oj.uz

Submission #773268

# Submission time Handle Problem Language Result Execution time Memory
773268 2023-07-04T18:06:40 Z CyberCow Power Plant (JOI20_power) C++17
100 / 100
 135 ms 31140 KB 
//#include <bits/stdc++.h>
#include <random>
#include <algorithm>
#include <bitset>
#include <chrono>
#include <cmath>
#include <deque>
#include <fstream>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <map>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <vector>
#include <chrono>
#define fr first
#define sc second
#define ad push_back
using namespace std;
using ll = long long;
mt19937 rnd(348502);
const int N = 200005;
int n;
vector<int> v[N];
int dp[N], a[N];

void Dfs(int g, int p)
{
    for (auto to : v[g])
    {
        if (to != p)
        {
            Dfs(to, g);
        }
    }
    if (p == -1)
    {
        int ma = 0, gum = 0;
        for(auto to: v[g])
        {
            ma = max(ma, dp[to]);
            gum += dp[to];
        }
        dp[g] = max(ma + 1, gum - 1);
        return;
    }
    int gum = 0;
    for (auto to : v[g])
    {
        if (to != p)
            gum += dp[to];
    }
    if (a[g] == 1)
        dp[g] = max(gum - 1, 1);
    else
        dp[g] = gum;
}

int ans = 0;

void Dfs1(int g, int p, int arj)
{
    int gum = arj, ma = arj, ma1 = 0;
    for (auto to : v[g])
    {
        if (to != p)
        {
            gum += dp[to];
            if (ma <= dp[to])
            {
                ma1 = max(ma, ma1);
                ma = max(ma, dp[to]);
            }
            else
            {
                ma1 = max(ma1, dp[to]);
            }
            ma = max(ma, dp[to]);
        }
    }
    if (a[g] == 1)
    {
        ans = max(max(ans, ma + 1), max(1, gum - 1));
    }
    for (auto to : v[g])
    {
        if (to != p)
        {
            if (a[to] == 1)
            {
                if (dp[to] == ma)
                    Dfs1(to, g, max(1, gum - dp[to] - 1));
                else
                    Dfs1(to, g, max(1, gum - dp[to] - 1));
            }
            else
            {
                if (dp[to] == ma)
                    Dfs1(to, g, gum - dp[to]);
                else
                    Dfs1(to, g, gum - dp[to]);
            }
        }
    }
}

void solve()
{
    int i, j, x, y;
    cin >> n;
    for (i = 0; i < n - 1; i++)
    {
        cin >> x >> y;
        v[x].push_back(y);
        v[y].push_back(x);
    }
    char c;
    for (i = 1; i <= n; i++)
    {
        cin >> c;
        a[i] = c - '0';
    }
    for ( i = 1; i <= n; i++)   
    {
        if (a[i] == 1)
        {
            Dfs(i, -1);
            Dfs1(i, -1, 0);
            cout << ans;
            break;
        }
    }
}


int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int tt = 1;
    //cin >> tt;
    while (tt--) {
        solve();
    }
    return 0;
}

Compilation message

power.cpp: In function 'void solve()':
power.cpp:114:12: warning: unused variable 'j' [-Wunused-variable]
  114 |     int i, j, x, y;
      |            ^

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 2 ms 4948 KB Output is correct
11 Correct 2 ms 4948 KB Output is correct
12 Correct 2 ms 4948 KB Output is correct
13 Correct 2 ms 4948 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct
15 Correct 2 ms 4948 KB Output is correct
16 Correct 2 ms 4948 KB Output is correct
17 Correct 2 ms 4948 KB Output is correct
18 Correct 2 ms 4948 KB Output is correct
19 Correct 2 ms 4904 KB Output is correct
20 Correct 2 ms 4948 KB Output is correct
21 Correct 2 ms 4948 KB Output is correct

