답안 #394378

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
394378	2021-04-26T12:59:46 Z	parsabahrami	Power Plant (JOI20_power)	C++17	100 / 100	254 ms	24504 KB

power

/* There's someone in my head but it's not me */ 
#include <bits/stdc++.h>
 
using namespace std;

typedef long long int ll;
typedef pair<int, int> pii;
 
#define SZ(x)                       (int) x.size()
#define F                           first
#define S                           second

const int N = 2e5 + 10, MOD = 1e9 + 7;
int dp[N], pd[N], M[N], n, rt; vector<int> adj[N];
int ret = 0;

void DFS(int v, int p = -1) {
    for (int u : adj[v]) 
        if (u != p) DFS(u, v);
    int sum = 0;
    for (int u : adj[v]) 
        if (u != p) sum += dp[u];
    for (int u : adj[v])
        if (u != p) 
            dp[v] = max(dp[v], dp[u] - M[v]);
    dp[v] = max(dp[v], sum - M[v]);
    dp[v] = max(dp[v], M[v]); 
    if (~p) ret = max(ret, dp[v] + M[p]);
}

int main() {
    scanf("%d", &n);
    for (int i = 1; i < n; i++) {
        int u, v; scanf("%d%d", &u, &v);
        adj[u].push_back(v);
        adj[v].push_back(u);
    }
    scanf("\n");
    for (int i = 1; i <= n; i++) {
        char c; scanf("%c", &c);
        if (c - '0') M[i] = 1, rt = i;
    }
    DFS(rt);
    printf("%d\n", max(ret, dp[rt]));
    return 0;
}

Compilation message

power.cpp: In function 'int main()':
power.cpp:32:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   32 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
power.cpp:34:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   34 |         int u, v; scanf("%d%d", &u, &v);
      |                   ~~~~~^~~~~~~~~~~~~~~~
power.cpp:38:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   38 |     scanf("\n");
      |     ~~~~~^~~~~~
power.cpp:40:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   40 |         char c; scanf("%c", &c);
      |                 ~~~~~^~~~~~~~~~

Subtask #1
6.0 / 6.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	4940 KB	Output is correct
2	Correct	3 ms	4940 KB	Output is correct
3	Correct	3 ms	4940 KB	Output is correct
4	Correct	3 ms	4940 KB	Output is correct
5	Correct	3 ms	4944 KB	Output is correct
6	Correct	3 ms	4940 KB	Output is correct
7	Correct	3 ms	4940 KB	Output is correct
8	Correct	4 ms	4924 KB	Output is correct
9	Correct	3 ms	4940 KB	Output is correct
10	Correct	3 ms	4940 KB	Output is correct
11	Correct	3 ms	4940 KB	Output is correct
12	Correct	4 ms	5004 KB	Output is correct
13	Correct	3 ms	4940 KB	Output is correct
14	Correct	4 ms	4940 KB	Output is correct
15	Correct	3 ms	4940 KB	Output is correct
16	Correct	3 ms	4940 KB	Output is correct
17	Correct	3 ms	4940 KB	Output is correct
18	Correct	3 ms	4940 KB	Output is correct
19	Correct	3 ms	4940 KB	Output is correct
20	Correct	3 ms	4940 KB	Output is correct
21	Correct	3 ms	4940 KB	Output is correct

