oj.uz

Submission #773038

# Submission time Handle Problem Language Result Execution time Memory
773038 2023-07-04T14:14:29 Z davitmarg Power Plant (JOI20_power) C++17
47 / 100
 1500 ms 39312 KB 
/*
DavitMarg
In pr honky-tonk,
Down in Mexico
*/
#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <algorithm>
#include <cmath>
#include <vector>
#include <string>
#include <cstring>
#include <map>
#include <unordered_map>
#include <set>
#include <unordered_set>
#include <queue>
#include <bitset>
#include <stack>
#include <cassert>
#include <iterator>
#include <random>
#include <chrono>
#define mod 1000000007ll
#define LL long long
#define LD long double
#define MP make_pair    
#define PB push_back
#define all(v) v.begin(), v.end()
#define fastIO ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
using namespace std;

const int N = 500005;

int n;
string s;
vector<int> g[N];
int dp[N];

int dfs(int v, int p, bool start = false)
{
    dp[v] = s[v] - '0';
    int sum = 0;
    int mx = 0;
    for(int i = 0; i < g[v].size(); i++)
    {
        int to = g[v][i];
        if(to == p)
            continue;
        sum += dfs(to, v);
        mx = max(dp[to], mx);
    }
    dp[v] = max(dp[v], sum - (s[v] - '0'));
    if(start)
        dp[v] = max(dp[v], (s[v] - '0') + mx);
    return dp[v];
}

LL myRand()
{
    return ((LL)rand() << 16) + rand();
}

void solve()
{
    cin >> n;
    for(int i = 1; i <= n - 1; i++)
    {
        int a, b;
        cin >> a >> b;
        g[a].PB(b);
        g[b].PB(a);
    }
    cin>>s;
    s = '#' + s;
    int ans = 0;

    vector<int> p;
    for(int i = 1; i <= n; i++)
    {
        if(s[i] == '1')
            p.PB(i);
        if(g[i].size() == 1)
        {
            p.PB(i);
            p.PB(i);
            p.PB(i);
            p.PB(i);
            p.PB(i);
            p.PB(i);
            p.PB(i);
            p.PB(i);
        }
    }

    srand(69);
    int k = 2000;

    if(n > 5000)
        k = 39;

    for(int i = 0; i < k; i++)
    {
        int v = p[myRand() % p.size()];
        ans = max(ans, dfs(v, -1, true));
    }
    cout<<ans<<endl;
}

int main()
{
    fastIO;
    int T = 1;
    //cin >> T;
    while (T--)
    {
        solve();
    }

    return 0;
}

/*


cd /mnt/d/Davit/Projects/VSCode; g++ -std=c++17 -O2 -Wall -Wextra -Ddeath -Wshadow source.cpp -o orz; ./orz; rm orz

*/

Compilation message

power.cpp: In function 'int dfs(int, int, bool)':
power.cpp:45:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |     for(int i = 0; i < g[v].size(); i++)
      |                    ~~^~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11988 KB Output is correct
2 Correct 7 ms 11988 KB Output is correct
3 Correct 6 ms 11988 KB Output is correct
4 Correct 6 ms 12036 KB Output is correct
5 Correct 6 ms 11988 KB Output is correct
6 Correct 5 ms 11988 KB Output is correct
7 Correct 6 ms 11988 KB Output is correct
8 Correct 7 ms 11988 KB Output is correct
9 Correct 6 ms 11988 KB Output is correct
10 Correct 6 ms 11988 KB Output is correct
11 Correct 6 ms 11988 KB Output is correct
12 Correct 7 ms 11988 KB Output is correct
13 Correct 6 ms 12036 KB Output is correct
14 Correct 6 ms 11988 KB Output is correct
15 Correct 6 ms 11988 KB Output is correct
16 Correct 6 ms 11988 KB Output is correct
17 Correct 7 ms 11988 KB Output is correct
18 Correct 6 ms 11988 KB Output is correct
19 Correct 6 ms 11948 KB Output is correct
20 Correct 6 ms 11988 KB Output is correct
21 Correct 8 ms 11988 KB Output is correct

