oj.uz

Submission #773012

# Submission time Handle Problem Language Result Execution time Memory
773012 2023-07-04T14:04:17 Z davitmarg Power Plant (JOI20_power) C++17
47 / 100
 1244 ms 39260 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 = 35;

    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 11956 KB Output is correct
2 Correct 7 ms 11992 KB Output is correct
3 Correct 6 ms 11988 KB Output is correct
4 Correct 6 ms 11988 KB Output is correct
5 Correct 6 ms 11988 KB Output is correct
6 Correct 6 ms 11988 KB Output is correct
7 Correct 7 ms 11988 KB Output is correct
8 Correct 6 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 12016 KB Output is correct
14 Correct 6 ms 11988 KB Output is correct
15 Correct 6 ms 11992 KB Output is correct
16 Correct 6 ms 11988 KB Output is correct
17 Correct 6 ms 11988 KB Output is correct
18 Correct 6 ms 11988 KB Output is correct
19 Correct 6 ms 11988 KB Output is correct
20 Correct 6 ms 11988 KB Output is correct
21 Correct 6 ms 11988 KB Output is correct

Subtask #2
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11956 KB Output is correct
2 Correct 7 ms 11992 KB Output is correct
3 Correct 6 ms 11988 KB Output is correct
4 Correct 6 ms 11988 KB Output is correct
5 Correct 6 ms 11988 KB Output is correct
6 Correct 6 ms 11988 KB Output is correct
7 Correct 7 ms 11988 KB Output is correct
8 Correct 6 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 12016 KB Output is correct
14 Correct 6 ms 11988 KB Output is correct
15 Correct 6 ms 11992 KB Output is correct
16 Correct 6 ms 11988 KB Output is correct
17 Correct 6 ms 11988 KB Output is correct
18 Correct 6 ms 11988 KB Output is correct
19 Correct 6 ms 11988 KB Output is correct
20 Correct 6 ms 11988 KB Output is correct
21 Correct 6 ms 11988 KB Output is correct
22 Correct 48 ms 12116 KB Output is correct
23 Correct 56 ms 12144 KB Output is correct
24 Correct 50 ms 12168 KB Output is correct
25 Correct 57 ms 12140 KB Output is correct
26 Correct 51 ms 12136 KB Output is correct
27 Correct 49 ms 12116 KB Output is correct
28 Correct 51 ms 12132 KB Output is correct
29 Correct 70 ms 12244 KB Output is correct
30 Correct 72 ms 12364 KB Output is correct
31 Correct 46 ms 12116 KB Output is correct
32 Correct 46 ms 12116 KB Output is correct
33 Correct 51 ms 12116 KB Output is correct
34 Correct 52 ms 12132 KB Output is correct
35 Correct 54 ms 12116 KB Output is correct
36 Correct 54 ms 12124 KB Output is correct
37 Correct 52 ms 12096 KB Output is correct
38 Correct 46 ms 12116 KB Output is correct
39 Correct 58 ms 12244 KB Output is correct
40 Correct 57 ms 12244 KB Output is correct
41 Correct 57 ms 12116 KB Output is correct
42 Correct 54 ms 12196 KB Output is correct
43 Correct 55 ms 12116 KB Output is correct
44 Correct 50 ms 12116 KB Output is correct
45 Correct 53 ms 12180 KB Output is correct
46 Correct 49 ms 12116 KB Output is correct
47 Correct 51 ms 12116 KB Output is correct
48 Correct 50 ms 12244 KB Output is correct
49 Correct 59 ms 12244 KB Output is correct
50 Correct 50 ms 12204 KB Output is correct
51 Correct 58 ms 12188 KB Output is correct
52 Correct 47 ms 12164 KB Output is correct
53 Correct 47 ms 12116 KB Output is correct
54 Correct 49 ms 12116 KB Output is correct
55 Correct 55 ms 12164 KB Output is correct
56 Correct 35 ms 12116 KB Output is correct
57 Correct 68 ms 12308 KB Output is correct
58 Correct 34 ms 12172 KB Output is correct
59 Correct 34 ms 12116 KB Output is correct
60 Correct 65 ms 12308 KB Output is correct
61 Correct 35 ms 12116 KB Output is correct
62 Correct 71 ms 12320 KB Output is correct
63 Correct 45 ms 12116 KB Output is correct

