oj.uz

Submission #925050

# Submission time Handle Problem Language Result Execution time Memory
925050 2024-02-10T14:08:47 Z boris_mihov Power Plant (JOI20_power) C++17
100 / 100
 153 ms 28612 KB 
#include <algorithm>
#include <iostream>
#include <numeric>
#include <cassert>
#include <cstring>
#include <vector>
#include <queue>
#include <stack>
#include <set>

typedef long long llong;
const int MAXN = 2e5 + 10;
const int INF  = 2e9;

int n;
int a[MAXN];
int b[MAXN];
int sz[MAXN];
char s[MAXN];
int dp[MAXN][2];
bool bl[MAXN][2];
std::vector <int> g[MAXN];

void buildDFS(int node, int par)
{
    for (int &u : g[node])
    {
        if (u == par)
        {
            std::swap(u, g[node].back());
            g[node].pop_back();
            break;
        }
    }

    sz[node] = s[node] - '0';
    for (const int &u : g[node])
    {
        buildDFS(u, node);
        sz[node] += sz[u];
    }
}

int f(int node, bool parentHas)
{
    if (bl[node][parentHas])
    {
        return dp[node][parentHas];
    }

    bl[node][parentHas] = true;
    dp[node][parentHas] = std::max(dp[node][parentHas], (int)(s[node] == '1'));

    if (!parentHas && s[node] == '1')
    {
        for (const int &u : g[node])
        {
            dp[node][parentHas] = std::max(dp[node][parentHas], f(u, true) + 1);
        }
    }

    if (!parentHas)
    {
        for (const int &u : g[node])
        {
            dp[node][parentHas] = std::max(dp[node][parentHas], f(u, false));
        }
    }

    int curr = 0;
    for (const int &u : g[node])
    {
        curr += f(u, true);    
    }

    dp[node][parentHas] = std::max(dp[node][parentHas], curr - (s[node] == '1'));
    return dp[node][parentHas];
}

void solve()
{
    buildDFS(1, 0);
    std::cout << f(1, 0) << '\n';
}

void input()
{
    std::cin >> n;
    for (int i = 1 ; i < n ; ++i)
    {
        int u, v;
        std::cin >> u >> v;
        g[u].push_back(v);
        g[v].push_back(u);
    }

    std::cin >> s + 1;
}

void fastIOI()
{
    std::ios_base :: sync_with_stdio(0);
    std::cout.tie(nullptr);
    std::cin.tie(nullptr);
}   

int main()
{
    fastIOI();
    input();
    solve();

    return 0;
}

Compilation message

power.cpp: In function 'void input()':
power.cpp:97:19: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   97 |     std::cin >> s + 1;
      |                 ~~^~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 8792 KB Output is correct
2 Correct 2 ms 8792 KB Output is correct
3 Correct 2 ms 8796 KB Output is correct
4 Correct 1 ms 8796 KB Output is correct
5 Correct 2 ms 8796 KB Output is correct
6 Correct 2 ms 8796 KB Output is correct
7 Correct 2 ms 8796 KB Output is correct
8 Correct 1 ms 8796 KB Output is correct
9 Correct 2 ms 8796 KB Output is correct
10 Correct 2 ms 8796 KB Output is correct
11 Correct 1 ms 8796 KB Output is correct
12 Correct 2 ms 8796 KB Output is correct
13 Correct 2 ms 8792 KB Output is correct
14 Correct 2 ms 8796 KB Output is correct
15 Correct 2 ms 8796 KB Output is correct
16 Correct 1 ms 8796 KB Output is correct
17 Correct 2 ms 8800 KB Output is correct
18 Correct 1 ms 8796 KB Output is correct
19 Correct 2 ms 8796 KB Output is correct
20 Correct 2 ms 8796 KB Output is correct
21 Correct 1 ms 8796 KB Output is correct

