oj.uz

Submission #773016

# Submission time Handle Problem Language Result Execution time Memory
773016 2023-07-04T14:04:54 Z davitmarg Power Plant (JOI20_power) C++17
47 / 100
 1439 ms 39504 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);

    srand(6969);
    int k = 2000;

    if(n > 5000)
        k = 37;

    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 7 ms 11988 KB Output is correct
5 Correct 6 ms 12068 KB Output is correct
6 Correct 7 ms 12072 KB Output is correct
7 Correct 6 ms 11964 KB Output is correct
8 Correct 6 ms 12076 KB Output is correct
9 Correct 6 ms 12000 KB Output is correct
10 Correct 6 ms 11988 KB Output is correct
11 Correct 8 ms 12072 KB Output is correct
12 Correct 8 ms 12064 KB Output is correct
13 Correct 9 ms 11988 KB Output is correct
14 Correct 7 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 6 ms 11988 KB Output is correct
18 Correct 7 ms 11988 KB Output is correct
19 Correct 7 ms 12056 KB Output is correct
20 Correct 7 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 7 ms 11988 KB Output is correct
5 Correct 6 ms 12068 KB Output is correct
6 Correct 7 ms 12072 KB Output is correct
7 Correct 6 ms 11964 KB Output is correct
8 Correct 6 ms 12076 KB Output is correct
9 Correct 6 ms 12000 KB Output is correct
10 Correct 6 ms 11988 KB Output is correct
11 Correct 8 ms 12072 KB Output is correct
12 Correct 8 ms 12064 KB Output is correct
13 Correct 9 ms 11988 KB Output is correct
14 Correct 7 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 6 ms 11988 KB Output is correct
18 Correct 7 ms 11988 KB Output is correct
19 Correct 7 ms 12056 KB Output is correct
20 Correct 7 ms 11988 KB Output is correct
21 Correct 8 ms 11988 KB Output is correct
22 Correct 69 ms 12168 KB Output is correct
23 Correct 72 ms 12164 KB Output is correct
24 Correct 51 ms 12176 KB Output is correct
25 Correct 62 ms 12172 KB Output is correct
26 Correct 51 ms 12092 KB Output is correct
27 Correct 48 ms 12132 KB Output is correct
28 Correct 50 ms 12148 KB Output is correct
29 Correct 66 ms 12352 KB Output is correct
30 Correct 74 ms 12340 KB Output is correct
31 Correct 69 ms 12080 KB Output is correct
32 Correct 47 ms 12068 KB Output is correct
33 Correct 52 ms 12116 KB Output is correct
34 Correct 51 ms 12084 KB Output is correct
35 Correct 52 ms 12116 KB Output is correct
36 Correct 53 ms 12116 KB Output is correct
37 Correct 43 ms 12092 KB Output is correct
38 Correct 46 ms 12116 KB Output is correct
39 Correct 71 ms 12256 KB Output is correct
40 Correct 59 ms 12244 KB Output is correct
41 Correct 59 ms 12252 KB Output is correct
42 Correct 53 ms 12208 KB Output is correct
43 Correct 54 ms 12116 KB Output is correct
44 Correct 49 ms 12216 KB Output is correct
45 Correct 50 ms 12208 KB Output is correct
46 Correct 51 ms 12188 KB Output is correct
47 Correct 49 ms 12176 KB Output is correct
48 Correct 48 ms 12244 KB Output is correct
49 Correct 50 ms 12244 KB Output is correct
50 Correct 50 ms 12244 KB Output is correct
51 Correct 49 ms 12216 KB Output is correct
52 Correct 48 ms 12124 KB Output is correct
53 Correct 53 ms 12236 KB Output is correct
54 Correct 51 ms 12116 KB Output is correct
55 Correct 49 ms 12188 KB Output is correct
56 Correct 35 ms 12084 KB Output is correct
57 Correct 71 ms 12344 KB Output is correct
58 Correct 35 ms 12116 KB Output is correct
59 Correct 35 ms 12116 KB Output is correct
60 Correct 67 ms 12244 KB Output is correct
61 Correct 36 ms 12116 KB Output is correct
62 Correct 68 ms 12332 KB Output is correct