Subtask #2
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11988 KB Output is correct
2 Correct 7 ms 11988 KB Output is correct
3 Correct 6 ms 11988 KB Output is correct
4 Correct 6 ms 12036 KB Output is correct
5 Correct 6 ms 11988 KB Output is correct
6 Correct 5 ms 11988 KB Output is correct
7 Correct 6 ms 11988 KB Output is correct
8 Correct 7 ms 11988 KB Output is correct
9 Correct 6 ms 11988 KB Output is correct
10 Correct 6 ms 11988 KB Output is correct
11 Correct 6 ms 11988 KB Output is correct
12 Correct 7 ms 11988 KB Output is correct
13 Correct 6 ms 12036 KB Output is correct
14 Correct 6 ms 11988 KB Output is correct
15 Correct 6 ms 11988 KB Output is correct
16 Correct 6 ms 11988 KB Output is correct
17 Correct 7 ms 11988 KB Output is correct
18 Correct 6 ms 11988 KB Output is correct
19 Correct 6 ms 11948 KB Output is correct
20 Correct 6 ms 11988 KB Output is correct
21 Correct 8 ms 11988 KB Output is correct
22 Correct 49 ms 12244 KB Output is correct
23 Correct 50 ms 12244 KB Output is correct
24 Correct 50 ms 12200 KB Output is correct
25 Correct 61 ms 12200 KB Output is correct
26 Correct 51 ms 12208 KB Output is correct
27 Correct 48 ms 12116 KB Output is correct
28 Correct 51 ms 12116 KB Output is correct
29 Correct 79 ms 12320 KB Output is correct
30 Correct 63 ms 12244 KB Output is correct
31 Correct 46 ms 12244 KB Output is correct
32 Correct 45 ms 12244 KB Output is correct
33 Correct 50 ms 12192 KB Output is correct
34 Correct 51 ms 12180 KB Output is correct
35 Correct 56 ms 12176 KB Output is correct
36 Correct 51 ms 12176 KB Output is correct
37 Correct 43 ms 12244 KB Output is correct
38 Correct 44 ms 12244 KB Output is correct
39 Correct 61 ms 12280 KB Output is correct
40 Correct 58 ms 12264 KB Output is correct
41 Correct 59 ms 12276 KB Output is correct
42 Correct 53 ms 12244 KB Output is correct
43 Correct 53 ms 12228 KB Output is correct
44 Correct 53 ms 12276 KB Output is correct
45 Correct 49 ms 12244 KB Output is correct
46 Correct 49 ms 12244 KB Output is correct
47 Correct 59 ms 12244 KB Output is correct
48 Correct 49 ms 12244 KB Output is correct
49 Correct 49 ms 12328 KB Output is correct
50 Correct 55 ms 12300 KB Output is correct
51 Correct 49 ms 12244 KB Output is correct
52 Correct 51 ms 12244 KB Output is correct
53 Correct 47 ms 12244 KB Output is correct
54 Correct 49 ms 12244 KB Output is correct
55 Correct 48 ms 12256 KB Output is correct
56 Correct 35 ms 12244 KB Output is correct
57 Correct 76 ms 12324 KB Output is correct
58 Correct 35 ms 12244 KB Output is correct
59 Correct 35 ms 12244 KB Output is correct
60 Correct 65 ms 12244 KB Output is correct
61 Correct 34 ms 12244 KB Output is correct
62 Correct 66 ms 12308 KB Output is correct
63 Correct 44 ms 12248 KB Output is correct

