oj.uz

Submission #772995

# Submission time Handle Problem Language Result Execution time Memory
772995 2023-07-04T13:51:11 Z davitmarg Power Plant (JOI20_power) C++17
47 / 100
 1500 ms 20712 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);

    for(int i = 0; i < 400; 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 5 ms 11988 KB Output is correct
2 Correct 6 ms 12012 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 12060 KB Output is correct
6 Correct 6 ms 11988 KB Output is correct
7 Correct 6 ms 11988 KB Output is correct
8 Correct 7 ms 11980 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 5 ms 11988 KB Output is correct
13 Correct 5 ms 11988 KB Output is correct
14 Correct 6 ms 12024 KB Output is correct
15 Correct 6 ms 11988 KB Output is correct
16 Correct 5 ms 11988 KB Output is correct
17 Correct 7 ms 12036 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 11992 KB Output is correct
21 Correct 5 ms 11988 KB Output is correct

Subtask #2
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 11988 KB Output is correct
2 Correct 6 ms 12012 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 12060 KB Output is correct
6 Correct 6 ms 11988 KB Output is correct
7 Correct 6 ms 11988 KB Output is correct
8 Correct 7 ms 11980 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 5 ms 11988 KB Output is correct
13 Correct 5 ms 11988 KB Output is correct
14 Correct 6 ms 12024 KB Output is correct
15 Correct 6 ms 11988 KB Output is correct
16 Correct 5 ms 11988 KB Output is correct
17 Correct 7 ms 12036 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 11992 KB Output is correct
21 Correct 5 ms 11988 KB Output is correct
22 Correct 14 ms 12116 KB Output is correct
23 Correct 16 ms 12164 KB Output is correct
24 Correct 15 ms 12168 KB Output is correct
25 Correct 17 ms 12164 KB Output is correct
26 Correct 18 ms 12116 KB Output is correct
27 Correct 16 ms 12152 KB Output is correct
28 Correct 15 ms 12056 KB Output is correct
29 Correct 18 ms 12244 KB Output is correct
30 Correct 18 ms 12244 KB Output is correct
31 Correct 16 ms 12116 KB Output is correct
32 Correct 14 ms 12148 KB Output is correct
33 Correct 18 ms 12164 KB Output is correct
34 Correct 16 ms 12148 KB Output is correct
35 Correct 15 ms 12144 KB Output is correct
36 Correct 15 ms 12148 KB Output is correct
37 Correct 14 ms 12132 KB Output is correct
38 Correct 14 ms 12152 KB Output is correct
39 Correct 17 ms 12252 KB Output is correct
40 Correct 16 ms 12116 KB Output is correct
41 Correct 16 ms 12148 KB Output is correct
42 Correct 16 ms 12196 KB Output is correct
43 Correct 16 ms 12116 KB Output is correct
44 Correct 15 ms 12212 KB Output is correct
45 Correct 15 ms 12196 KB Output is correct
46 Correct 14 ms 12116 KB Output is correct
47 Correct 15 ms 12184 KB Output is correct
48 Correct 16 ms 12340 KB Output is correct
49 Correct 15 ms 12224 KB Output is correct
50 Correct 14 ms 12116 KB Output is correct
51 Correct 15 ms 12116 KB Output is correct
52 Correct 15 ms 12124 KB Output is correct
53 Correct 18 ms 12144 KB Output is correct
54 Correct 14 ms 12116 KB Output is correct
55 Correct 14 ms 12116 KB Output is correct
56 Correct 12 ms 12120 KB Output is correct
57 Correct 18 ms 12328 KB Output is correct
58 Correct 12 ms 12116 KB Output is correct
59 Correct 11 ms 12172 KB Output is correct
60 Correct 18 ms 12284 KB Output is correct
61 Correct 12 ms 12156 KB Output is correct
62 Correct 18 ms 12244 KB Output is correct
63 Correct 14 ms 12116 KB Output is correct

Subtask #3
0.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 11988 KB Output is correct
2 Correct 6 ms 12012 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 12060 KB Output is correct
6 Correct 6 ms 11988 KB Output is correct
7 Correct 6 ms 11988 KB Output is correct
8 Correct 7 ms 11980 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 5 ms 11988 KB Output is correct
13 Correct 5 ms 11988 KB Output is correct
14 Correct 6 ms 12024 KB Output is correct
15 Correct 6 ms 11988 KB Output is correct
16 Correct 5 ms 11988 KB Output is correct
17 Correct 7 ms 12036 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 11992 KB Output is correct
21 Correct 5 ms 11988 KB Output is correct
22 Correct 14 ms 12116 KB Output is correct
23 Correct 16 ms 12164 KB Output is correct
24 Correct 15 ms 12168 KB Output is correct
25 Correct 17 ms 12164 KB Output is correct
26 Correct 18 ms 12116 KB Output is correct
27 Correct 16 ms 12152 KB Output is correct
28 Correct 15 ms 12056 KB Output is correct
29 Correct 18 ms 12244 KB Output is correct
30 Correct 18 ms 12244 KB Output is correct
31 Correct 16 ms 12116 KB Output is correct
32 Correct 14 ms 12148 KB Output is correct
33 Correct 18 ms 12164 KB Output is correct
34 Correct 16 ms 12148 KB Output is correct
35 Correct 15 ms 12144 KB Output is correct
36 Correct 15 ms 12148 KB Output is correct
37 Correct 14 ms 12132 KB Output is correct
38 Correct 14 ms 12152 KB Output is correct
39 Correct 17 ms 12252 KB Output is correct
40 Correct 16 ms 12116 KB Output is correct
41 Correct 16 ms 12148 KB Output is correct
42 Correct 16 ms 12196 KB Output is correct
43 Correct 16 ms 12116 KB Output is correct
44 Correct 15 ms 12212 KB Output is correct
45 Correct 15 ms 12196 KB Output is correct
46 Correct 14 ms 12116 KB Output is correct
47 Correct 15 ms 12184 KB Output is correct
48 Correct 16 ms 12340 KB Output is correct
49 Correct 15 ms 12224 KB Output is correct
50 Correct 14 ms 12116 KB Output is correct
51 Correct 15 ms 12116 KB Output is correct
52 Correct 15 ms 12124 KB Output is correct
53 Correct 18 ms 12144 KB Output is correct
54 Correct 14 ms 12116 KB Output is correct
55 Correct 14 ms 12116 KB Output is correct
56 Correct 12 ms 12120 KB Output is correct
57 Correct 18 ms 12328 KB Output is correct
58 Correct 12 ms 12116 KB Output is correct
59 Correct 11 ms 12172 KB Output is correct
60 Correct 18 ms 12284 KB Output is correct
61 Correct 12 ms 12156 KB Output is correct
62 Correct 18 ms 12244 KB Output is correct
63 Correct 14 ms 12116 KB Output is correct
64 Execution timed out 1562 ms 20712 KB Time limit exceeded
65 Halted 0 ms 0 KB -