답안 #394376

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
394376	2021-04-26T12:57:28 Z	AriaH	Power Plant (JOI20_power)	C++11	100 / 100	209 ms	27272 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]), ret = max(ret, dp[u] + M[v]);
    dp[v] = max(dp[v], sum - M[v]);
    dp[v] = max(dp[v], M[v]); 
    ret = max(ret, dp[v]);
    //printf("%d %d\n", v, dp[v]);
}
 
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", ret);
    return 0;
}

Compilation message

power.cpp: In function 'int main()':
power.cpp:33:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   33 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
power.cpp:35:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   35 |         int u, v; scanf("%d%d", &u, &v);
      |                   ~~~~~^~~~~~~~~~~~~~~~
power.cpp:39:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   39 |     scanf("\n");
      |     ~~~~~^~~~~~
power.cpp:41:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   41 |         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	4 ms	4940 KB	Output is correct
3	Correct	4 ms	4940 KB	Output is correct
4	Correct	4 ms	4940 KB	Output is correct
5	Correct	3 ms	5000 KB	Output is correct
6	Correct	3 ms	4940 KB	Output is correct
7	Correct	4 ms	4940 KB	Output is correct
8	Correct	3 ms	4940 KB	Output is correct
9	Correct	3 ms	5000 KB	Output is correct
10	Correct	3 ms	5008 KB	Output is correct
11	Correct	4 ms	5004 KB	Output is correct
12	Correct	4 ms	4940 KB	Output is correct
13	Correct	4 ms	4984 KB	Output is correct
14	Correct	3 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	5000 KB	Output is correct
18	Correct	3 ms	4940 KB	Output is correct
19	Correct	3 ms	5008 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	4 ms	4940 KB	Output is correct
3	Correct	4 ms	4940 KB	Output is correct
4	Correct	4 ms	4940 KB	Output is correct
5	Correct	3 ms	5000 KB	Output is correct
6	Correct	3 ms	4940 KB	Output is correct
7	Correct	4 ms	4940 KB	Output is correct
8	Correct	3 ms	4940 KB	Output is correct
9	Correct	3 ms	5000 KB	Output is correct
10	Correct	3 ms	5008 KB	Output is correct
11	Correct	4 ms	5004 KB	Output is correct
12	Correct	4 ms	4940 KB	Output is correct
13	Correct	4 ms	4984 KB	Output is correct
14	Correct	3 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	5000 KB	Output is correct
18	Correct	3 ms	4940 KB	Output is correct
19	Correct	3 ms	5008 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	5012 KB	Output is correct
23	Correct	4 ms	5068 KB	Output is correct
24	Correct	4 ms	5068 KB	Output is correct
25	Correct	5 ms	5068 KB	Output is correct
26	Correct	5 ms	5012 KB	Output is correct
27	Correct	4 ms	5068 KB	Output is correct
28	Correct	4 ms	5068 KB	Output is correct
29	Correct	4 ms	5216 KB	Output is correct
30	Correct	4 ms	5068 KB	Output is correct
31	Correct	4 ms	5024 KB	Output is correct
32	Correct	4 ms	5068 KB	Output is correct
33	Correct	4 ms	5068 KB	Output is correct
34	Correct	5 ms	5068 KB	Output is correct
35	Correct	4 ms	5068 KB	Output is correct
36	Correct	4 ms	5016 KB	Output is correct
37	Correct	5 ms	5012 KB	Output is correct
38	Correct	5 ms	5060 KB	Output is correct
39	Correct	5 ms	5120 KB	Output is correct
40	Correct	4 ms	5068 KB	Output is correct
41	Correct	5 ms	5068 KB	Output is correct
42	Correct	4 ms	5016 KB	Output is correct
43	Correct	4 ms	5068 KB	Output is correct
44	Correct	4 ms	5016 KB	Output is correct
45	Correct	5 ms	5088 KB	Output is correct
46	Correct	5 ms	5080 KB	Output is correct
47	Correct	4 ms	5068 KB	Output is correct
48	Correct	4 ms	5060 KB	Output is correct
49	Correct	4 ms	5068 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	5068 KB	Output is correct
53	Correct	5 ms	5068 KB	Output is correct
54	Correct	4 ms	5068 KB	Output is correct
55	Correct	5 ms	5068 KB	Output is correct
56	Correct	4 ms	5068 KB	Output is correct
57	Correct	4 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	4 ms	5196 KB	Output is correct
61	Correct	4 ms	5016 KB	Output is correct
62	Correct	5 ms	5196 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	4 ms	4940 KB	Output is correct
3	Correct	4 ms	4940 KB	Output is correct
4	Correct	4 ms	4940 KB	Output is correct
5	Correct	3 ms	5000 KB	Output is correct
6	Correct	3 ms	4940 KB	Output is correct
7	Correct	4 ms	4940 KB	Output is correct
