답안 #763090

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
763090	2023-06-22T03:24:32 Z	trucmai	Power Plant (JOI20_power)	C++17	100 / 100	128 ms	45540 KB

power

//#i_love_aisukiuwu#9998

#include <bits/stdc++.h>
using namespace std;

void open(){
  if(fopen("i.inp","r")){
    freopen("i.inp","r",stdin);
    freopen("o.out","w",stdout);
  }
}

#define ll long long
#define all(a) (a).begin(), (a).end()
#define vi vector<ll>
#define pi pair<ll,ll>
#define pii pair<ll,pair<ll,ll>>
#define fi first
#define se second
#define gcd __gcd
#define mset(a,v) memset(a, v, sizeof(a))
#define endl '\n'
#define spc " "

const int MN1 = 1e6 + 5,MN2 = 1e4 + 5,LOG = 27;
const ll MOD = 1e9 + 7,INF = 1e9;
ll n,dp[MN1],res = -INF;
bool power[MN1]; 
vector<ll>adj[MN1];
//dp[u] la max profit tai subtree u
//dp[u] = max(power[u],sum_{v = G[u]} dp[v] - power[u]) 

void dfs(ll u,ll pre){
	ll sum = 0,mx = 0;
	dp[u] = 1;
	for(ll v : adj[u]){
		if(v == pre) continue;
		dfs(v,u);
		sum += dp[v];
		mx = max(mx,dp[v]);
	}
	dp[u] = max((ll)power[u],sum - power[u]);
	res = max({res,sum - power[u],mx + power[u]});
}

void solve(){
	cin>>n;
	for(ll i = 1;i < n;++i){
		ll u,v;cin>>u>>v;
		adj[u].push_back(v);
		adj[v].push_back(u);
	}
	for(ll i = 1;i <= n;++i){
		char c; cin>>c; 
		power[i] = (c == '1');
	}
	dfs(1,1);
	cout<<res;
}

signed main(){
  cin.tie(0) -> sync_with_stdio(0);
  open();
  ll t = 1; //cin>>t;
  while(t--) solve(); 
  cerr << "\n" << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
}

Compilation message

power.cpp: In function 'void open()':
power.cpp:8:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    8 |     freopen("i.inp","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~
power.cpp:9:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |     freopen("o.out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

#	결과	실행 시간	메모리	Grader output
1	Correct	11 ms	23712 KB	Output is correct
2	Correct	12 ms	23700 KB	Output is correct
3	Correct	12 ms	23764 KB	Output is correct
4	Correct	11 ms	23812 KB	Output is correct
5	Correct	11 ms	23764 KB	Output is correct
6	Correct	12 ms	23764 KB	Output is correct
7	Correct	11 ms	23756 KB	Output is correct
8	Correct	11 ms	23816 KB	Output is correct
9	Correct	11 ms	23764 KB	Output is correct
10	Correct	11 ms	23764 KB	Output is correct
11	Correct	13 ms	23784 KB	Output is correct
12	Correct	11 ms	23764 KB	Output is correct
13	Correct	10 ms	23764 KB	Output is correct
14	Correct	11 ms	23764 KB	Output is correct
15	Correct	11 ms	23764 KB	Output is correct
16	Correct	12 ms	23808 KB	Output is correct
17	Correct	11 ms	23752 KB	Output is correct
18	Correct	12 ms	23756 KB	Output is correct
19	Correct	11 ms	23764 KB	Output is correct
20	Correct	12 ms	23724 KB	Output is correct
21	Correct	11 ms	23752 KB	Output is correct

