oj.uz

Submission #955833

# Submission time Handle Problem Language Result Execution time Memory
955833 2024-03-31T14:05:15 Z vjudge1 Power Plant (JOI20_power) C++17
100 / 100
 107 ms 26268 KB 
#include <bits/stdc++.h>
#define gsn "Power Plant"
#define ll long long
#define pii pair<int, int>
#define gb(i, j) ((i >> j) & 1)
#define fi(i, a, b) for(int i = a; i <= b; i++)
#define fid(i, a, b) for(int i = a; i >= b; i--)

using namespace std;

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

const int maxn = 200005;

int n, ans;
int dp[maxn];
string s;
vector<int> o[maxn];

void dfs(int u, int par)
{
    int sum = 0, mx = 0;
    for(int v : o[u])
    {
        if(v == par) continue;
        dfs(v, u);

        sum += dp[v], mx = max(mx, dp[v]);
    }

    ans = max({ ans, sum - (s[u] == '1'), mx + (s[u] == '1') });
    dp[u] = max({ (int)(s[u] == '1'), sum - (s[u] == '1'), mx - (s[u] == '1') });
}

void solve()
{
    cin >> n;
    fi(i, 1, n - 1)
    {
        int u, v;
        cin >> u >> v;

        o[u].push_back(v);
        o[v].push_back(u);
    }

    cin >> s, s = ' ' + s;

    dfs(1, -1);

    cout << ans ;
}


int main()
{
    if(fopen(gsn".inp", "r"))
    {
        freopen(gsn".inp", "r", stdin);
        freopen(gsn".out", "w", stdout);
    }

    ios_base::sync_with_stdio(0);
    cin.tie(NULL);
    cout.tie(NULL);

    int nTest = 1;
//    cin >> nTest;

    while(nTest --)
    {
        solve();
    }




    /// ------------------check time!-----------------///
    cerr << "\n" << "\nTime elapsed: " << 1000 * clock() / CLOCKS_PER_SEC << "ms\n";
    return 0;
}

Compilation message

power.cpp: In function 'int main()':
power.cpp:63:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   63 |         freopen(gsn".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
power.cpp:64:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |         freopen(gsn".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4952 KB Output is correct
2 Correct 1 ms 4956 KB Output is correct
3 Correct 1 ms 4956 KB Output is correct
4 Correct 1 ms 5132 KB Output is correct
5 Correct 1 ms 4956 KB Output is correct
6 Correct 1 ms 4956 KB Output is correct
7 Correct 2 ms 4956 KB Output is correct
8 Correct 1 ms 4956 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 1 ms 4956 KB Output is correct
11 Correct 2 ms 4956 KB Output is correct
12 Correct 2 ms 4952 KB Output is correct
13 Correct 1 ms 4956 KB Output is correct
14 Correct 1 ms 4956 KB Output is correct
15 Correct 1 ms 4956 KB Output is correct
16 Correct 1 ms 4956 KB Output is correct
17 Correct 1 ms 4956 KB Output is correct
18 Correct 2 ms 4968 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 1 ms 4956 KB Output is correct
21 Correct 1 ms 4956 KB Output is correct

