답안 #295733

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
295733	2020-09-09T20:56:35 Z	ChrisT	Power Plant (JOI20_power)	C++17	100 / 100	208 ms	35064 KB

power

#include <bits/stdc++.h>
using namespace std;
const int MN = 2e5+5;
vector<int> adj[MN];
char power[MN]; int dp[MN][2];
void dfs (int cur, int p = -1) {
	int mx = 0, mx2 = 0;
	for (int i : adj[cur]) if (i != p) {
		dfs(i,cur);
		dp[cur][1] += dp[i][1]; mx = max(mx,dp[i][0]); mx2 = max(mx2,dp[i][1]);
	}
	if (power[cur] == '0') dp[cur][0] = max({dp[cur][1],mx,0}), dp[cur][1] = max(dp[cur][1],0);
	else dp[cur][0] = max({dp[cur][1]-1,mx,mx2+1,1}), dp[cur][1] = max({dp[cur][1],mx2,2})-1;
}
int main () {
	int n;
	scanf ("%d",&n);
	for (int i = 1; i < n; i++) {
		int a,b;
		scanf ("%d %d",&a,&b);
		adj[a].push_back(b); adj[b].push_back(a);
	}
	scanf ("%s",power+1);
	dfs(1);
	printf ("%d\n",max(dp[1][1],dp[1][0]));
	return 0;
}

Compilation message

power.cpp: In function 'int main()':
power.cpp:17:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   17 |  scanf ("%d",&n);
      |  ~~~~~~^~~~~~~~~
power.cpp:20:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   20 |   scanf ("%d %d",&a,&b);
      |   ~~~~~~^~~~~~~~~~~~~~~
power.cpp:23:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   23 |  scanf ("%s",power+1);
      |  ~~~~~~^~~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	4992 KB	Output is correct
2	Correct	3 ms	4992 KB	Output is correct
3	Correct	3 ms	4992 KB	Output is correct
4	Correct	3 ms	4992 KB	Output is correct
5	Correct	4 ms	4992 KB	Output is correct
6	Correct	3 ms	4992 KB	Output is correct
7	Correct	4 ms	4992 KB	Output is correct
8	Correct	3 ms	4992 KB	Output is correct
9	Correct	3 ms	4992 KB	Output is correct
10	Correct	3 ms	4992 KB	Output is correct
11	Correct	4 ms	4992 KB	Output is correct
12	Correct	3 ms	4992 KB	Output is correct
13	Correct	3 ms	4992 KB	Output is correct
14	Correct	3 ms	4992 KB	Output is correct
15	Correct	4 ms	5120 KB	Output is correct
16	Correct	3 ms	4992 KB	Output is correct
17	Correct	4 ms	4992 KB	Output is correct
18	Correct	3 ms	4992 KB	Output is correct
19	Correct	3 ms	4992 KB	Output is correct
20	Correct	4 ms	4992 KB	Output is correct
21	Correct	4 ms	5120 KB	Output is correct

