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Submission #763091

# Submission time Handle Problem Language Result Execution time Memory
763091 2023-06-22T03:24:54 Z vjudge1 Power Plant (JOI20_power) C++17
100 / 100
 140 ms 45684 KB 
//#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

# Verdict Execution time Memory Grader output
1 Correct 11 ms 23764 KB Output is correct
2 Correct 12 ms 23764 KB Output is correct
3 Correct 11 ms 23716 KB Output is correct
4 Correct 12 ms 23764 KB Output is correct
5 Correct 11 ms 23764 KB Output is correct
6 Correct 11 ms 23764 KB Output is correct
7 Correct 11 ms 23764 KB Output is correct
8 Correct 12 ms 23772 KB Output is correct
9 Correct 11 ms 23704 KB Output is correct
10 Correct 11 ms 23764 KB Output is correct
11 Correct 11 ms 23764 KB Output is correct
12 Correct 11 ms 23696 KB Output is correct
13 Correct 11 ms 23740 KB Output is correct
14 Correct 12 ms 23764 KB Output is correct
15 Correct 11 ms 23764 KB Output is correct
16 Correct 11 ms 23764 KB Output is correct
17 Correct 11 ms 23764 KB Output is correct
18 Correct 11 ms 23764 KB Output is correct
19 Correct 11 ms 23820 KB Output is correct
20 Correct 13 ms 23764 KB Output is correct
21 Correct 11 ms 23764 KB Output is correct

