답안 #636819

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
636819	2022-08-30T09:35:26 Z	valerikk	Power Plant (JOI20_power)	C++17	100 / 100	181 ms	32344 KB

power

#include <cstdio>
#include <vector>
#include <algorithm>

using namespace std;

const int MAX_N = 200005;

void umax(int &a, int b) {
	a = max(a, b);
}

int N;
vector<int> adj[MAX_N];
char S[MAX_N];
int D[MAX_N][2];

void DFS(int u, int p = -1) {
	int sum[2] = {0, 0};
	int mx[2] = {0, 0};
	for(int v : adj[u]) {
		if(v != p) {
			DFS(v, u);
			for(int i = 0; i < 2; ++i) {
				sum[i] += D[v][i];
				umax(mx[i], D[v][i]);
			}
		}
	}
	if(S[u] == '1') {
		umax(D[u][0], sum[1] - 1);
		umax(D[u][0], mx[0]);
		umax(D[u][0], mx[1] + 1);
		umax(D[u][0], 1);
		umax(D[u][1], sum[1] - 1);
		umax(D[u][1], 1);
	} else {
		umax(D[u][0], sum[1]);
		umax(D[u][0], mx[0]);
		umax(D[u][1], sum[1]);
	}
}

int main() {
	scanf("%d", &N);
	for(int i = 0; i < N - 1; ++i) {
		int A, B;
		scanf("%d%d", &A, &B);
		adj[A].push_back(B);
		adj[B].push_back(A);
	}
	scanf("%s", S + 1);
	DFS(1);
	printf("%d\n", D[1][0]);
}

Compilation message

power.cpp: In function 'int main()':
power.cpp:45:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |  scanf("%d", &N);
      |  ~~~~~^~~~~~~~~~
power.cpp:48:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |   scanf("%d%d", &A, &B);
      |   ~~~~~^~~~~~~~~~~~~~~~
power.cpp:52:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |  scanf("%s", S + 1);
      |  ~~~~~^~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	4948 KB	Output is correct
2	Correct	3 ms	4988 KB	Output is correct
3	Correct	3 ms	5020 KB	Output is correct
4	Correct	3 ms	4948 KB	Output is correct
5	Correct	4 ms	4948 KB	Output is correct
6	Correct	3 ms	4948 KB	Output is correct
7	Correct	3 ms	4948 KB	Output is correct
8	Correct	2 ms	4996 KB	Output is correct
9	Correct	3 ms	4948 KB	Output is correct
10	Correct	2 ms	4948 KB	Output is correct
11	Correct	3 ms	4948 KB	Output is correct
12	Correct	4 ms	4948 KB	Output is correct
13	Correct	3 ms	4948 KB	Output is correct
14	Correct	2 ms	4996 KB	Output is correct
15	Correct	4 ms	4996 KB	Output is correct
16	Correct	3 ms	4944 KB	Output is correct
17	Correct	3 ms	4948 KB	Output is correct
18	Correct	3 ms	4924 KB	Output is correct
19	Correct	3 ms	5076 KB	Output is correct
20	Correct	3 ms	4948 KB	Output is correct
21	Correct	3 ms	4948 KB	Output is correct