Subtask #2
41.0 / 41.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	4940 KB	Output is correct
2	Correct	3 ms	4940 KB	Output is correct
3	Correct	3 ms	4940 KB	Output is correct
4	Correct	3 ms	4940 KB	Output is correct
5	Correct	3 ms	4944 KB	Output is correct
6	Correct	3 ms	4940 KB	Output is correct
7	Correct	3 ms	4940 KB	Output is correct
8	Correct	4 ms	4924 KB	Output is correct
9	Correct	3 ms	4940 KB	Output is correct
10	Correct	3 ms	4940 KB	Output is correct
11	Correct	3 ms	4940 KB	Output is correct
12	Correct	4 ms	5004 KB	Output is correct
13	Correct	3 ms	4940 KB	Output is correct
14	Correct	4 ms	4940 KB	Output is correct
15	Correct	3 ms	4940 KB	Output is correct
16	Correct	3 ms	4940 KB	Output is correct
17	Correct	3 ms	4940 KB	Output is correct
18	Correct	3 ms	4940 KB	Output is correct
19	Correct	3 ms	4940 KB	Output is correct
20	Correct	3 ms	4940 KB	Output is correct
21	Correct	3 ms	4940 KB	Output is correct
22	Correct	4 ms	5068 KB	Output is correct
23	Correct	4 ms	5016 KB	Output is correct
24	Correct	4 ms	5068 KB	Output is correct
25	Correct	5 ms	5084 KB	Output is correct
26	Correct	4 ms	5068 KB	Output is correct
27	Correct	4 ms	5068 KB	Output is correct
28	Correct	5 ms	5072 KB	Output is correct
29	Correct	5 ms	5068 KB	Output is correct
30	Correct	4 ms	5068 KB	Output is correct
31	Correct	4 ms	5068 KB	Output is correct
32	Correct	4 ms	5068 KB	Output is correct
33	Correct	6 ms	5068 KB	Output is correct
34	Correct	4 ms	5068 KB	Output is correct
35	Correct	4 ms	5068 KB	Output is correct
36	Correct	5 ms	5068 KB	Output is correct
37	Correct	4 ms	5068 KB	Output is correct
38	Correct	5 ms	5052 KB	Output is correct
39	Correct	4 ms	5068 KB	Output is correct
40	Correct	4 ms	5068 KB	Output is correct
41	Correct	4 ms	5068 KB	Output is correct
42	Correct	5 ms	5068 KB	Output is correct
43	Correct	5 ms	5068 KB	Output is correct
44	Correct	5 ms	5068 KB	Output is correct
45	Correct	5 ms	5068 KB	Output is correct
46	Correct	5 ms	5068 KB	Output is correct
47	Correct	6 ms	5052 KB	Output is correct
48	Correct	4 ms	5068 KB	Output is correct
49	Correct	4 ms	5128 KB	Output is correct
50	Correct	4 ms	5068 KB	Output is correct
51	Correct	4 ms	5068 KB	Output is correct
52	Correct	4 ms	5072 KB	Output is correct
53	Correct	4 ms	5064 KB	Output is correct
54	Correct	4 ms	5068 KB	Output is correct
55	Correct	4 ms	5072 KB	Output is correct
56	Correct	4 ms	5088 KB	Output is correct
57	Correct	5 ms	5196 KB	Output is correct
58	Correct	4 ms	5068 KB	Output is correct
59	Correct	4 ms	5068 KB	Output is correct
60	Correct	6 ms	5196 KB	Output is correct
61	Correct	5 ms	5068 KB	Output is correct
62	Correct	4 ms	5100 KB	Output is correct
63	Correct	4 ms	5068 KB	Output is correct