Subtask #2
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4952 KB Output is correct
2 Correct 1 ms 4956 KB Output is correct
3 Correct 1 ms 4956 KB Output is correct
4 Correct 1 ms 5132 KB Output is correct
5 Correct 1 ms 4956 KB Output is correct
6 Correct 1 ms 4956 KB Output is correct
7 Correct 2 ms 4956 KB Output is correct
8 Correct 1 ms 4956 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 1 ms 4956 KB Output is correct
11 Correct 2 ms 4956 KB Output is correct
12 Correct 2 ms 4952 KB Output is correct
13 Correct 1 ms 4956 KB Output is correct
14 Correct 1 ms 4956 KB Output is correct
15 Correct 1 ms 4956 KB Output is correct
16 Correct 1 ms 4956 KB Output is correct
17 Correct 1 ms 4956 KB Output is correct
18 Correct 2 ms 4968 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 1 ms 4956 KB Output is correct
21 Correct 1 ms 4956 KB Output is correct
22 Correct 2 ms 5212 KB Output is correct
23 Correct 2 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 5212 KB Output is correct
28 Correct 2 ms 5212 KB Output is correct
29 Correct 2 ms 5212 KB Output is correct
30 Correct 2 ms 5212 KB Output is correct
31 Correct 2 ms 5208 KB Output is correct
32 Correct 2 ms 5044 KB Output is correct
33 Correct 2 ms 5212 KB Output is correct
34 Correct 2 ms 5212 KB Output is correct
35 Correct 2 ms 5220 KB Output is correct
36 Correct 2 ms 5212 KB Output is correct
37 Correct 2 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 2 ms 5212 KB Output is correct
41 Correct 2 ms 5212 KB Output is correct
42 Correct 2 ms 5212 KB Output is correct
43 Correct 2 ms 5212 KB Output is correct
44 Correct 3 ms 5212 KB Output is correct
45 Correct 2 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 5464 KB Output is correct
49 Correct 2 ms 5212 KB Output is correct
50 Correct 2 ms 5212 KB Output is correct
51 Correct 2 ms 5212 KB Output is correct
52 Correct 2 ms 5212 KB Output is correct
53 Correct 2 ms 5212 KB Output is correct
54 Correct 2 ms 5212 KB Output is correct
55 Correct 2 ms 5212 KB Output is correct
56 Correct 2 ms 5212 KB Output is correct
57 Correct 2 ms 5212 KB Output is correct
58 Correct 2 ms 5212 KB Output is correct
59 Correct 3 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 5464 KB Output is correct
63 Correct 3 ms 5208 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4952 KB Output is correct
2 Correct 1 ms 4956 KB Output is correct
3 Correct 1 ms 4956 KB Output is correct
4 Correct 1 ms 5132 KB Output is correct
5 Correct 1 ms 4956 KB Output is correct
6 Correct 1 ms 4956 KB Output is correct
7 Correct 2 ms 4956 KB Output is correct
8 Correct 1 ms 4956 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 1 ms 4956 KB Output is correct
11 Correct 2 ms 4956 KB Output is correct
12 Correct 2 ms 4952 KB Output is correct
13 Correct 1 ms 4956 KB Output is correct
14 Correct 1 ms 4956 KB Output is correct
15 Correct 1 ms 4956 KB Output is correct
16 Correct 1 ms 4956 KB Output is correct
17 Correct 1 ms 4956 KB Output is correct
18 Correct 2 ms 4968 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 1 ms 4956 KB Output is correct
21 Correct 1 ms 4956 KB Output is correct
22 Correct 2 ms 5212 KB Output is correct
23 Correct 2 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 5212 KB Output is correct
28 Correct 2 ms 5212 KB Output is correct
29 Correct 2 ms 5212 KB Output is correct
30 Correct 2 ms 5212 KB Output is correct
31 Correct 2 ms 5208 KB Output is correct
32 Correct 2 ms 5044 KB Output is correct
33 Correct 2 ms 5212 KB Output is correct
34 Correct 2 ms 5212 KB Output is correct
35 Correct 2 ms 5220 KB Output is correct
36 Correct 2 ms 5212 KB Output is correct
37 Correct 2 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 2 ms 5212 KB Output is correct
41 Correct 2 ms 5212 KB Output is correct
42 Correct 2 ms 5212 KB Output is correct
43 Correct 2 ms 5212 KB Output is correct
44 Correct 3 ms 5212 KB Output is correct
45 Correct 2 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 5464 KB Output is correct
49 Correct 2 ms 5212 KB Output is correct
50 Correct 2 ms 5212 KB Output is correct
51 Correct 2 ms 5212 KB Output is correct
52 Correct 2 ms 5212 KB Output is correct
53 Correct 2 ms 5212 KB Output is correct
54 Correct 2 ms 5212 KB Output is correct
55 Correct 2 ms 5212 KB Output is correct
56 Correct 2 ms 5212 KB Output is correct
57 Correct 2 ms 5212 KB Output is correct
58 Correct 2 ms 5212 KB Output is correct
59 Correct 3 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 5464 KB Output is correct
63 Correct 3 ms 5208 KB Output is correct
64 Correct 62 ms 12500 KB Output is correct
65 Correct 61 ms 12496 KB Output is correct
66 Correct 82 ms 12880 KB Output is correct
67 Correct 90 ms 12436 KB Output is correct
68 Correct 59 ms 12476 KB Output is correct
69 Correct 65 ms 12876 KB Output is correct
70 Correct 78 ms 12760 KB Output is correct
71 Correct 63 ms 12508 KB Output is correct
72 Correct 62 ms 12492 KB Output is correct
73 Correct 82 ms 25032 KB Output is correct
74 Correct 107 ms 25040 KB Output is correct
75 Correct 66 ms 12476 KB Output is correct
76 Correct 62 ms 12500 KB Output is correct
77 Correct 61 ms 12512 KB Output is correct
78 Correct 65 ms 12456 KB Output is correct
79 Correct 61 ms 12516 KB Output is correct
80 Correct 93 ms 12492 KB Output is correct
81 Correct 61 ms 12900 KB Output is correct
82 Correct 58 ms 12748 KB Output is correct
83 Correct 97 ms 17480 KB Output is correct
84 Correct 74 ms 19728 KB Output is correct
85 Correct 74 ms 19424 KB Output is correct
86 Correct 99 ms 14192 KB Output is correct
87 Correct 61 ms 13260 KB Output is correct
88 Correct 66 ms 13844 KB Output is correct
89 Correct 94 ms 13788 KB Output is correct
90 Correct 88 ms 13484 KB Output is correct
91 Correct 92 ms 13804 KB Output is correct
92 Correct 64 ms 14128 KB Output is correct
93 Correct 66 ms 16544 KB Output is correct
94 Correct 67 ms 18376 KB Output is correct
95 Correct 65 ms 16772 KB Output is correct
96 Correct 91 ms 15152 KB Output is correct
97 Correct 70 ms 13500 KB Output is correct
98 Correct 62 ms 13056 KB Output is correct
99 Correct 65 ms 12748 KB Output is correct
100 Correct 66 ms 16140 KB Output is correct
101 Correct 88 ms 14148 KB Output is correct
102 Correct 57 ms 13216 KB Output is correct
103 Correct 83 ms 13080 KB Output is correct
104 Correct 45 ms 13248 KB Output is correct
105 Correct 102 ms 21860 KB Output is correct
106 Correct 64 ms 13776 KB Output is correct
107 Correct 73 ms 13404 KB Output is correct
108 Correct 96 ms 25836 KB Output is correct
109 Correct 46 ms 13364 KB Output is correct
110 Correct 83 ms 26268 KB Output is correct
111 Correct 83 ms 12508 KB Output is correct