63 Correct 44 ms 12080 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 7 ms 11988 KB Output is correct
5 Correct 6 ms 12068 KB Output is correct
6 Correct 7 ms 12072 KB Output is correct
7 Correct 6 ms 11964 KB Output is correct
8 Correct 6 ms 12076 KB Output is correct
9 Correct 6 ms 12000 KB Output is correct
10 Correct 6 ms 11988 KB Output is correct
11 Correct 8 ms 12072 KB Output is correct
12 Correct 8 ms 12064 KB Output is correct
13 Correct 9 ms 11988 KB Output is correct
14 Correct 7 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 6 ms 11988 KB Output is correct
18 Correct 7 ms 11988 KB Output is correct
19 Correct 7 ms 12056 KB Output is correct
20 Correct 7 ms 11988 KB Output is correct
21 Correct 8 ms 11988 KB Output is correct
22 Correct 69 ms 12168 KB Output is correct
23 Correct 72 ms 12164 KB Output is correct
24 Correct 51 ms 12176 KB Output is correct
25 Correct 62 ms 12172 KB Output is correct
26 Correct 51 ms 12092 KB Output is correct
27 Correct 48 ms 12132 KB Output is correct
28 Correct 50 ms 12148 KB Output is correct
29 Correct 66 ms 12352 KB Output is correct
30 Correct 74 ms 12340 KB Output is correct
31 Correct 69 ms 12080 KB Output is correct
32 Correct 47 ms 12068 KB Output is correct
33 Correct 52 ms 12116 KB Output is correct
34 Correct 51 ms 12084 KB Output is correct
35 Correct 52 ms 12116 KB Output is correct
36 Correct 53 ms 12116 KB Output is correct
37 Correct 43 ms 12092 KB Output is correct
38 Correct 46 ms 12116 KB Output is correct
39 Correct 71 ms 12256 KB Output is correct
40 Correct 59 ms 12244 KB Output is correct
41 Correct 59 ms 12252 KB Output is correct
42 Correct 53 ms 12208 KB Output is correct
43 Correct 54 ms 12116 KB Output is correct
44 Correct 49 ms 12216 KB Output is correct
45 Correct 50 ms 12208 KB Output is correct
46 Correct 51 ms 12188 KB Output is correct
47 Correct 49 ms 12176 KB Output is correct
48 Correct 48 ms 12244 KB Output is correct
49 Correct 50 ms 12244 KB Output is correct
50 Correct 50 ms 12244 KB Output is correct
51 Correct 49 ms 12216 KB Output is correct
52 Correct 48 ms 12124 KB Output is correct
53 Correct 53 ms 12236 KB Output is correct
54 Correct 51 ms 12116 KB Output is correct
55 Correct 49 ms 12188 KB Output is correct
56 Correct 35 ms 12084 KB Output is correct
57 Correct 71 ms 12344 KB Output is correct
58 Correct 35 ms 12116 KB Output is correct
59 Correct 35 ms 12116 KB Output is correct
60 Correct 67 ms 12244 KB Output is correct
61 Correct 36 ms 12116 KB Output is correct
62 Correct 68 ms 12332 KB Output is correct
63 Correct 44 ms 12080 KB Output is correct
64 Correct 592 ms 21240 KB Output is correct
65 Correct 611 ms 20804 KB Output is correct
66 Correct 670 ms 20916 KB Output is correct
67 Correct 746 ms 20584 KB Output is correct
68 Correct 576 ms 20172 KB Output is correct
69 Correct 586 ms 19792 KB Output is correct
70 Correct 640 ms 19812 KB Output is correct
71 Correct 585 ms 19816 KB Output is correct
72 Correct 666 ms 19780 KB Output is correct
73 Correct 1393 ms 39504 KB Output is correct
74 Correct 1439 ms 38656 KB Output is correct
75 Correct 639 ms 20852 KB Output is correct
76 Correct 569 ms 20376 KB Output is correct
77 Correct 581 ms 20664 KB Output is correct
78 Correct 591 ms 20552 KB Output is correct
79 Correct 575 ms 19920 KB Output is correct
80 Correct 624 ms 19652 KB Output is correct
81 Correct 456 ms 20804 KB Output is correct
82 Correct 624 ms 20268 KB Output is correct
83 Incorrect 967 ms 30184 KB Output isn't correct
84 Halted 0 ms 0 KB -