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Submission #1036344

# Submission time Handle Problem Language Result Execution time Memory
1036344 2024-07-27T09:39:18 Z underwaterkillerwhale Power Plant (JOI20_power) C++17
100 / 100
 81 ms 28568 KB 
#include <bits/stdc++.h>
#define se              second
#define fs              first
#define mp              make_pair
#define pb              push_back
#define ll              long long
#define ii              pair<ll,ll>
#define ld              long double
#define SZ(v)           (int)v.size()
#define ALL(v)          v.begin(), v.end()
#define bit(msk, i)     ((msk >> i) & 1)
#define iter(id, v)     for(auto id : v)
#define rep(i,m,n)      for(int i=(m); i<=(n); i++)
#define reb(i,m,n)      for(int i=(m); i>=(n); i--)
using namespace std;

mt19937_64 rd(chrono :: steady_clock :: now().time_since_epoch().count());
ll Rand(ll l, ll r) { return uniform_int_distribution<ll> (l, r)(rd); }

const int N = 2e5 + 7;
const int Mod = 1e9 + 7;
const int szBL = 240;
const ll  INF = 1e18;
const int BASE = 137;

int n;
vector<int> ke[N];
int dp[N][3];
int a[N];

void dfs (int u, int p ) {
    iter (&v, ke[u]) {
        if (v == p) continue;
        dfs(v, u);
    }
    dp[u][0] = 0;
    {
        int sum = 0;
        iter (&v, ke[u]) {
            if (v == p) continue;
            sum += dp[v][1];
        }
        dp[u][1] = max(a[u], sum - a[u]);
    }
    int sum = 0;
    iter (&v, ke[u]) {
        if (v == p) continue;
        sum += dp[v][1];
        dp[u][2] = max(dp[u][2], max(dp[v][1] + a[u], dp[v][2] - a[u]));
    }
    dp[u][2] = max(dp[u][2], sum - a[u]);
}

void solution (){
    cin >> n;
    rep (i, 1, n - 1) {
        int u, v;
        cin >> u >> v;
        ke[u].push_back(v);
        ke[v].push_back(u);\
    }
    string s;
    cin >> s;
    rep (i, 1, n) {
        a[i] = s[i - 1] - '0';
    }
    dfs(1, 0);
    int res = 0;
    rep (i, 1, n)
    rep (j, 0, 2) res = max(res, dp[i][j]);
    cout << res<<"\n";
}

#define file(name) freopen(name".inp", "r", stdin); \
freopen(name".out", "w", stdout);
/*
*/
int main () {
//    file("c");
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    ll num_Test = 1;
//    cin >> num_Test;
    while(num_Test--)
        solution();
}
/*
no bug challenge +2

*/

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 5164 KB Output is correct
3 Correct 2 ms 4984 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 2 ms 4956 KB Output is correct
6 Correct 2 ms 5164 KB Output is correct
7 Correct 2 ms 5168 KB Output is correct
8 Correct 2 ms 4956 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 2 ms 5164 KB Output is correct
11 Correct 3 ms 4956 KB Output is correct
12 Correct 2 ms 4956 KB Output is correct
13 Correct 2 ms 4956 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 2 ms 4956 KB Output is correct
16 Correct 2 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 2 ms 5164 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 2 ms 5172 KB Output is correct
21 Correct 2 ms 4952 KB Output is correct