8	Correct	3 ms	4940 KB	Output is correct
9	Correct	3 ms	5000 KB	Output is correct
10	Correct	3 ms	5008 KB	Output is correct
11	Correct	4 ms	5004 KB	Output is correct
12	Correct	4 ms	4940 KB	Output is correct
13	Correct	4 ms	4984 KB	Output is correct
14	Correct	3 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	5000 KB	Output is correct
18	Correct	3 ms	4940 KB	Output is correct
19	Correct	3 ms	5008 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	5012 KB	Output is correct
23	Correct	4 ms	5068 KB	Output is correct
24	Correct	4 ms	5068 KB	Output is correct
25	Correct	5 ms	5068 KB	Output is correct
26	Correct	5 ms	5012 KB	Output is correct
27	Correct	4 ms	5068 KB	Output is correct
28	Correct	4 ms	5068 KB	Output is correct
29	Correct	4 ms	5216 KB	Output is correct
30	Correct	4 ms	5068 KB	Output is correct
31	Correct	4 ms	5024 KB	Output is correct
32	Correct	4 ms	5068 KB	Output is correct
33	Correct	4 ms	5068 KB	Output is correct
34	Correct	5 ms	5068 KB	Output is correct
35	Correct	4 ms	5068 KB	Output is correct
36	Correct	4 ms	5016 KB	Output is correct
37	Correct	5 ms	5012 KB	Output is correct
38	Correct	5 ms	5060 KB	Output is correct
39	Correct	5 ms	5120 KB	Output is correct
40	Correct	4 ms	5068 KB	Output is correct
41	Correct	5 ms	5068 KB	Output is correct
42	Correct	4 ms	5016 KB	Output is correct
43	Correct	4 ms	5068 KB	Output is correct
44	Correct	4 ms	5016 KB	Output is correct
45	Correct	5 ms	5088 KB	Output is correct
46	Correct	5 ms	5080 KB	Output is correct
47	Correct	4 ms	5068 KB	Output is correct
48	Correct	4 ms	5060 KB	Output is correct
49	Correct	4 ms	5068 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	5068 KB	Output is correct
53	Correct	5 ms	5068 KB	Output is correct
54	Correct	4 ms	5068 KB	Output is correct
55	Correct	5 ms	5068 KB	Output is correct
56	Correct	4 ms	5068 KB	Output is correct
57	Correct	4 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	4 ms	5196 KB	Output is correct
61	Correct	4 ms	5016 KB	Output is correct
62	Correct	5 ms	5196 KB	Output is correct
63	Correct	4 ms	5068 KB	Output is correct
64	Correct	178 ms	15632 KB	Output is correct
65	Correct	172 ms	15600 KB	Output is correct
66	Correct	168 ms	15632 KB	Output is correct
67	Correct	177 ms	15632 KB	Output is correct
68	Correct	176 ms	15588 KB	Output is correct
69	Correct	167 ms	15628 KB	Output is correct
70	Correct	165 ms	15556 KB	Output is correct
71	Correct	195 ms	15632 KB	Output is correct
72	Correct	169 ms	14788 KB	Output is correct
73	Correct	188 ms	26636 KB	Output is correct
74	Correct	193 ms	24628 KB	Output is correct
75	Correct	165 ms	15424 KB	Output is correct
76	Correct	175 ms	15428 KB	Output is correct
77	Correct	172 ms	15440 KB	Output is correct
78	Correct	170 ms	15556 KB	Output is correct
79	Correct	209 ms	15524 KB	Output is correct
80	Correct	177 ms	15544 KB	Output is correct
81	Correct	142 ms	15964 KB	Output is correct
82	Correct	175 ms	15612 KB	Output is correct
83	Correct	173 ms	19532 KB	Output is correct
84	Correct	184 ms	19668 KB	Output is correct
85	Correct	186 ms	21064 KB	Output is correct
86	Correct	162 ms	16364 KB	Output is correct
87	Correct	170 ms	16704 KB	Output is correct
88	Correct	152 ms	16580 KB	Output is correct
89	Correct	157 ms	16840 KB	Output is correct
90	Correct	153 ms	16580 KB	Output is correct
91	Correct	159 ms	16760 KB	Output is correct
92	Correct	156 ms	16960 KB	Output is correct
93	Correct	156 ms	20620 KB	Output is correct
94	Correct	141 ms	18876 KB	Output is correct
95	Correct	141 ms	20652 KB	Output is correct
96	Correct	154 ms	18740 KB	Output is correct
97	Correct	144 ms	16552 KB	Output is correct
98	Correct	143 ms	16196 KB	Output is correct
99	Correct	151 ms	15940 KB	Output is correct
100	Correct	147 ms	18480 KB	Output is correct
101	Correct	150 ms	16964 KB	Output is correct
102	Correct	152 ms	16452 KB	Output is correct
103	Correct	153 ms	16240 KB	Output is correct
104	Correct	96 ms	15668 KB	Output is correct
105	Correct	175 ms	27244 KB	Output is correct
106	Correct	100 ms	16160 KB	Output is correct
107	Correct	97 ms	16224 KB	Output is correct
108	Correct	173 ms	27272 KB	Output is correct
109	Correct	101 ms	15540 KB	Output is correct
110	Correct	173 ms	27248 KB	Output is correct
111	Correct	147 ms	15428 KB	Output is correct

답안 #394376

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