Subtask #2
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 23764 KB Output is correct
2 Correct 12 ms 23764 KB Output is correct
3 Correct 11 ms 23716 KB Output is correct
4 Correct 12 ms 23764 KB Output is correct
5 Correct 11 ms 23764 KB Output is correct
6 Correct 11 ms 23764 KB Output is correct
7 Correct 11 ms 23764 KB Output is correct
8 Correct 12 ms 23772 KB Output is correct
9 Correct 11 ms 23704 KB Output is correct
10 Correct 11 ms 23764 KB Output is correct
11 Correct 11 ms 23764 KB Output is correct
12 Correct 11 ms 23696 KB Output is correct
13 Correct 11 ms 23740 KB Output is correct
14 Correct 12 ms 23764 KB Output is correct
15 Correct 11 ms 23764 KB Output is correct
16 Correct 11 ms 23764 KB Output is correct
17 Correct 11 ms 23764 KB Output is correct
18 Correct 11 ms 23764 KB Output is correct
19 Correct 11 ms 23820 KB Output is correct
20 Correct 13 ms 23764 KB Output is correct
21 Correct 11 ms 23764 KB Output is correct
22 Correct 12 ms 23892 KB Output is correct
23 Correct 12 ms 23844 KB Output is correct
24 Correct 11 ms 23864 KB Output is correct
25 Correct 11 ms 23864 KB Output is correct
26 Correct 11 ms 23864 KB Output is correct
27 Correct 12 ms 23884 KB Output is correct
28 Correct 12 ms 23804 KB Output is correct
29 Correct 13 ms 24020 KB Output is correct
30 Correct 12 ms 23892 KB Output is correct
31 Correct 11 ms 23892 KB Output is correct
32 Correct 11 ms 23892 KB Output is correct
33 Correct 11 ms 23892 KB Output is correct
34 Correct 12 ms 23892 KB Output is correct
35 Correct 14 ms 23892 KB Output is correct
36 Correct 14 ms 23888 KB Output is correct
37 Correct 12 ms 23892 KB Output is correct
38 Correct 12 ms 23796 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 23868 KB Output is correct
42 Correct 12 ms 23892 KB Output is correct
43 Correct 11 ms 23892 KB Output is correct
44 Correct 12 ms 23892 KB Output is correct
45 Correct 11 ms 23828 KB Output is correct
46 Correct 12 ms 23892 KB Output is correct
47 Correct 12 ms 23892 KB Output is correct
48 Correct 12 ms 23880 KB Output is correct
49 Correct 12 ms 23864 KB Output is correct
50 Correct 12 ms 23892 KB Output is correct
51 Correct 11 ms 23932 KB Output is correct
52 Correct 11 ms 23892 KB Output is correct
53 Correct 11 ms 23892 KB Output is correct
54 Correct 13 ms 23868 KB Output is correct
55 Correct 13 ms 23824 KB Output is correct
56 Correct 12 ms 23892 KB Output is correct
57 Correct 12 ms 23964 KB Output is correct
58 Correct 11 ms 23892 KB Output is correct
59 Correct 11 ms 23892 KB Output is correct
60 Correct 14 ms 23892 KB Output is correct
61 Correct 12 ms 23808 KB Output is correct
62 Correct 11 ms 23892 KB Output is correct
63 Correct 12 ms 23892 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 23764 KB Output is correct
2 Correct 12 ms 23764 KB Output is correct
3 Correct 11 ms 23716 KB Output is correct
4 Correct 12 ms 23764 KB Output is correct
5 Correct 11 ms 23764 KB Output is correct
6 Correct 11 ms 23764 KB Output is correct
7 Correct 11 ms 23764 KB Output is correct
8 Correct 12 ms 23772 KB Output is correct
9 Correct 11 ms 23704 KB Output is correct
10 Correct 11 ms 23764 KB Output is correct
11 Correct 11 ms 23764 KB Output is correct
12 Correct 11 ms 23696 KB Output is correct
13 Correct 11 ms 23740 KB Output is correct
14 Correct 12 ms 23764 KB Output is correct
15 Correct 11 ms 23764 KB Output is correct
16 Correct 11 ms 23764 KB Output is correct
17 Correct 11 ms 23764 KB Output is correct
18 Correct 11 ms 23764 KB Output is correct
19 Correct 11 ms 23820 KB Output is correct
20 Correct 13 ms 23764 KB Output is correct
21 Correct 11 ms 23764 KB Output is correct
22 Correct 12 ms 23892 KB Output is correct
23 Correct 12 ms 23844 KB Output is correct
24 Correct 11 ms 23864 KB Output is correct
25 Correct 11 ms 23864 KB Output is correct
26 Correct 11 ms 23864 KB Output is correct
27 Correct 12 ms 23884 KB Output is correct
28 Correct 12 ms 23804 KB Output is correct
29 Correct 13 ms 24020 KB Output is correct
30 Correct 12 ms 23892 KB Output is correct
31 Correct 11 ms 23892 KB Output is correct
32 Correct 11 ms 23892 KB Output is correct
33 Correct 11 ms 23892 KB Output is correct
34 Correct 12 ms 23892 KB Output is correct
35 Correct 14 ms 23892 KB Output is correct
36 Correct 14 ms 23888 KB Output is correct
37 Correct 12 ms 23892 KB Output is correct
38 Correct 12 ms 23796 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 23868 KB Output is correct
42 Correct 12 ms 23892 KB Output is correct
43 Correct 11 ms 23892 KB Output is correct
44 Correct 12 ms 23892 KB Output is correct
45 Correct 11 ms 23828 KB Output is correct
46 Correct 12 ms 23892 KB Output is correct
47 Correct 12 ms 23892 KB Output is correct
48 Correct 12 ms 23880 KB Output is correct
49 Correct 12 ms 23864 KB Output is correct
50 Correct 12 ms 23892 KB Output is correct
51 Correct 11 ms 23932 KB Output is correct
52 Correct 11 ms 23892 KB Output is correct
53 Correct 11 ms 23892 KB Output is correct
54 Correct 13 ms 23868 KB Output is correct
55 Correct 13 ms 23824 KB Output is correct
56 Correct 12 ms 23892 KB Output is correct
57 Correct 12 ms 23964 KB Output is correct
58 Correct 11 ms 23892 KB Output is correct
59 Correct 11 ms 23892 KB Output is correct
60 Correct 14 ms 23892 KB Output is correct
61 Correct 12 ms 23808 KB Output is correct
62 Correct 11 ms 23892 KB Output is correct
63 Correct 12 ms 23892 KB Output is correct
64 Correct 82 ms 32832 KB Output is correct
65 Correct 82 ms 32912 KB Output is correct
66 Correct 86 ms 32880 KB Output is correct
67 Correct 82 ms 32884 KB Output is correct
68 Correct 86 ms 32828 KB Output is correct
69 Correct 81 ms 32824 KB Output is correct
70 Correct 83 ms 32792 KB Output is correct
71 Correct 85 ms 32844 KB Output is correct
72 Correct 101 ms 32828 KB Output is correct
73 Correct 140 ms 44484 KB Output is correct
74 Correct 99 ms 44492 KB Output is correct
75 Correct 97 ms 34100 KB Output is correct
76 Correct 101 ms 34148 KB Output is correct
77 Correct 115 ms 32820 KB Output is correct
78 Correct 81 ms 32788 KB Output is correct
79 Correct 80 ms 32848 KB Output is correct
80 Correct 90 ms 32864 KB Output is correct
81 Correct 73 ms 32876 KB Output is correct
82 Correct 94 ms 32920 KB Output is correct
83 Correct 105 ms 38012 KB Output is correct
84 Correct 94 ms 40036 KB Output is correct
85 Correct 94 ms 39780 KB Output is correct
86 Correct 83 ms 34184 KB Output is correct
87 Correct 88 ms 33596 KB Output is correct
88 Correct 81 ms 33740 KB Output is correct
89 Correct 85 ms 33740 KB Output is correct
90 Correct 98 ms 33580 KB Output is correct
91 Correct 111 ms 33736 KB Output is correct
92 Correct 82 ms 34124 KB Output is correct
93 Correct 99 ms 36316 KB Output is correct
94 Correct 80 ms 38028 KB Output is correct
95 Correct 83 ms 36672 KB Output is correct
96 Correct 82 ms 34916 KB Output is correct
97 Correct 85 ms 33388 KB Output is correct
98 Correct 106 ms 33028 KB Output is correct
99 Correct 78 ms 32884 KB Output is correct
100 Correct 83 ms 35884 KB Output is correct
101 Correct 90 ms 33724 KB Output is correct
102 Correct 79 ms 33168 KB Output is correct
103 Correct 81 ms 33124 KB Output is correct
104 Correct 61 ms 33356 KB Output is correct
105 Correct 99 ms 41356 KB Output is correct
106 Correct 61 ms 33388 KB Output is correct
107 Correct 60 ms 33352 KB Output is correct
108 Correct 102 ms 45276 KB Output is correct
109 Correct 61 ms 33380 KB Output is correct
110 Correct 125 ms 45684 KB Output is correct
111 Correct 77 ms 32832 KB Output is correct