Subtask #2
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 8792 KB Output is correct
2 Correct 2 ms 8792 KB Output is correct
3 Correct 2 ms 8796 KB Output is correct
4 Correct 1 ms 8796 KB Output is correct
5 Correct 2 ms 8796 KB Output is correct
6 Correct 2 ms 8796 KB Output is correct
7 Correct 2 ms 8796 KB Output is correct
8 Correct 1 ms 8796 KB Output is correct
9 Correct 2 ms 8796 KB Output is correct
10 Correct 2 ms 8796 KB Output is correct
11 Correct 1 ms 8796 KB Output is correct
12 Correct 2 ms 8796 KB Output is correct
13 Correct 2 ms 8792 KB Output is correct
14 Correct 2 ms 8796 KB Output is correct
15 Correct 2 ms 8796 KB Output is correct
16 Correct 1 ms 8796 KB Output is correct
17 Correct 2 ms 8800 KB Output is correct
18 Correct 1 ms 8796 KB Output is correct
19 Correct 2 ms 8796 KB Output is correct
20 Correct 2 ms 8796 KB Output is correct
21 Correct 1 ms 8796 KB Output is correct
22 Correct 3 ms 8796 KB Output is correct
23 Correct 3 ms 8920 KB Output is correct
24 Correct 3 ms 8792 KB Output is correct
25 Correct 3 ms 8860 KB Output is correct
26 Correct 2 ms 8796 KB Output is correct
27 Correct 2 ms 8796 KB Output is correct
28 Correct 3 ms 8796 KB Output is correct
29 Correct 2 ms 8796 KB Output is correct
30 Correct 2 ms 8796 KB Output is correct
31 Correct 2 ms 8796 KB Output is correct
32 Correct 2 ms 8796 KB Output is correct
33 Correct 2 ms 8796 KB Output is correct
34 Correct 2 ms 8796 KB Output is correct
35 Correct 2 ms 8796 KB Output is correct
36 Correct 2 ms 8792 KB Output is correct
37 Correct 3 ms 8796 KB Output is correct
38 Correct 2 ms 8796 KB Output is correct
39 Correct 3 ms 8836 KB Output is correct
40 Correct 3 ms 8852 KB Output is correct
41 Correct 3 ms 8796 KB Output is correct
42 Correct 3 ms 8796 KB Output is correct
43 Correct 2 ms 8796 KB Output is correct
44 Correct 3 ms 8796 KB Output is correct
45 Correct 2 ms 8796 KB Output is correct
46 Correct 2 ms 8796 KB Output is correct
47 Correct 2 ms 8792 KB Output is correct
48 Correct 2 ms 8796 KB Output is correct
49 Correct 2 ms 8856 KB Output is correct
50 Correct 3 ms 8796 KB Output is correct
51 Correct 2 ms 8984 KB Output is correct
52 Correct 2 ms 9108 KB Output is correct
53 Correct 2 ms 8796 KB Output is correct
54 Correct 2 ms 8796 KB Output is correct
55 Correct 2 ms 8796 KB Output is correct
56 Correct 2 ms 8796 KB Output is correct
57 Correct 2 ms 8796 KB Output is correct
58 Correct 2 ms 8796 KB Output is correct
59 Correct 2 ms 8796 KB Output is correct
60 Correct 2 ms 8856 KB Output is correct
61 Correct 2 ms 8796 KB Output is correct
62 Correct 2 ms 8796 KB Output is correct
63 Correct 3 ms 8792 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 8792 KB Output is correct
2 Correct 2 ms 8792 KB Output is correct
3 Correct 2 ms 8796 KB Output is correct
4 Correct 1 ms 8796 KB Output is correct
5 Correct 2 ms 8796 KB Output is correct
6 Correct 2 ms 8796 KB Output is correct
7 Correct 2 ms 8796 KB Output is correct
8 Correct 1 ms 8796 KB Output is correct
9 Correct 2 ms 8796 KB Output is correct
10 Correct 2 ms 8796 KB Output is correct
11 Correct 1 ms 8796 KB Output is correct
12 Correct 2 ms 8796 KB Output is correct
13 Correct 2 ms 8792 KB Output is correct
14 Correct 2 ms 8796 KB Output is correct
15 Correct 2 ms 8796 KB Output is correct
16 Correct 1 ms 8796 KB Output is correct
17 Correct 2 ms 8800 KB Output is correct
18 Correct 1 ms 8796 KB Output is correct
19 Correct 2 ms 8796 KB Output is correct
20 Correct 2 ms 8796 KB Output is correct
21 Correct 1 ms 8796 KB Output is correct
22 Correct 3 ms 8796 KB Output is correct
23 Correct 3 ms 8920 KB Output is correct
24 Correct 3 ms 8792 KB Output is correct
25 Correct 3 ms 8860 KB Output is correct