Subtask #2
41.0 / 41.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	4992 KB	Output is correct
2	Correct	3 ms	4992 KB	Output is correct
3	Correct	3 ms	4992 KB	Output is correct
4	Correct	3 ms	4992 KB	Output is correct
5	Correct	4 ms	4992 KB	Output is correct
6	Correct	3 ms	4992 KB	Output is correct
7	Correct	4 ms	4992 KB	Output is correct
8	Correct	3 ms	4992 KB	Output is correct
9	Correct	3 ms	4992 KB	Output is correct
10	Correct	3 ms	4992 KB	Output is correct
11	Correct	4 ms	4992 KB	Output is correct
12	Correct	3 ms	4992 KB	Output is correct
13	Correct	3 ms	4992 KB	Output is correct
14	Correct	3 ms	4992 KB	Output is correct
15	Correct	4 ms	5120 KB	Output is correct
16	Correct	3 ms	4992 KB	Output is correct
17	Correct	4 ms	4992 KB	Output is correct
18	Correct	3 ms	4992 KB	Output is correct
19	Correct	3 ms	4992 KB	Output is correct
20	Correct	4 ms	4992 KB	Output is correct
21	Correct	4 ms	5120 KB	Output is correct
22	Correct	4 ms	5120 KB	Output is correct
23	Correct	4 ms	5120 KB	Output is correct
24	Correct	4 ms	5120 KB	Output is correct
25	Correct	4 ms	5120 KB	Output is correct
26	Correct	4 ms	5120 KB	Output is correct
27	Correct	4 ms	5120 KB	Output is correct
28	Correct	4 ms	5120 KB	Output is correct
29	Correct	5 ms	5248 KB	Output is correct
30	Correct	4 ms	5248 KB	Output is correct
31	Correct	4 ms	5120 KB	Output is correct
32	Correct	4 ms	5120 KB	Output is correct
33	Correct	4 ms	5120 KB	Output is correct
34	Correct	4 ms	5120 KB	Output is correct
35	Correct	4 ms	5120 KB	Output is correct
36	Correct	4 ms	5120 KB	Output is correct
37	Correct	4 ms	5120 KB	Output is correct
38	Correct	4 ms	5120 KB	Output is correct
39	Correct	4 ms	5248 KB	Output is correct
40	Correct	4 ms	5120 KB	Output is correct
41	Correct	5 ms	5248 KB	Output is correct
42	Correct	4 ms	5120 KB	Output is correct
43	Correct	4 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	4 ms	5248 KB	Output is correct
49	Correct	5 ms	5248 KB	Output is correct
50	Correct	5 ms	5120 KB	Output is correct
51	Correct	4 ms	5120 KB	Output is correct
52	Correct	5 ms	5120 KB	Output is correct
53	Correct	4 ms	5120 KB	Output is correct
54	Correct	4 ms	5120 KB	Output is correct
55	Correct	4 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	4 ms	5120 KB	Output is correct
59	Correct	4 ms	5120 KB	Output is correct
60	Correct	4 ms	5248 KB	Output is correct
61	Correct	4 ms	5120 KB	Output is correct
62	Correct	4 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	3 ms	4992 KB	Output is correct
2	Correct	3 ms	4992 KB	Output is correct
3	Correct	3 ms	4992 KB	Output is correct
4	Correct	3 ms	4992 KB	Output is correct
5	Correct	4 ms	4992 KB	Output is correct
6	Correct	3 ms	4992 KB	Output is correct
7	Correct	4 ms	4992 KB	Output is correct
8	Correct	3 ms	4992 KB	Output is correct
9	Correct	3 ms	4992 KB	Output is correct
10	Correct	3 ms	4992 KB	Output is correct
11	Correct	4 ms	4992 KB	Output is correct
12	Correct	3 ms	4992 KB	Output is correct
13	Correct	3 ms	4992 KB	Output is correct
14	Correct	3 ms	4992 KB	Output is correct
15	Correct	4 ms	5120 KB	Output is correct
16	Correct	3 ms	4992 KB	Output is correct
17	Correct	4 ms	4992 KB	Output is correct
18	Correct	3 ms	4992 KB	Output is correct
19	Correct	3 ms	4992 KB	Output is correct
20	Correct	4 ms	4992 KB	Output is correct
21	Correct	4 ms	5120 KB	Output is correct
22	Correct	4 ms	5120 KB	Output is correct
23	Correct	4 ms	5120 KB	Output is correct
24	Correct	4 ms	5120 KB	Output is correct
25	Correct	4 ms	5120 KB	Output is correct
26	Correct	4 ms	5120 KB	Output is correct