Subtask #2
41.0 / 41.0

#	결과	실행 시간	메모리	Grader output
1	Correct	11 ms	23712 KB	Output is correct
2	Correct	12 ms	23700 KB	Output is correct
3	Correct	12 ms	23764 KB	Output is correct
4	Correct	11 ms	23812 KB	Output is correct
5	Correct	11 ms	23764 KB	Output is correct
6	Correct	12 ms	23764 KB	Output is correct
7	Correct	11 ms	23756 KB	Output is correct
8	Correct	11 ms	23816 KB	Output is correct
9	Correct	11 ms	23764 KB	Output is correct
10	Correct	11 ms	23764 KB	Output is correct
11	Correct	13 ms	23784 KB	Output is correct
12	Correct	11 ms	23764 KB	Output is correct
13	Correct	10 ms	23764 KB	Output is correct
14	Correct	11 ms	23764 KB	Output is correct
15	Correct	11 ms	23764 KB	Output is correct
16	Correct	12 ms	23808 KB	Output is correct
17	Correct	11 ms	23752 KB	Output is correct
18	Correct	12 ms	23756 KB	Output is correct
19	Correct	11 ms	23764 KB	Output is correct
20	Correct	12 ms	23724 KB	Output is correct
21	Correct	11 ms	23752 KB	Output is correct
22	Correct	11 ms	23868 KB	Output is correct
23	Correct	11 ms	23844 KB	Output is correct
24	Correct	11 ms	23892 KB	Output is correct
25	Correct	12 ms	23828 KB	Output is correct
26	Correct	11 ms	23832 KB	Output is correct
27	Correct	12 ms	23788 KB	Output is correct
28	Correct	12 ms	23892 KB	Output is correct
29	Correct	12 ms	24020 KB	Output is correct
30	Correct	12 ms	23892 KB	Output is correct
31	Correct	14 ms	23892 KB	Output is correct
32	Correct	11 ms	23892 KB	Output is correct
33	Correct	12 ms	23888 KB	Output is correct
34	Correct	12 ms	23792 KB	Output is correct
35	Correct	12 ms	23892 KB	Output is correct
36	Correct	12 ms	23892 KB	Output is correct
37	Correct	11 ms	23892 KB	Output is correct
38	Correct	12 ms	23860 KB	Output is correct
39	Correct	11 ms	23892 KB	Output is correct
40	Correct	12 ms	23892 KB	Output is correct
41	Correct	12 ms	23860 KB	Output is correct
42	Correct	13 ms	23860 KB	Output is correct
43	Correct	12 ms	23892 KB	Output is correct
44	Correct	12 ms	23892 KB	Output is correct
45	Correct	12 ms	23892 KB	Output is correct
46	Correct	12 ms	23892 KB	Output is correct
47	Correct	13 ms	23892 KB	Output is correct
48	Correct	11 ms	23864 KB	Output is correct
49	Correct	13 ms	23988 KB	Output is correct
50	Correct	12 ms	23824 KB	Output is correct
51	Correct	14 ms	23892 KB	Output is correct
52	Correct	13 ms	23888 KB	Output is correct
53	Correct	12 ms	23892 KB	Output is correct
54	Correct	13 ms	23892 KB	Output is correct
55	Correct	12 ms	23892 KB	Output is correct
56	Correct	12 ms	23892 KB	Output is correct
57	Correct	12 ms	24020 KB	Output is correct
58	Correct	12 ms	23872 KB	Output is correct
59	Correct	11 ms	23892 KB	Output is correct
60	Correct	13 ms	23892 KB	Output is correct
61	Correct	12 ms	23892 KB	Output is correct
62	Correct	12 ms	23892 KB	Output is correct
63	Correct	12 ms	23808 KB	Output is correct