26 Correct 2 ms 8796 KB Output is correct
27 Correct 2 ms 8796 KB Output is correct
28 Correct 3 ms 8796 KB Output is correct
29 Correct 2 ms 8796 KB Output is correct
30 Correct 2 ms 8796 KB Output is correct
31 Correct 2 ms 8796 KB Output is correct
32 Correct 2 ms 8796 KB Output is correct
33 Correct 2 ms 8796 KB Output is correct
34 Correct 2 ms 8796 KB Output is correct
35 Correct 2 ms 8796 KB Output is correct
36 Correct 2 ms 8792 KB Output is correct
37 Correct 3 ms 8796 KB Output is correct
38 Correct 2 ms 8796 KB Output is correct
39 Correct 3 ms 8836 KB Output is correct
40 Correct 3 ms 8852 KB Output is correct
41 Correct 3 ms 8796 KB Output is correct
42 Correct 3 ms 8796 KB Output is correct
43 Correct 2 ms 8796 KB Output is correct
44 Correct 3 ms 8796 KB Output is correct
45 Correct 2 ms 8796 KB Output is correct
46 Correct 2 ms 8796 KB Output is correct
47 Correct 2 ms 8792 KB Output is correct
48 Correct 2 ms 8796 KB Output is correct
49 Correct 2 ms 8856 KB Output is correct
50 Correct 3 ms 8796 KB Output is correct
51 Correct 2 ms 8984 KB Output is correct
52 Correct 2 ms 9108 KB Output is correct
53 Correct 2 ms 8796 KB Output is correct
54 Correct 2 ms 8796 KB Output is correct
55 Correct 2 ms 8796 KB Output is correct
56 Correct 2 ms 8796 KB Output is correct
57 Correct 2 ms 8796 KB Output is correct
58 Correct 2 ms 8796 KB Output is correct
59 Correct 2 ms 8796 KB Output is correct
60 Correct 2 ms 8856 KB Output is correct
61 Correct 2 ms 8796 KB Output is correct
62 Correct 2 ms 8796 KB Output is correct
63 Correct 3 ms 8792 KB Output is correct
64 Correct 77 ms 17752 KB Output is correct
65 Correct 77 ms 17792 KB Output is correct
66 Correct 80 ms 17748 KB Output is correct
67 Correct 79 ms 17912 KB Output is correct
68 Correct 93 ms 18196 KB Output is correct
69 Correct 92 ms 17748 KB Output is correct
70 Correct 108 ms 17908 KB Output is correct
71 Correct 72 ms 17752 KB Output is correct
72 Correct 69 ms 17748 KB Output is correct
73 Correct 141 ms 27900 KB Output is correct
74 Correct 142 ms 27732 KB Output is correct
75 Correct 74 ms 17612 KB Output is correct
76 Correct 103 ms 17684 KB Output is correct
77 Correct 88 ms 17696 KB Output is correct
78 Correct 129 ms 17732 KB Output is correct
79 Correct 75 ms 17748 KB Output is correct
80 Correct 72 ms 17800 KB Output is correct
81 Correct 67 ms 18124 KB Output is correct
82 Correct 81 ms 17928 KB Output is correct
83 Correct 128 ms 21924 KB Output is correct
84 Correct 153 ms 23700 KB Output is correct
85 Correct 99 ms 23376 KB Output is correct
86 Correct 113 ms 18768 KB Output is correct
87 Correct 79 ms 18516 KB Output is correct
88 Correct 108 ms 18976 KB Output is correct
89 Correct 101 ms 18868 KB Output is correct
90 Correct 129 ms 18836 KB Output is correct
91 Correct 82 ms 19028 KB Output is correct
92 Correct 110 ms 19300 KB Output is correct
93 Correct 107 ms 20892 KB Output is correct
94 Correct 104 ms 22392 KB Output is correct
95 Correct 115 ms 21364 KB Output is correct
96 Correct 83 ms 20052 KB Output is correct
97 Correct 70 ms 18772 KB Output is correct
98 Correct 93 ms 18448 KB Output is correct
99 Correct 104 ms 18132 KB Output is correct
100 Correct 84 ms 20600 KB Output is correct
101 Correct 78 ms 18936 KB Output is correct
102 Correct 74 ms 18516 KB Output is correct
103 Correct 118 ms 18280 KB Output is correct
104 Correct 63 ms 18632 KB Output is correct
105 Correct 102 ms 25424 KB Output is correct
106 Correct 54 ms 18376 KB Output is correct
107 Correct 49 ms 18372 KB Output is correct
108 Correct 125 ms 28504 KB Output is correct
109 Correct 58 ms 18488 KB Output is correct
110 Correct 121 ms 28612 KB Output is correct
111 Correct 62 ms 17744 KB Output is correct