Subtask #3
0.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11988 KB Output is correct
2 Correct 7 ms 11988 KB Output is correct
3 Correct 6 ms 11988 KB Output is correct
4 Correct 6 ms 12036 KB Output is correct
5 Correct 6 ms 11988 KB Output is correct
6 Correct 5 ms 11988 KB Output is correct
7 Correct 6 ms 11988 KB Output is correct
8 Correct 7 ms 11988 KB Output is correct
9 Correct 6 ms 11988 KB Output is correct
10 Correct 6 ms 11988 KB Output is correct
11 Correct 6 ms 11988 KB Output is correct
12 Correct 7 ms 11988 KB Output is correct
13 Correct 6 ms 12036 KB Output is correct
14 Correct 6 ms 11988 KB Output is correct
15 Correct 6 ms 11988 KB Output is correct
16 Correct 6 ms 11988 KB Output is correct
17 Correct 7 ms 11988 KB Output is correct
18 Correct 6 ms 11988 KB Output is correct
19 Correct 6 ms 11948 KB Output is correct
20 Correct 6 ms 11988 KB Output is correct
21 Correct 8 ms 11988 KB Output is correct
22 Correct 49 ms 12244 KB Output is correct
23 Correct 50 ms 12244 KB Output is correct
24 Correct 50 ms 12200 KB Output is correct
25 Correct 61 ms 12200 KB Output is correct
26 Correct 51 ms 12208 KB Output is correct
27 Correct 48 ms 12116 KB Output is correct
28 Correct 51 ms 12116 KB Output is correct
29 Correct 79 ms 12320 KB Output is correct
30 Correct 63 ms 12244 KB Output is correct
31 Correct 46 ms 12244 KB Output is correct
32 Correct 45 ms 12244 KB Output is correct
33 Correct 50 ms 12192 KB Output is correct
34 Correct 51 ms 12180 KB Output is correct
35 Correct 56 ms 12176 KB Output is correct
36 Correct 51 ms 12176 KB Output is correct
37 Correct 43 ms 12244 KB Output is correct
38 Correct 44 ms 12244 KB Output is correct
39 Correct 61 ms 12280 KB Output is correct
40 Correct 58 ms 12264 KB Output is correct
41 Correct 59 ms 12276 KB Output is correct
42 Correct 53 ms 12244 KB Output is correct
43 Correct 53 ms 12228 KB Output is correct
44 Correct 53 ms 12276 KB Output is correct
45 Correct 49 ms 12244 KB Output is correct
46 Correct 49 ms 12244 KB Output is correct
47 Correct 59 ms 12244 KB Output is correct
48 Correct 49 ms 12244 KB Output is correct
49 Correct 49 ms 12328 KB Output is correct
50 Correct 55 ms 12300 KB Output is correct
51 Correct 49 ms 12244 KB Output is correct
52 Correct 51 ms 12244 KB Output is correct
53 Correct 47 ms 12244 KB Output is correct
54 Correct 49 ms 12244 KB Output is correct
55 Correct 48 ms 12256 KB Output is correct
56 Correct 35 ms 12244 KB Output is correct
57 Correct 76 ms 12324 KB Output is correct
58 Correct 35 ms 12244 KB Output is correct
59 Correct 35 ms 12244 KB Output is correct
60 Correct 65 ms 12244 KB Output is correct
61 Correct 34 ms 12244 KB Output is correct
62 Correct 66 ms 12308 KB Output is correct
63 Correct 44 ms 12248 KB Output is correct
64 Correct 583 ms 23352 KB Output is correct
65 Correct 647 ms 23208 KB Output is correct
66 Correct 612 ms 23184 KB Output is correct
67 Correct 630 ms 23232 KB Output is correct
68 Correct 638 ms 23252 KB Output is correct
69 Correct 579 ms 23224 KB Output is correct
70 Correct 567 ms 23208 KB Output is correct
71 Correct 549 ms 23244 KB Output is correct
72 Correct 619 ms 23240 KB Output is correct
73 Execution timed out 1531 ms 39312 KB Time limit exceeded
74 Halted 0 ms 0 KB -