oj.uz

Submission #330941

# Submission time Handle Problem Language Result Execution time Memory
330941 2020-11-27T00:07:21 Z eggag32 Power Plant (JOI20_power) C++17
100 / 100
 205 ms 29740 KB 
#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
typedef vector<int> vi;
typedef pair<int, int> pi;
#define debug(x) cerr << #x << ": " << x << endl
#define debug2(x, y) debug(x), debug(y)
#define repn(i, a, b) for(int i = (int)(a); i < (int)(b); i++)
#define rep(i, a) for(int i = 0; i < (int)(a); i++)
#define all(v) v.begin(), v.end() 
#define mp make_pair
#define pb push_back
#define lb lower_bound
#define ub upper_bound
#define fi first
#define se second
#define sq(x) ((x) * (x))
const int mxN = 2e5 + 5;
 
template<class T> T gcd(T a, T b){ return ((b == 0) ? a : gcd(b, a % b)); }
 
int n;
int dp[mxN][2];
string s;
vi g[mxN];
 
void dfs(int cur, int prev){
	if(s[cur] == '1') dp[cur][0] = 1;
	int tot = 0, mx = 0;
	for(int x : g[cur]) if(x != prev){
		dfs(x, cur);
		tot += dp[x][0];
		mx = max(mx, dp[x][0]);
	}
	dp[cur][0] = max(tot - (s[cur] == '1'), dp[cur][0]);
	if(s[cur] == '1') dp[cur][1] = mx + 1;
}
 
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	//freopen("input.in", "r", stdin);
	//freopen("output.out", "w", stdout);
	cin >> n;
	int cnt = 0;
	rep(i, n - 1){
		int a, b;
		cin >> a >> b;
		a--, b--;
		g[a].pb(b);
		g[b].pb(a);
	}
	cin >> s;
	rep(i, n) cnt += (s[i] == '1');
	int ans = 0, mn = 0;
	if(cnt == 2) mn = 2;
	dfs(0, -1);
	rep(i, n) ans = max({ans, dp[i][0], dp[i][1]});
	cout << max(mn, ans) << endl;
	return 0;
}
/*
Things to look out for:
	- Integer overflows
	- Make sure that max is large enough (2e9, 4e18)
	- Special cases
Be careful!
*/

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 4 ms 5100 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 4 ms 5100 KB Output is correct
5 Correct 4 ms 5100 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 4 ms 5100 KB Output is correct
8 Correct 5 ms 5100 KB Output is correct
9 Correct 4 ms 5100 KB Output is correct
10 Correct 4 ms 5100 KB Output is correct
11 Correct 4 ms 5100 KB Output is correct
12 Correct 4 ms 5100 KB Output is correct
13 Correct 4 ms 5100 KB Output is correct
14 Correct 4 ms 5100 KB Output is correct
15 Correct 5 ms 5100 KB Output is correct
16 Correct 4 ms 5100 KB Output is correct
17 Correct 4 ms 5100 KB Output is correct
18 Correct 4 ms 5116 KB Output is correct
19 Correct 4 ms 5228 KB Output is correct
20 Correct 4 ms 5116 KB Output is correct
21 Correct 4 ms 5100 KB Output is correct