Subtask #2
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 5164 KB Output is correct
3 Correct 2 ms 4984 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 2 ms 4956 KB Output is correct
6 Correct 2 ms 5164 KB Output is correct
7 Correct 2 ms 5168 KB Output is correct
8 Correct 2 ms 4956 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 2 ms 5164 KB Output is correct
11 Correct 3 ms 4956 KB Output is correct
12 Correct 2 ms 4956 KB Output is correct
13 Correct 2 ms 4956 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 2 ms 4956 KB Output is correct
16 Correct 2 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 2 ms 5164 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 2 ms 5172 KB Output is correct
21 Correct 2 ms 4952 KB Output is correct
22 Correct 3 ms 5208 KB Output is correct
23 Correct 3 ms 5212 KB Output is correct
24 Correct 2 ms 5212 KB Output is correct
25 Correct 2 ms 5212 KB Output is correct
26 Correct 2 ms 5212 KB Output is correct
27 Correct 2 ms 5176 KB Output is correct
28 Correct 3 ms 5224 KB Output is correct
29 Correct 2 ms 5212 KB Output is correct
30 Correct 3 ms 5212 KB Output is correct
31 Correct 2 ms 5212 KB Output is correct
32 Correct 2 ms 5212 KB Output is correct
33 Correct 2 ms 5212 KB Output is correct
34 Correct 2 ms 5240 KB Output is correct
35 Correct 2 ms 5212 KB Output is correct
36 Correct 2 ms 5212 KB Output is correct
37 Correct 3 ms 5212 KB Output is correct
38 Correct 2 ms 5212 KB Output is correct
39 Correct 2 ms 5212 KB Output is correct
40 Correct 3 ms 5212 KB Output is correct
41 Correct 2 ms 5288 KB Output is correct
42 Correct 2 ms 5212 KB Output is correct
43 Correct 3 ms 5212 KB Output is correct
44 Correct 3 ms 5208 KB Output is correct
45 Correct 3 ms 5212 KB Output is correct
46 Correct 2 ms 5212 KB Output is correct
47 Correct 2 ms 5212 KB Output is correct
48 Correct 2 ms 5212 KB Output is correct
49 Correct 3 ms 5212 KB Output is correct
50 Correct 2 ms 5212 KB Output is correct
51 Correct 3 ms 5064 KB Output is correct
52 Correct 2 ms 5212 KB Output is correct
53 Correct 2 ms 5212 KB Output is correct
54 Correct 3 ms 5212 KB Output is correct
55 Correct 3 ms 5212 KB Output is correct
56 Correct 2 ms 5212 KB Output is correct
57 Correct 3 ms 5248 KB Output is correct
58 Correct 3 ms 5208 KB Output is correct
59 Correct 2 ms 5212 KB Output is correct
60 Correct 3 ms 5212 KB Output is correct
61 Correct 2 ms 5212 KB Output is correct
62 Correct 2 ms 5248 KB Output is correct
63 Correct 2 ms 5212 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 5164 KB Output is correct
3 Correct 2 ms 4984 KB Output is correct
4 Correct 2 ms 4956 KB Output is correct
5 Correct 2 ms 4956 KB Output is correct
6 Correct 2 ms 5164 KB Output is correct
7 Correct 2 ms 5168 KB Output is correct
8 Correct 2 ms 4956 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 2 ms 5164 KB Output is correct
11 Correct 3 ms 4956 KB Output is correct
12 Correct 2 ms 4956 KB Output is correct
13 Correct 2 ms 4956 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 2 ms 4956 KB Output is correct
16 Correct 2 ms 4956 KB Output is correct
17 Correct 2 ms 4956 KB Output is correct
18 Correct 2 ms 5164 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 2 ms 5172 KB Output is correct
21 Correct 2 ms 4952 KB Output is correct
22 Correct 3 ms 5208 KB Output is correct
23 Correct 3 ms 5212 KB Output is correct
24 Correct 2 ms 5212 KB Output is correct
25 Correct 2 ms 5212 KB Output is correct
26 Correct 2 ms 5212 KB Output is correct
27 Correct 2 ms 5176 KB Output is correct
28 Correct 3 ms 5224 KB Output is correct