Subtask #2
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 2 ms 4948 KB Output is correct
11 Correct 2 ms 4948 KB Output is correct
12 Correct 2 ms 4948 KB Output is correct
13 Correct 2 ms 4948 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct
15 Correct 2 ms 4948 KB Output is correct
16 Correct 2 ms 4948 KB Output is correct
17 Correct 2 ms 4948 KB Output is correct
18 Correct 2 ms 4948 KB Output is correct
19 Correct 2 ms 4904 KB Output is correct
20 Correct 2 ms 4948 KB Output is correct
21 Correct 2 ms 4948 KB Output is correct
22 Correct 3 ms 5076 KB Output is correct
23 Correct 3 ms 5076 KB Output is correct
24 Correct 3 ms 5076 KB Output is correct
25 Correct 3 ms 5088 KB Output is correct
26 Correct 3 ms 5076 KB Output is correct
27 Correct 3 ms 5076 KB Output is correct
28 Correct 3 ms 5076 KB Output is correct
29 Correct 3 ms 5204 KB Output is correct
30 Correct 3 ms 5204 KB Output is correct
31 Correct 3 ms 5052 KB Output is correct
32 Correct 3 ms 5076 KB Output is correct
33 Correct 3 ms 5076 KB Output is correct
34 Correct 3 ms 5076 KB Output is correct
35 Correct 3 ms 5076 KB Output is correct
36 Correct 3 ms 5076 KB Output is correct
37 Correct 4 ms 5024 KB Output is correct
38 Correct 7 ms 5048 KB Output is correct
39 Correct 3 ms 5076 KB Output is correct
40 Correct 3 ms 5076 KB Output is correct
41 Correct 3 ms 5076 KB Output is correct
42 Correct 3 ms 5076 KB Output is correct
43 Correct 3 ms 5076 KB Output is correct
44 Correct 3 ms 5076 KB Output is correct
45 Correct 3 ms 5076 KB Output is correct
46 Correct 3 ms 5076 KB Output is correct
47 Correct 3 ms 5076 KB Output is correct
48 Correct 3 ms 5076 KB Output is correct
49 Correct 3 ms 5076 KB Output is correct
50 Correct 3 ms 5076 KB Output is correct
51 Correct 3 ms 5100 KB Output is correct
52 Correct 3 ms 5048 KB Output is correct
53 Correct 3 ms 5076 KB Output is correct
54 Correct 3 ms 5076 KB Output is correct
55 Correct 3 ms 5076 KB Output is correct
56 Correct 3 ms 5076 KB Output is correct
57 Correct 3 ms 5204 KB Output is correct
58 Correct 3 ms 5076 KB Output is correct
59 Correct 4 ms 5076 KB Output is correct
60 Correct 3 ms 5204 KB Output is correct
61 Correct 3 ms 5000 KB Output is correct
62 Correct 3 ms 5204 KB Output is correct
63 Correct 3 ms 5076 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 2 ms 4948 KB Output is correct
11 Correct 2 ms 4948 KB Output is correct
12 Correct 2 ms 4948 KB Output is correct
13 Correct 2 ms 4948 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct
15 Correct 2 ms 4948 KB Output is correct
16 Correct 2 ms 4948 KB Output is correct
17 Correct 2 ms 4948 KB Output is correct
18 Correct 2 ms 4948 KB Output is correct
19 Correct 2 ms 4904 KB Output is correct
20 Correct 2 ms 4948 KB Output is correct
21 Correct 2 ms 4948 KB Output is correct
22 Correct 3 ms 5076 KB Output is correct
23 Correct 3 ms 5076 KB Output is correct
24 Correct 3 ms 5076 KB Output is correct
25 Correct 3 ms 5088 KB Output is correct
26 Correct 3 ms 5076 KB Output is correct
27 Correct 3 ms 5076 KB Output is correct
28 Correct 3 ms 5076 KB Output is correct
29 Correct 3 ms 5204 KB Output is correct
30 Correct 3 ms 5204 KB Output is correct
31 Correct 3 ms 5052 KB Output is correct
32 Correct 3 ms 5076 KB Output is correct
33 Correct 3 ms 5076 KB Output is correct
34 Correct 3 ms 5076 KB Output is correct
