KB	Output is correct
3	Correct	4 ms	4992 KB	Output is correct
4	Correct	4 ms	4992 KB	Output is correct
5	Correct	4 ms	4992 KB	Output is correct
6	Correct	5 ms	4992 KB	Output is correct
7	Correct	4 ms	4992 KB	Output is correct
8	Correct	5 ms	4992 KB	Output is correct
9	Correct	4 ms	4992 KB	Output is correct
10	Correct	5 ms	4992 KB	Output is correct
11	Correct	4 ms	4992 KB	Output is correct
12	Correct	5 ms	4992 KB	Output is correct
13	Correct	4 ms	4992 KB	Output is correct
14	Correct	4 ms	4992 KB	Output is correct
15	Correct	4 ms	4992 KB	Output is correct
16	Correct	4 ms	4992 KB	Output is correct
17	Correct	4 ms	4992 KB	Output is correct
18	Correct	4 ms	4992 KB	Output is correct
19	Correct	4 ms	4992 KB	Output is correct
20	Correct	3 ms	4992 KB	Output is correct
21	Correct	4 ms	4992 KB	Output is correct
22	Correct	5 ms	5120 KB	Output is correct
23	Correct	4 ms	5120 KB	Output is correct
24	Correct	5 ms	5120 KB	Output is correct
25	Correct	4 ms	5120 KB	Output is correct
26	Correct	5 ms	5120 KB	Output is correct
27	Correct	5 ms	5120 KB	Output is correct
28	Correct	5 ms	5120 KB	Output is correct
29	Correct	5 ms	5248 KB	Output is correct
30	Correct	5 ms	5248 KB	Output is correct
31	Correct	5 ms	5120 KB	Output is correct
32	Correct	5 ms	5120 KB	Output is correct
33	Correct	4 ms	5120 KB	Output is correct
34	Correct	5 ms	5120 KB	Output is correct
35	Correct	5 ms	5120 KB	Output is correct
36	Correct	4 ms	5120 KB	Output is correct
37	Correct	5 ms	5120 KB	Output is correct
38	Correct	4 ms	5120 KB	Output is correct
39	Correct	5 ms	5248 KB	Output is correct
40	Correct	4 ms	5120 KB	Output is correct
41	Correct	6 ms	5248 KB	Output is correct
42	Correct	5 ms	5120 KB	Output is correct
43	Correct	5 ms	5120 KB	Output is correct
44	Correct	4 ms	5120 KB	Output is correct
45	Correct	4 ms	5120 KB	Output is correct
46	Correct	4 ms	5120 KB	Output is correct
47	Correct	4 ms	5120 KB	Output is correct
48	Correct	5 ms	5248 KB	Output is correct
49	Correct	4 ms	5248 KB	Output is correct
50	Correct	5 ms	5120 KB	Output is correct
51	Correct	6 ms	5120 KB	Output is correct
52	Correct	4 ms	5120 KB	Output is correct
53	Correct	5 ms	5120 KB	Output is correct
54	Correct	5 ms	5120 KB	Output is correct
55	Correct	5 ms	5120 KB	Output is correct
56	Correct	4 ms	5120 KB	Output is correct
57	Correct	5 ms	5248 KB	Output is correct
58	Correct	6 ms	5120 KB	Output is correct
59	Correct	5 ms	5096 KB	Output is correct
60	Correct	5 ms	5248 KB	Output is correct
61	Correct	4 ms	5120 KB	Output is correct
62	Correct	5 ms	5248 KB	Output is correct
63	Correct	4 ms	5120 KB	Output is correct
64	Correct	234 ms	14048 KB	Output is correct
65	Correct	229 ms	14136 KB	Output is correct
66	Correct	227 ms	14128 KB	Output is correct
67	Correct	229 ms	14136 KB	Output is correct
68	Correct	226 ms	14116 KB	Output is correct
69	Correct	228 ms	14132 KB	Output is correct
70	Correct	227 ms	14020 KB	Output is correct
71	Correct	232 ms	14048 KB	Output is correct
72	Correct	210 ms	13308 KB	Output is correct
73	Correct	278 ms	26680 KB	Output is correct
74	Correct	276 ms	26584 KB	Output is correct
75	Correct	217 ms	14008 KB	Output is correct
76	Correct	223 ms	14016 KB	Output is correct
77	Correct	235 ms	13948 KB	Output is correct
78	Correct	240 ms	14008 KB	Output is correct
79	Correct	239 ms	14016 KB	Output is correct
80	Correct	239 ms	14008 KB	Output is correct
81	Correct	182 ms	14452 KB	Output is correct
82	Correct	197 ms	16888 KB	Output is correct
83	Correct	242 ms	21948 KB	Output is correct
84	Correct	249 ms	24136 KB	Output is correct
85	Correct	243 ms	23748 KB	Output is correct
86	Correct	223 ms	18104 KB	Output is correct
87	Correct	215 ms	17588 KB	Output is correct
88	Correct	205 ms	18036 KB	Output is correct
89	Correct	208 ms	17992 KB	Output is correct
90	Correct	201 ms	17820 KB	Output is correct
91	Correct	204 ms	18076 KB	Output is correct
92	Correct	226 ms	18472 KB	Output is correct
93	Correct	225 ms	20800 KB	Output is correct
94	Correct	208 ms	22512 KB	Output is correct
95	Correct	203 ms	21308 KB	Output is correct
96	Correct	207 ms	19364 KB	Output is correct
97	Correct	205 ms	17812 KB	Output is correct
98	Correct	205 ms	17512 KB	Output is correct
99	Correct	210 ms	17076 KB	Output is correct
100	Correct	215 ms	20380 KB	Output is correct
101	Correct	229 ms	18280 KB	Output is correct
102	Correct	198 ms	17540 KB	Output is correct
103	Correct	222 ms	17368 KB	Output is correct
104	Correct	129 ms	17000 KB	Output is correct
105	Correct	267 ms	25524 KB	Output is correct
106	Correct	122 ms	17516 KB	Output is correct
107	Correct	117 ms	17508 KB	Output is correct
108	Correct	308 ms	29332 KB	Output is correct
109	Correct	145 ms	16876 KB	Output is correct
110	Correct	277 ms	29752 KB	Output is correct
111	Correct	205 ms	16712 KB	Output is correct

답안 #306764

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