Subtask #2
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 4 ms 5100 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 4 ms 5100 KB Output is correct
5 Correct 4 ms 5100 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 4 ms 5100 KB Output is correct
8 Correct 5 ms 5100 KB Output is correct
9 Correct 4 ms 5100 KB Output is correct
10 Correct 4 ms 5100 KB Output is correct
11 Correct 4 ms 5100 KB Output is correct
12 Correct 4 ms 5100 KB Output is correct
13 Correct 4 ms 5100 KB Output is correct
14 Correct 4 ms 5100 KB Output is correct
15 Correct 5 ms 5100 KB Output is correct
16 Correct 4 ms 5100 KB Output is correct
17 Correct 4 ms 5100 KB Output is correct
18 Correct 4 ms 5116 KB Output is correct
19 Correct 4 ms 5228 KB Output is correct
20 Correct 4 ms 5116 KB Output is correct
21 Correct 4 ms 5100 KB Output is correct
22 Correct 5 ms 5100 KB Output is correct
23 Correct 4 ms 5100 KB Output is correct
24 Correct 4 ms 5100 KB Output is correct
25 Correct 5 ms 5100 KB Output is correct
26 Correct 5 ms 5100 KB Output is correct
27 Correct 5 ms 5100 KB Output is correct
28 Correct 7 ms 5100 KB Output is correct
29 Correct 6 ms 5228 KB Output is correct
30 Correct 5 ms 5228 KB Output is correct
31 Correct 6 ms 5100 KB Output is correct
32 Correct 5 ms 5100 KB Output is correct
33 Correct 4 ms 5100 KB Output is correct
34 Correct 4 ms 5100 KB Output is correct
35 Correct 4 ms 5100 KB Output is correct
36 Correct 5 ms 5100 KB Output is correct
37 Correct 5 ms 5100 KB Output is correct
38 Correct 5 ms 5100 KB Output is correct
39 Correct 5 ms 5228 KB Output is correct
40 Correct 5 ms 5100 KB Output is correct
41 Correct 5 ms 5228 KB Output is correct
42 Correct 5 ms 5100 KB Output is correct
43 Correct 5 ms 5100 KB Output is correct
44 Correct 5 ms 5100 KB Output is correct
45 Correct 5 ms 5100 KB Output is correct
46 Correct 6 ms 5100 KB Output is correct
47 Correct 5 ms 5108 KB Output is correct
48 Correct 5 ms 5228 KB Output is correct
49 Correct 4 ms 5228 KB Output is correct
50 Correct 5 ms 5100 KB Output is correct
51 Correct 5 ms 5100 KB Output is correct
52 Correct 5 ms 5100 KB Output is correct
53 Correct 5 ms 5100 KB Output is correct
54 Correct 5 ms 5100 KB Output is correct
55 Correct 5 ms 5100 KB Output is correct
56 Correct 4 ms 5100 KB Output is correct
57 Correct 5 ms 5228 KB Output is correct
58 Correct 9 ms 5100 KB Output is correct
59 Correct 4 ms 5100 KB Output is correct
60 Correct 5 ms 5228 KB Output is correct
61 Correct 5 ms 5100 KB Output is correct
62 Correct 5 ms 5228 KB Output is correct
63 Correct 4 ms 5100 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 4 ms 5100 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 4 ms 5100 KB Output is correct
5 Correct 4 ms 5100 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 4 ms 5100 KB Output is correct
8 Correct 5 ms 5100 KB Output is correct
9 Correct 4 ms 5100 KB Output is correct
10 Correct 4 ms 5100 KB Output is correct
11 Correct 4 ms 5100 KB Output is correct
12 Correct 4 ms 5100 KB Output is correct
13 Correct 4 ms 5100 KB Output is correct
14 Correct 4 ms 5100 KB Output is correct
15 Correct 5 ms 5100 KB Output is correct
16 Correct 4 ms 5100 KB Output is correct
17 Correct 4 ms 5100 KB Output is correct
18 Correct 4 ms 5116 KB Output is correct
19 Correct 4 ms 5228 KB Output is correct
20 Correct 4 ms 5116 KB Output is correct
21 Correct 4 ms 5100 KB Output is correct
22 Correct 5 ms 5100 KB Output is correct
23 Correct 4 ms 5100 KB Output is correct
24 Correct 4 ms 5100 KB Output is correct
25 Correct 5 ms 5100 KB Output is correct
26 Correct 5 ms 5100 KB Output is correct
27 Correct 5 ms 5100 KB Output is correct