Subtask #3
53.0 / 53.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	4940 KB	Output is correct
2	Correct	3 ms	4940 KB	Output is correct
3	Correct	3 ms	4940 KB	Output is correct
4	Correct	3 ms	4940 KB	Output is correct
5	Correct	3 ms	4944 KB	Output is correct
6	Correct	3 ms	4940 KB	Output is correct
7	Correct	3 ms	4940 KB	Output is correct
8	Correct	4 ms	4924 KB	Output is correct
9	Correct	3 ms	4940 KB	Output is correct
10	Correct	3 ms	4940 KB	Output is correct
11	Correct	3 ms	4940 KB	Output is correct
12	Correct	4 ms	5004 KB	Output is correct
13	Correct	3 ms	4940 KB	Output is correct
14	Correct	4 ms	4940 KB	Output is correct
15	Correct	3 ms	4940 KB	Output is correct
16	Correct	3 ms	4940 KB	Output is correct
17	Correct	3 ms	4940 KB	Output is correct
18	Correct	3 ms	4940 KB	Output is correct
19	Correct	3 ms	4940 KB	Output is correct
20	Correct	3 ms	4940 KB	Output is correct
21	Correct	3 ms	4940 KB	Output is correct
22	Correct	4 ms	5068 KB	Output is correct
23	Correct	4 ms	5016 KB	Output is correct
24	Correct	4 ms	5068 KB	Output is correct
25	Correct	5 ms	5084 KB	Output is correct
26	Correct	4 ms	5068 KB	Output is correct
27	Correct	4 ms	5068 KB	Output is correct
28	Correct	5 ms	5072 KB	Output is correct
29	Correct	5 ms	5068 KB	Output is correct
30	Correct	4 ms	5068 KB	Output is correct
31	Correct	4 ms	5068 KB	Output is correct
32	Correct	4 ms	5068 KB	Output is correct
33	Correct	6 ms	5068 KB	Output is correct
34	Correct	4 ms	5068 KB	Output is correct
35	Correct	4 ms	5068 KB	Output is correct
36	Correct	5 ms	5068 KB	Output is correct
37	Correct	4 ms	5068 KB	Output is correct
38	Correct	5 ms	5052 KB	Output is correct
39	Correct	4 ms	5068 KB	Output is correct
40	Correct	4 ms	5068 KB	Output is correct
41	Correct	4 ms	5068 KB	Output is correct
42	Correct	5 ms	5068 KB	Output is correct
43	Correct	5 ms	5068 KB	Output is correct
44	Correct	5 ms	5068 KB	Output is correct
45	Correct	5 ms	5068 KB	Output is correct
46	Correct	5 ms	5068 KB	Output is correct
47	Correct	6 ms	5052 KB	Output is correct
48	Correct	4 ms	5068 KB	Output is correct
49	Correct	4 ms	5128 KB	Output is correct
50	Correct	4 ms	5068 KB	Output is correct
51	Correct	4 ms	5068 KB	Output is correct
52	Correct	4 ms	5072 KB	Output is correct
53	Correct	4 ms	5064 KB	Output is correct
54	Correct	4 ms	5068 KB	Output is correct
55	Correct	4 ms	5072 KB	Output is correct
56	Correct	4 ms	5088 KB	Output is correct
57	Correct	5 ms	5196 KB	Output is correct
58	Correct	4 ms	5068 KB	Output is correct
59	Correct	4 ms	5068 KB	Output is correct
60	Correct	6 ms	5196 KB	Output is correct
61	Correct	5 ms	5068 KB	Output is correct
62	Correct	4 ms	5100 KB	Output is correct
63	Correct	4 ms	5068 KB	Output is correct
64	Correct	161 ms	12920 KB	Output is correct
65	Correct	204 ms	12844 KB	Output is correct
66	Correct	168 ms	12872 KB	Output is correct
67	Correct	180 ms	12868 KB	Output is correct
68	Correct	196 ms	12908 KB	Output is correct
69	Correct	205 ms	12936 KB	Output is correct
70	Correct	171 ms	13032 KB	Output is correct
71	Correct	181 ms	12928 KB	Output is correct
72	Correct	151 ms	12128 KB	Output is correct
73	Correct	205 ms	23876 KB	Output is correct
74	Correct	202 ms	21888 KB	Output is correct
75	Correct	147 ms	12772 KB	Output is correct
76	Correct	159 ms	12796 KB	Output is correct
77	Correct	177 ms	12788 KB	Output is correct
78	Correct	180 ms	12880 KB	Output is correct
79	Correct	165 ms	12724 KB	Output is correct
80	Correct	198 ms	12868 KB	Output is correct
81	Correct	144 ms	13184 KB	Output is correct
82	Correct	225 ms	12936 KB	Output is correct
83	Correct	211 ms	16836 KB	Output is correct
84	Correct	199 ms	16964 KB	Output is correct
85	Correct	209 ms	18316 KB	Output is correct
86	Correct	245 ms	13712 KB	Output is correct
87	Correct	191 ms	14052 KB	Output is correct
88	Correct	207 ms	13884 KB	Output is correct
89	Correct	196 ms	14164 KB	Output is correct
90	Correct	226 ms	13872 KB	Output is correct
91	Correct	192 ms	14020 KB	Output is correct
92	Correct	198 ms	14296 KB	Output is correct
93	Correct	202 ms	17988 KB	Output is correct
94	Correct	194 ms	16312 KB	Output is correct
95	Correct	185 ms	17968 KB	Output is correct
96	Correct	192 ms	16044 KB	Output is correct
97	Correct	165 ms	13792 KB	Output is correct
98	Correct	192 ms	13472 KB	Output is correct
99	Correct	198 ms	13260 KB	Output is correct
100	Correct	208 ms	15824 KB	Output is correct
101	Correct	176 ms	14216 KB	Output is correct
102	Correct	202 ms	13672 KB	Output is correct
103	Correct	192 ms	13404 KB	Output is correct
104	Correct	131 ms	12908 KB	Output is correct
105	Correct	236 ms	24492 KB	Output is correct
106	Correct	129 ms	13588 KB	Output is correct
107	Correct	113 ms	13572 KB	Output is correct
108	Correct	254 ms	24504 KB	Output is correct
109	Correct	144 ms	12712 KB	Output is correct
110	Correct	224 ms	24480 KB	Output is correct
111	Correct	180 ms	12696 KB	Output is correct

답안 #394378

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