Subtask #2
41.0 / 41.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	4948 KB	Output is correct
2	Correct	3 ms	4988 KB	Output is correct
3	Correct	3 ms	5020 KB	Output is correct
4	Correct	3 ms	4948 KB	Output is correct
5	Correct	4 ms	4948 KB	Output is correct
6	Correct	3 ms	4948 KB	Output is correct
7	Correct	3 ms	4948 KB	Output is correct
8	Correct	2 ms	4996 KB	Output is correct
9	Correct	3 ms	4948 KB	Output is correct
10	Correct	2 ms	4948 KB	Output is correct
11	Correct	3 ms	4948 KB	Output is correct
12	Correct	4 ms	4948 KB	Output is correct
13	Correct	3 ms	4948 KB	Output is correct
14	Correct	2 ms	4996 KB	Output is correct
15	Correct	4 ms	4996 KB	Output is correct
16	Correct	3 ms	4944 KB	Output is correct
17	Correct	3 ms	4948 KB	Output is correct
18	Correct	3 ms	4924 KB	Output is correct
19	Correct	3 ms	5076 KB	Output is correct
20	Correct	3 ms	4948 KB	Output is correct
21	Correct	3 ms	4948 KB	Output is correct
22	Correct	3 ms	5008 KB	Output is correct
23	Correct	4 ms	5076 KB	Output is correct
24	Correct	5 ms	5008 KB	Output is correct
25	Correct	4 ms	5076 KB	Output is correct
26	Correct	3 ms	5008 KB	Output is correct
27	Correct	3 ms	5076 KB	Output is correct
28	Correct	4 ms	5076 KB	Output is correct
29	Correct	4 ms	5132 KB	Output is correct
30	Correct	4 ms	5196 KB	Output is correct
31	Correct	3 ms	5076 KB	Output is correct
32	Correct	5 ms	5076 KB	Output is correct
33	Correct	3 ms	5076 KB	Output is correct
34	Correct	4 ms	5008 KB	Output is correct
35	Correct	3 ms	5008 KB	Output is correct
36	Correct	3 ms	5076 KB	Output is correct
37	Correct	4 ms	5008 KB	Output is correct
38	Correct	4 ms	5076 KB	Output is correct
39	Correct	4 ms	5064 KB	Output is correct
40	Correct	3 ms	5140 KB	Output is correct
41	Correct	4 ms	5076 KB	Output is correct
42	Correct	3 ms	5132 KB	Output is correct
43	Correct	3 ms	5076 KB	Output is correct
44	Correct	3 ms	5068 KB	Output is correct
45	Correct	3 ms	5136 KB	Output is correct
46	Correct	4 ms	5076 KB	Output is correct
47	Correct	3 ms	5076 KB	Output is correct
48	Correct	3 ms	5076 KB	Output is correct
49	Correct	3 ms	5076 KB	Output is correct
50	Correct	3 ms	5076 KB	Output is correct
51	Correct	3 ms	5076 KB	Output is correct
52	Correct	3 ms	5088 KB	Output is correct
53	Correct	3 ms	5076 KB	Output is correct
54	Correct	3 ms	5076 KB	Output is correct
55	Correct	4 ms	5076 KB	Output is correct
56	Correct	3 ms	5004 KB	Output is correct
57	Correct	3 ms	5204 KB	Output is correct
58	Correct	3 ms	5004 KB	Output is correct
59	Correct	4 ms	5076 KB	Output is correct
60	Correct	4 ms	5076 KB	Output is correct
61	Correct	4 ms	5076 KB	Output is correct
62	Correct	4 ms	5204 KB	Output is correct
63	Correct	4 ms	5076 KB	Output is correct