28 Correct 7 ms 5100 KB Output is correct
29 Correct 6 ms 5228 KB Output is correct
30 Correct 5 ms 5228 KB Output is correct
31 Correct 6 ms 5100 KB Output is correct
32 Correct 5 ms 5100 KB Output is correct
33 Correct 4 ms 5100 KB Output is correct
34 Correct 4 ms 5100 KB Output is correct
35 Correct 4 ms 5100 KB Output is correct
36 Correct 5 ms 5100 KB Output is correct
37 Correct 5 ms 5100 KB Output is correct
38 Correct 5 ms 5100 KB Output is correct
39 Correct 5 ms 5228 KB Output is correct
40 Correct 5 ms 5100 KB Output is correct
41 Correct 5 ms 5228 KB Output is correct
42 Correct 5 ms 5100 KB Output is correct
43 Correct 5 ms 5100 KB Output is correct
44 Correct 5 ms 5100 KB Output is correct
45 Correct 5 ms 5100 KB Output is correct
46 Correct 6 ms 5100 KB Output is correct
47 Correct 5 ms 5108 KB Output is correct
48 Correct 5 ms 5228 KB Output is correct
49 Correct 4 ms 5228 KB Output is correct
50 Correct 5 ms 5100 KB Output is correct
51 Correct 5 ms 5100 KB Output is correct
52 Correct 5 ms 5100 KB Output is correct
53 Correct 5 ms 5100 KB Output is correct
54 Correct 5 ms 5100 KB Output is correct
55 Correct 5 ms 5100 KB Output is correct
56 Correct 4 ms 5100 KB Output is correct
57 Correct 5 ms 5228 KB Output is correct
58 Correct 9 ms 5100 KB Output is correct
59 Correct 4 ms 5100 KB Output is correct
60 Correct 5 ms 5228 KB Output is correct
61 Correct 5 ms 5100 KB Output is correct
62 Correct 5 ms 5228 KB Output is correct
63 Correct 4 ms 5100 KB Output is correct
64 Correct 189 ms 16016 KB Output is correct
65 Correct 183 ms 16044 KB Output is correct
66 Correct 173 ms 16024 KB Output is correct
67 Correct 179 ms 16044 KB Output is correct
68 Correct 165 ms 16024 KB Output is correct
69 Correct 166 ms 16040 KB Output is correct
70 Correct 190 ms 16060 KB Output is correct
71 Correct 169 ms 16056 KB Output is correct
72 Correct 180 ms 16168 KB Output is correct
73 Correct 199 ms 28844 KB Output is correct
74 Correct 202 ms 28528 KB Output is correct
75 Correct 164 ms 16040 KB Output is correct
76 Correct 170 ms 16048 KB Output is correct
77 Correct 189 ms 16040 KB Output is correct
78 Correct 179 ms 16004 KB Output is correct
79 Correct 176 ms 15920 KB Output is correct
80 Correct 180 ms 16040 KB Output is correct
81 Correct 164 ms 16312 KB Output is correct
82 Correct 169 ms 16108 KB Output is correct
83 Correct 180 ms 21168 KB Output is correct
84 Correct 179 ms 23224 KB Output is correct
85 Correct 179 ms 22968 KB Output is correct
86 Correct 186 ms 17452 KB Output is correct
87 Correct 173 ms 16808 KB Output is correct
88 Correct 161 ms 17256 KB Output is correct
89 Correct 168 ms 17208 KB Output is correct
90 Correct 167 ms 17036 KB Output is correct
91 Correct 177 ms 17424 KB Output is correct
92 Correct 161 ms 17560 KB Output is correct
93 Correct 156 ms 19964 KB Output is correct
94 Correct 158 ms 21732 KB Output is correct
95 Correct 164 ms 20452 KB Output is correct
96 Correct 173 ms 18584 KB Output is correct
97 Correct 157 ms 17156 KB Output is correct
98 Correct 150 ms 16604 KB Output is correct
99 Correct 172 ms 16424 KB Output is correct
100 Correct 157 ms 19736 KB Output is correct
101 Correct 166 ms 17640 KB Output is correct
102 Correct 145 ms 16764 KB Output is correct
103 Correct 160 ms 16588 KB Output is correct
104 Correct 112 ms 16864 KB Output is correct
105 Correct 198 ms 25492 KB Output is correct
106 Correct 111 ms 16736 KB Output is correct
107 Correct 112 ms 16736 KB Output is correct
108 Correct 205 ms 29356 KB Output is correct
109 Correct 121 ms 16956 KB Output is correct
110 Correct 194 ms 29740 KB Output is correct
111 Correct 183 ms 16056 KB Output is correct