29 Correct 2 ms 5212 KB Output is correct
30 Correct 3 ms 5212 KB Output is correct
31 Correct 2 ms 5212 KB Output is correct
32 Correct 2 ms 5212 KB Output is correct
33 Correct 2 ms 5212 KB Output is correct
34 Correct 2 ms 5240 KB Output is correct
35 Correct 2 ms 5212 KB Output is correct
36 Correct 2 ms 5212 KB Output is correct
37 Correct 3 ms 5212 KB Output is correct
38 Correct 2 ms 5212 KB Output is correct
39 Correct 2 ms 5212 KB Output is correct
40 Correct 3 ms 5212 KB Output is correct
41 Correct 2 ms 5288 KB Output is correct
42 Correct 2 ms 5212 KB Output is correct
43 Correct 3 ms 5212 KB Output is correct
44 Correct 3 ms 5208 KB Output is correct
45 Correct 3 ms 5212 KB Output is correct
46 Correct 2 ms 5212 KB Output is correct
47 Correct 2 ms 5212 KB Output is correct
48 Correct 2 ms 5212 KB Output is correct
49 Correct 3 ms 5212 KB Output is correct
50 Correct 2 ms 5212 KB Output is correct
51 Correct 3 ms 5064 KB Output is correct
52 Correct 2 ms 5212 KB Output is correct
53 Correct 2 ms 5212 KB Output is correct
54 Correct 3 ms 5212 KB Output is correct
55 Correct 3 ms 5212 KB Output is correct
56 Correct 2 ms 5212 KB Output is correct
57 Correct 3 ms 5248 KB Output is correct
58 Correct 3 ms 5208 KB Output is correct
59 Correct 2 ms 5212 KB Output is correct
60 Correct 3 ms 5212 KB Output is correct
61 Correct 2 ms 5212 KB Output is correct
62 Correct 2 ms 5248 KB Output is correct
63 Correct 2 ms 5212 KB Output is correct
64 Correct 65 ms 17596 KB Output is correct
65 Correct 58 ms 17520 KB Output is correct
66 Correct 57 ms 17544 KB Output is correct
67 Correct 60 ms 17560 KB Output is correct
68 Correct 59 ms 17536 KB Output is correct
69 Correct 56 ms 17556 KB Output is correct
70 Correct 67 ms 17572 KB Output is correct
71 Correct 64 ms 17564 KB Output is correct
72 Correct 63 ms 17536 KB Output is correct
73 Correct 66 ms 27540 KB Output is correct
74 Correct 67 ms 27540 KB Output is correct
75 Correct 54 ms 17556 KB Output is correct
76 Correct 58 ms 17564 KB Output is correct
77 Correct 56 ms 17552 KB Output is correct
78 Correct 57 ms 17556 KB Output is correct
79 Correct 78 ms 17552 KB Output is correct
80 Correct 68 ms 17500 KB Output is correct
81 Correct 48 ms 17868 KB Output is correct
82 Correct 54 ms 17748 KB Output is correct
83 Correct 77 ms 21652 KB Output is correct
84 Correct 69 ms 23460 KB Output is correct
85 Correct 81 ms 23080 KB Output is correct
86 Correct 77 ms 18580 KB Output is correct
87 Correct 60 ms 18064 KB Output is correct
88 Correct 58 ms 18636 KB Output is correct
89 Correct 64 ms 18592 KB Output is correct
90 Correct 60 ms 18412 KB Output is correct
91 Correct 58 ms 18804 KB Output is correct
92 Correct 57 ms 18880 KB Output is correct
93 Correct 79 ms 20764 KB Output is correct
94 Correct 54 ms 22220 KB Output is correct
95 Correct 71 ms 21232 KB Output is correct
96 Correct 71 ms 19676 KB Output is correct
97 Correct 78 ms 18408 KB Output is correct
98 Correct 54 ms 18116 KB Output is correct
99 Correct 54 ms 17804 KB Output is correct
100 Correct 60 ms 20600 KB Output is correct
101 Correct 53 ms 18964 KB Output is correct
102 Correct 58 ms 18276 KB Output is correct
103 Correct 56 ms 18100 KB Output is correct
104 Correct 40 ms 18320 KB Output is correct
105 Correct 66 ms 24976 KB Output is correct
106 Correct 38 ms 18384 KB Output is correct
107 Correct 39 ms 18380 KB Output is correct
108 Correct 62 ms 28308 KB Output is correct
109 Correct 41 ms 18368 KB Output is correct
110 Correct 71 ms 28568 KB Output is correct
111 Correct 50 ms 17572 KB Output is correct