Subtask #3
53.0 / 53.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	4948 KB	Output is correct
2	Correct	3 ms	4988 KB	Output is correct
3	Correct	3 ms	5020 KB	Output is correct
4	Correct	3 ms	4948 KB	Output is correct
5	Correct	4 ms	4948 KB	Output is correct
6	Correct	3 ms	4948 KB	Output is correct
7	Correct	3 ms	4948 KB	Output is correct
8	Correct	2 ms	4996 KB	Output is correct
9	Correct	3 ms	4948 KB	Output is correct
10	Correct	2 ms	4948 KB	Output is correct
11	Correct	3 ms	4948 KB	Output is correct
12	Correct	4 ms	4948 KB	Output is correct
13	Correct	3 ms	4948 KB	Output is correct
14	Correct	2 ms	4996 KB	Output is correct
15	Correct	4 ms	4996 KB	Output is correct
16	Correct	3 ms	4944 KB	Output is correct
17	Correct	3 ms	4948 KB	Output is correct
18	Correct	3 ms	4924 KB	Output is correct
19	Correct	3 ms	5076 KB	Output is correct
20	Correct	3 ms	4948 KB	Output is correct
21	Correct	3 ms	4948 KB	Output is correct
22	Correct	3 ms	5008 KB	Output is correct
23	Correct	4 ms	5076 KB	Output is correct
24	Correct	5 ms	5008 KB	Output is correct
25	Correct	4 ms	5076 KB	Output is correct
26	Correct	3 ms	5008 KB	Output is correct
27	Correct	3 ms	5076 KB	Output is correct
28	Correct	4 ms	5076 KB	Output is correct
29	Correct	4 ms	5132 KB	Output is correct
30	Correct	4 ms	5196 KB	Output is correct
31	Correct	3 ms	5076 KB	Output is correct
32	Correct	5 ms	5076 KB	Output is correct
33	Correct	3 ms	5076 KB	Output is correct
34	Correct	4 ms	5008 KB	Output is correct
35	Correct	3 ms	5008 KB	Output is correct
36	Correct	3 ms	5076 KB	Output is correct
37	Correct	4 ms	5008 KB	Output is correct
38	Correct	4 ms	5076 KB	Output is correct
39	Correct	4 ms	5064 KB	Output is correct
40	Correct	3 ms	5140 KB	Output is correct
41	Correct	4 ms	5076 KB	Output is correct
42	Correct	3 ms	5132 KB	Output is correct
43	Correct	3 ms	5076 KB	Output is correct
44	Correct	3 ms	5068 KB	Output is correct
45	Correct	3 ms	5136 KB	Output is correct
46	Correct	4 ms	5076 KB	Output is correct
47	Correct	3 ms	5076 KB	Output is correct
48	Correct	3 ms	5076 KB	Output is correct
49	Correct	3 ms	5076 KB	Output is correct
50	Correct	3 ms	5076 KB	Output is correct
51	Correct	3 ms	5076 KB	Output is correct
52	Correct	3 ms	5088 KB	Output is correct
53	Correct	3 ms	5076 KB	Output is correct
54	Correct	3 ms	5076 KB	Output is correct
55	Correct	4 ms	5076 KB	Output is correct
56	Correct	3 ms	5004 KB	Output is correct
57	Correct	3 ms	5204 KB	Output is correct
58	Correct	3 ms	5004 KB	Output is correct
59	Correct	4 ms	5076 KB	Output is correct
60	Correct	4 ms	5076 KB	Output is correct
61	Correct	4 ms	5076 KB	Output is correct
62	Correct	4 ms	5204 KB	Output is correct
63	Correct	4 ms	5076 KB	Output is correct
64	Correct	128 ms	15824 KB	Output is correct
65	Correct	132 ms	15892 KB	Output is correct
66	Correct	142 ms	15784 KB	Output is correct
67	Correct	133 ms	15740 KB	Output is correct
68	Correct	124 ms	15816 KB	Output is correct
69	Correct	132 ms	15856 KB	Output is correct
70	Correct	145 ms	15824 KB	Output is correct
71	Correct	149 ms	15812 KB	Output is correct
72	Correct	120 ms	15800 KB	Output is correct
73	Correct	143 ms	31052 KB	Output is correct
74	Correct	152 ms	30828 KB	Output is correct
75	Correct	125 ms	15708 KB	Output is correct
76	Correct	153 ms	15780 KB	Output is correct
77	Correct	147 ms	15596 KB	Output is correct
78	Correct	129 ms	15684 KB	Output is correct
79	Correct	139 ms	15636 KB	Output is correct
80	Correct	157 ms	15636 KB	Output is correct
81	Correct	112 ms	16196 KB	Output is correct
82	Correct	117 ms	15916 KB	Output is correct
83	Correct	149 ms	21920 KB	Output is correct
84	Correct	176 ms	24524 KB	Output is correct
85	Correct	140 ms	24100 KB	Output is correct
86	Correct	139 ms	17352 KB	Output is correct
87	Correct	155 ms	16800 KB	Output is correct
88	Correct	123 ms	17160 KB	Output is correct
89	Correct	129 ms	17204 KB	Output is correct
90	Correct	142 ms	16932 KB	Output is correct
91	Correct	166 ms	17160 KB	Output is correct
92	Correct	122 ms	17564 KB	Output is correct
93	Correct	120 ms	20420 KB	Output is correct
94	Correct	131 ms	22528 KB	Output is correct
95	Correct	135 ms	20980 KB	Output is correct
96	Correct	117 ms	18764 KB	Output is correct
97	Correct	118 ms	16892 KB	Output is correct
98	Correct	123 ms	16436 KB	Output is correct
99	Correct	127 ms	16120 KB	Output is correct
100	Correct	118 ms	19884 KB	Output is correct
101	Correct	120 ms	17676 KB	Output is correct
102	Correct	122 ms	16648 KB	Output is correct
103	Correct	167 ms	16328 KB	Output is correct
104	Correct	80 ms	16524 KB	Output is correct
105	Correct	149 ms	27120 KB	Output is correct
106	Correct	95 ms	16496 KB	Output is correct
107	Correct	90 ms	16356 KB	Output is correct
108	Correct	181 ms	31884 KB	Output is correct
109	Correct	90 ms	16568 KB	Output is correct
110	Correct	165 ms	32344 KB	Output is correct
111	Correct	118 ms	15692 KB	Output is correct

답안 #636819

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