Subtask #3
53.0 / 53.0

#	결과	실행 시간	메모리	Grader output
1	Correct	11 ms	23712 KB	Output is correct
2	Correct	12 ms	23700 KB	Output is correct
3	Correct	12 ms	23764 KB	Output is correct
4	Correct	11 ms	23812 KB	Output is correct
5	Correct	11 ms	23764 KB	Output is correct
6	Correct	12 ms	23764 KB	Output is correct
7	Correct	11 ms	23756 KB	Output is correct
8	Correct	11 ms	23816 KB	Output is correct
9	Correct	11 ms	23764 KB	Output is correct
10	Correct	11 ms	23764 KB	Output is correct
11	Correct	13 ms	23784 KB	Output is correct
12	Correct	11 ms	23764 KB	Output is correct
13	Correct	10 ms	23764 KB	Output is correct
14	Correct	11 ms	23764 KB	Output is correct
15	Correct	11 ms	23764 KB	Output is correct
16	Correct	12 ms	23808 KB	Output is correct
17	Correct	11 ms	23752 KB	Output is correct
18	Correct	12 ms	23756 KB	Output is correct
19	Correct	11 ms	23764 KB	Output is correct
20	Correct	12 ms	23724 KB	Output is correct
21	Correct	11 ms	23752 KB	Output is correct
22	Correct	11 ms	23868 KB	Output is correct
23	Correct	11 ms	23844 KB	Output is correct
24	Correct	11 ms	23892 KB	Output is correct
25	Correct	12 ms	23828 KB	Output is correct
26	Correct	11 ms	23832 KB	Output is correct
27	Correct	12 ms	23788 KB	Output is correct
28	Correct	12 ms	23892 KB	Output is correct
29	Correct	12 ms	24020 KB	Output is correct
30	Correct	12 ms	23892 KB	Output is correct
31	Correct	14 ms	23892 KB	Output is correct
32	Correct	11 ms	23892 KB	Output is correct
33	Correct	12 ms	23888 KB	Output is correct
34	Correct	12 ms	23792 KB	Output is correct
35	Correct	12 ms	23892 KB	Output is correct
36	Correct	12 ms	23892 KB	Output is correct
37	Correct	11 ms	23892 KB	Output is correct
38	Correct	12 ms	23860 KB	Output is correct
39	Correct	11 ms	23892 KB	Output is correct
40	Correct	12 ms	23892 KB	Output is correct
41	Correct	12 ms	23860 KB	Output is correct
42	Correct	13 ms	23860 KB	Output is correct
43	Correct	12 ms	23892 KB	Output is correct
44	Correct	12 ms	23892 KB	Output is correct
45	Correct	12 ms	23892 KB	Output is correct
46	Correct	12 ms	23892 KB	Output is correct
47	Correct	13 ms	23892 KB	Output is correct
48	Correct	11 ms	23864 KB	Output is correct
49	Correct	13 ms	23988 KB	Output is correct
50	Correct	12 ms	23824 KB	Output is correct
51	Correct	14 ms	23892 KB	Output is correct
52	Correct	13 ms	23888 KB	Output is correct
53	Correct	12 ms	23892 KB	Output is correct
54	Correct	13 ms	23892 KB	Output is correct
55	Correct	12 ms	23892 KB	Output is correct
56	Correct	12 ms	23892 KB	Output is correct
57	Correct	12 ms	24020 KB	Output is correct
58	Correct	12 ms	23872 KB	Output is correct
59	Correct	11 ms	23892 KB	Output is correct
60	Correct	13 ms	23892 KB	Output is correct
61	Correct	12 ms	23892 KB	Output is correct
62	Correct	12 ms	23892 KB	Output is correct
63	Correct	12 ms	23808 KB	Output is correct
64	Correct	82 ms	32788 KB	Output is correct
65	Correct	93 ms	32844 KB	Output is correct
66	Correct	86 ms	32856 KB	Output is correct
67	Correct	81 ms	32816 KB	Output is correct
68	Correct	99 ms	32940 KB	Output is correct
69	Correct	84 ms	32892 KB	Output is correct
70	Correct	85 ms	32788 KB	Output is correct
71	Correct	86 ms	32844 KB	Output is correct
72	Correct	82 ms	32912 KB	Output is correct
73	Correct	102 ms	44500 KB	Output is correct
74	Correct	103 ms	44492 KB	Output is correct
75	Correct	95 ms	34164 KB	Output is correct
76	Correct	85 ms	34148 KB	Output is correct
77	Correct	89 ms	32824 KB	Output is correct
78	Correct	84 ms	32816 KB	Output is correct
79	Correct	85 ms	32868 KB	Output is correct
80	Correct	83 ms	32804 KB	Output is correct
81	Correct	74 ms	32932 KB	Output is correct
82	Correct	78 ms	32760 KB	Output is correct
83	Correct	91 ms	37920 KB	Output is correct
84	Correct	117 ms	40016 KB	Output is correct
85	Correct	103 ms	39748 KB	Output is correct
86	Correct	89 ms	34252 KB	Output is correct
87	Correct	83 ms	33676 KB	Output is correct
88	Correct	107 ms	33680 KB	Output is correct
89	Correct	104 ms	33844 KB	Output is correct
90	Correct	81 ms	33600 KB	Output is correct
91	Correct	85 ms	33740 KB	Output is correct
92	Correct	87 ms	34124 KB	Output is correct
93	Correct	83 ms	36296 KB	Output is correct
94	Correct	103 ms	38172 KB	Output is correct
95	Correct	93 ms	36608 KB	Output is correct
96	Correct	112 ms	34848 KB	Output is correct
97	Correct	85 ms	33416 KB	Output is correct
98	Correct	82 ms	32996 KB	Output is correct
99	Correct	86 ms	32972 KB	Output is correct
100	Correct	97 ms	35828 KB	Output is correct
101	Correct	82 ms	33756 KB	Output is correct
102	Correct	82 ms	33108 KB	Output is correct
103	Correct	97 ms	33108 KB	Output is correct
104	Correct	62 ms	33336 KB	Output is correct
105	Correct	121 ms	41368 KB	Output is correct
106	Correct	61 ms	33344 KB	Output is correct
107	Correct	61 ms	33340 KB	Output is correct
108	Correct	128 ms	45280 KB	Output is correct
109	Correct	61 ms	33372 KB	Output is correct
110	Correct	105 ms	45540 KB	Output is correct
111	Correct	101 ms	32932 KB	Output is correct

답안 #763090

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