Subtask #3
0.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11956 KB Output is correct
2 Correct 7 ms 11992 KB Output is correct
3 Correct 6 ms 11988 KB Output is correct
4 Correct 6 ms 11988 KB Output is correct
5 Correct 6 ms 11988 KB Output is correct
6 Correct 6 ms 11988 KB Output is correct
7 Correct 7 ms 11988 KB Output is correct
8 Correct 6 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 12016 KB Output is correct
14 Correct 6 ms 11988 KB Output is correct
15 Correct 6 ms 11992 KB Output is correct
16 Correct 6 ms 11988 KB Output is correct
17 Correct 6 ms 11988 KB Output is correct
18 Correct 6 ms 11988 KB Output is correct
19 Correct 6 ms 11988 KB Output is correct
20 Correct 6 ms 11988 KB Output is correct
21 Correct 6 ms 11988 KB Output is correct
22 Correct 48 ms 12116 KB Output is correct
23 Correct 56 ms 12144 KB Output is correct
24 Correct 50 ms 12168 KB Output is correct
25 Correct 57 ms 12140 KB Output is correct
26 Correct 51 ms 12136 KB Output is correct
27 Correct 49 ms 12116 KB Output is correct
28 Correct 51 ms 12132 KB Output is correct
29 Correct 70 ms 12244 KB Output is correct
30 Correct 72 ms 12364 KB Output is correct
31 Correct 46 ms 12116 KB Output is correct
32 Correct 46 ms 12116 KB Output is correct
33 Correct 51 ms 12116 KB Output is correct
34 Correct 52 ms 12132 KB Output is correct
35 Correct 54 ms 12116 KB Output is correct
36 Correct 54 ms 12124 KB Output is correct
37 Correct 52 ms 12096 KB Output is correct
38 Correct 46 ms 12116 KB Output is correct
39 Correct 58 ms 12244 KB Output is correct
40 Correct 57 ms 12244 KB Output is correct
41 Correct 57 ms 12116 KB Output is correct
42 Correct 54 ms 12196 KB Output is correct
43 Correct 55 ms 12116 KB Output is correct
44 Correct 50 ms 12116 KB Output is correct
45 Correct 53 ms 12180 KB Output is correct
46 Correct 49 ms 12116 KB Output is correct
47 Correct 51 ms 12116 KB Output is correct
48 Correct 50 ms 12244 KB Output is correct
49 Correct 59 ms 12244 KB Output is correct
50 Correct 50 ms 12204 KB Output is correct
51 Correct 58 ms 12188 KB Output is correct
52 Correct 47 ms 12164 KB Output is correct
53 Correct 47 ms 12116 KB Output is correct
54 Correct 49 ms 12116 KB Output is correct
55 Correct 55 ms 12164 KB Output is correct
56 Correct 35 ms 12116 KB Output is correct
57 Correct 68 ms 12308 KB Output is correct
58 Correct 34 ms 12172 KB Output is correct
59 Correct 34 ms 12116 KB Output is correct
60 Correct 65 ms 12308 KB Output is correct
61 Correct 35 ms 12116 KB Output is correct
62 Correct 71 ms 12320 KB Output is correct
63 Correct 45 ms 12116 KB Output is correct
64 Correct 497 ms 20680 KB Output is correct
65 Correct 543 ms 20652 KB Output is correct
66 Correct 605 ms 20540 KB Output is correct
67 Correct 635 ms 20348 KB Output is correct
68 Correct 536 ms 19880 KB Output is correct
69 Correct 571 ms 19640 KB Output is correct
70 Correct 598 ms 19648 KB Output is correct
71 Correct 628 ms 19440 KB Output is correct
72 Correct 567 ms 19568 KB Output is correct
73 Correct 1244 ms 39260 KB Output is correct
74 Correct 1212 ms 38396 KB Output is correct
75 Correct 640 ms 20608 KB Output is correct
76 Correct 491 ms 20196 KB Output is correct
77 Correct 541 ms 20412 KB Output is correct
78 Correct 757 ms 20212 KB Output is correct
79 Correct 886 ms 19756 KB Output is correct
80 Correct 909 ms 19436 KB Output is correct
81 Correct 478 ms 20428 KB Output is correct
82 Correct 553 ms 20184 KB Output is correct
83 Incorrect 1000 ms 30064 KB Output isn't correct
84 Halted 0 ms 0 KB -