35 Correct 3 ms 5076 KB Output is correct
36 Correct 3 ms 5076 KB Output is correct
37 Correct 4 ms 5024 KB Output is correct
38 Correct 7 ms 5048 KB Output is correct
39 Correct 3 ms 5076 KB Output is correct
40 Correct 3 ms 5076 KB Output is correct
41 Correct 3 ms 5076 KB Output is correct
42 Correct 3 ms 5076 KB Output is correct
43 Correct 3 ms 5076 KB Output is correct
44 Correct 3 ms 5076 KB Output is correct
45 Correct 3 ms 5076 KB Output is correct
46 Correct 3 ms 5076 KB Output is correct
47 Correct 3 ms 5076 KB Output is correct
48 Correct 3 ms 5076 KB Output is correct
49 Correct 3 ms 5076 KB Output is correct
50 Correct 3 ms 5076 KB Output is correct
51 Correct 3 ms 5100 KB Output is correct
52 Correct 3 ms 5048 KB Output is correct
53 Correct 3 ms 5076 KB Output is correct
54 Correct 3 ms 5076 KB Output is correct
55 Correct 3 ms 5076 KB Output is correct
56 Correct 3 ms 5076 KB Output is correct
57 Correct 3 ms 5204 KB Output is correct
58 Correct 3 ms 5076 KB Output is correct
59 Correct 4 ms 5076 KB Output is correct
60 Correct 3 ms 5204 KB Output is correct
61 Correct 3 ms 5000 KB Output is correct
62 Correct 3 ms 5204 KB Output is correct
63 Correct 3 ms 5076 KB Output is correct
64 Correct 84 ms 15616 KB Output is correct
65 Correct 85 ms 15564 KB Output is correct
66 Correct 81 ms 15660 KB Output is correct
67 Correct 113 ms 15644 KB Output is correct
68 Correct 114 ms 15564 KB Output is correct
69 Correct 88 ms 15648 KB Output is correct
70 Correct 82 ms 15604 KB Output is correct
71 Correct 124 ms 15604 KB Output is correct
72 Correct 80 ms 15680 KB Output is correct
73 Correct 117 ms 28264 KB Output is correct
74 Correct 111 ms 23392 KB Output is correct
75 Correct 85 ms 15436 KB Output is correct
76 Correct 79 ms 15496 KB Output is correct
77 Correct 107 ms 15484 KB Output is correct
78 Correct 120 ms 15488 KB Output is correct
79 Correct 78 ms 15540 KB Output is correct
80 Correct 91 ms 15432 KB Output is correct
81 Correct 71 ms 15796 KB Output is correct
82 Correct 75 ms 15688 KB Output is correct
83 Correct 95 ms 20708 KB Output is correct
84 Correct 101 ms 22816 KB Output is correct
85 Correct 135 ms 23336 KB Output is correct
86 Correct 84 ms 16588 KB Output is correct
87 Correct 85 ms 16636 KB Output is correct
88 Correct 80 ms 16808 KB Output is correct
89 Correct 112 ms 16832 KB Output is correct
90 Correct 102 ms 16568 KB Output is correct
91 Correct 81 ms 17000 KB Output is correct
92 Correct 81 ms 17128 KB Output is correct
93 Correct 89 ms 19604 KB Output is correct
94 Correct 115 ms 21212 KB Output is correct
95 Correct 81 ms 20004 KB Output is correct
96 Correct 95 ms 18296 KB Output is correct
97 Correct 77 ms 16720 KB Output is correct
98 Correct 78 ms 16220 KB Output is correct
99 Correct 98 ms 16000 KB Output is correct
100 Correct 85 ms 19132 KB Output is correct
101 Correct 77 ms 17160 KB Output is correct
102 Correct 74 ms 16332 KB Output is correct
103 Correct 79 ms 16184 KB Output is correct
104 Correct 50 ms 16448 KB Output is correct
105 Correct 114 ms 31140 KB Output is correct
106 Correct 54 ms 16188 KB Output is correct
107 Correct 55 ms 16172 KB Output is correct
108 Correct 107 ms 31120 KB Output is correct
109 Correct 67 ms 16348 KB Output is correct
110 Correct 111 ms 31140 KB Output is correct
111 Correct 80 ms 15516 KB Output is correct