27	Correct	4 ms	5120 KB	Output is correct
28	Correct	4 ms	5120 KB	Output is correct
29	Correct	5 ms	5248 KB	Output is correct
30	Correct	4 ms	5248 KB	Output is correct
31	Correct	4 ms	5120 KB	Output is correct
32	Correct	4 ms	5120 KB	Output is correct
33	Correct	4 ms	5120 KB	Output is correct
34	Correct	4 ms	5120 KB	Output is correct
35	Correct	4 ms	5120 KB	Output is correct
36	Correct	4 ms	5120 KB	Output is correct
37	Correct	4 ms	5120 KB	Output is correct
38	Correct	4 ms	5120 KB	Output is correct
39	Correct	4 ms	5248 KB	Output is correct
40	Correct	4 ms	5120 KB	Output is correct
41	Correct	5 ms	5248 KB	Output is correct
42	Correct	4 ms	5120 KB	Output is correct
43	Correct	4 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	4 ms	5248 KB	Output is correct
49	Correct	5 ms	5248 KB	Output is correct
50	Correct	5 ms	5120 KB	Output is correct
51	Correct	4 ms	5120 KB	Output is correct
52	Correct	5 ms	5120 KB	Output is correct
53	Correct	4 ms	5120 KB	Output is correct
54	Correct	4 ms	5120 KB	Output is correct
55	Correct	4 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	4 ms	5120 KB	Output is correct
59	Correct	4 ms	5120 KB	Output is correct
60	Correct	4 ms	5248 KB	Output is correct
61	Correct	4 ms	5120 KB	Output is correct
62	Correct	4 ms	5248 KB	Output is correct
63	Correct	4 ms	5120 KB	Output is correct
64	Correct	189 ms	15864 KB	Output is correct
65	Correct	197 ms	15864 KB	Output is correct
66	Correct	190 ms	15864 KB	Output is correct
67	Correct	182 ms	15864 KB	Output is correct
68	Correct	176 ms	15992 KB	Output is correct
69	Correct	180 ms	15992 KB	Output is correct
70	Correct	183 ms	15864 KB	Output is correct
71	Correct	170 ms	15864 KB	Output is correct
72	Correct	179 ms	16048 KB	Output is correct
73	Correct	195 ms	33528 KB	Output is correct
74	Correct	196 ms	33656 KB	Output is correct
75	Correct	180 ms	15736 KB	Output is correct
76	Correct	174 ms	15736 KB	Output is correct
77	Correct	180 ms	15736 KB	Output is correct
78	Correct	185 ms	15736 KB	Output is correct
79	Correct	185 ms	15736 KB	Output is correct
80	Correct	186 ms	15732 KB	Output is correct
81	Correct	148 ms	16052 KB	Output is correct
82	Correct	166 ms	15988 KB	Output is correct
83	Correct	192 ms	23120 KB	Output is correct
84	Correct	198 ms	25996 KB	Output is correct
85	Correct	190 ms	25592 KB	Output is correct
86	Correct	187 ms	17784 KB	Output is correct
87	Correct	185 ms	17020 KB	Output is correct
88	Correct	178 ms	17400 KB	Output is correct
89	Correct	181 ms	17528 KB	Output is correct
90	Correct	180 ms	17116 KB	Output is correct
91	Correct	177 ms	17400 KB	Output is correct
92	Correct	178 ms	17912 KB	Output is correct
93	Correct	174 ms	21364 KB	Output is correct
94	Correct	181 ms	23664 KB	Output is correct
95	Correct	167 ms	21876 KB	Output is correct
96	Correct	171 ms	19332 KB	Output is correct
97	Correct	164 ms	17180 KB	Output is correct
98	Correct	168 ms	16504 KB	Output is correct
99	Correct	185 ms	16248 KB	Output is correct
100	Correct	168 ms	20600 KB	Output is correct
101	Correct	170 ms	17784 KB	Output is correct
102	Correct	166 ms	16760 KB	Output is correct
103	Correct	177 ms	16508 KB	Output is correct
104	Correct	119 ms	16608 KB	Output is correct
105	Correct	205 ms	29120 KB	Output is correct
106	Correct	108 ms	16488 KB	Output is correct
107	Correct	110 ms	16492 KB	Output is correct
108	Correct	204 ms	34684 KB	Output is correct
109	Correct	108 ms	16620 KB	Output is correct
110	Correct	208 ms	35064 KB	Output is correct
111	Correct	174 ms	15736 KB	Output is correct

답안 #295733

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