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Submission #656199

# Submission time Handle Problem Language Result Execution time Memory
656199 2022-11-06T13:29:54 Z Ronin13 Power Plant (JOI20_power) C++14
100 / 100
 270 ms 27564 KB 
#include <bits/stdc++.h>
#define ll long long
#define ull unsigned ll
#define f first
#define s second
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pb push_back
#define epb emplace_back
using namespace std;

const int NMAX = 2e5 + 1;

int dp[NMAX][3];
char c[NMAX];
vector <vector <int> > g(NMAX);
int ans = 0;

void dfs(int v, int e = -1){
    for(int to : g[v]){
        if(to == e) continue;
        dfs(to, v);
    }
    int x = c[v] - '0';
    int sum = -x;
    int mx = 0;
    for(int to : g[v]){
        if(to == e) continue;
        sum += max(dp[to][1], dp[to][0]);
        mx = max(mx, dp[to][1]);
    }
    if(x) dp[v][1] = max(sum, 1), ans = max({ans, sum, 1, mx});
    else dp[v][1] = sum, ans = max(ans, sum);
    if(x){
        int mx = 0;
        int mx1 = 0;
        int sum = 0;
        for(int to : g[v]){
            mx = max(mx, dp[to][2]);
            mx1 = max(mx1, dp[to][1]);
        }
        dp[v][2] = max(mx1 + 1, mx - 1);
        ans = max(ans, mx);
        ans = max(ans, mx1 + 1);
    }
    else{
        int mx = 0;
        for(int to : g[v]){
            mx = max(mx, dp[to][2]);
        }
        dp[v][2] = mx;
        ans = max(ans, mx);
    }
}

int main(){
    int n; cin >> n;
    for(int i = 1; i < n; i++){
        int a, b; cin >> a >> b;
        g[a].pb(b);
        g[b].pb(a);
    }
    for(int i = 1; i <= n; i++)
        cin >> c[i];
    dfs(1);
    cout << ans;
    return 0;
}

Compilation message

power.cpp: In function 'void dfs(int, int)':
power.cpp:37:13: warning: unused variable 'sum' [-Wunused-variable]
   37 |         int sum = 0;
      |             ^~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4956 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 4 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 4 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 5012 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 4 ms 5016 KB Output is correct
16 Correct 3 ms 5016 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 5012 KB Output is correct
19 Correct 3 ms 5012 KB Output is correct
20 Correct 3 ms 5016 KB Output is correct
21 Correct 3 ms 4948 KB Output is correct

Subtask #2
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4956 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 4 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 4 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 5012 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 4 ms 5016 KB Output is correct
16 Correct 3 ms 5016 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 5012 KB Output is correct
19 Correct 3 ms 5012 KB Output is correct
20 Correct 3 ms 5016 KB Output is correct
21 Correct 3 ms 4948 KB Output is correct
22 Correct 4 ms 5084 KB Output is correct
23 Correct 4 ms 5076 KB Output is correct
24 Correct 4 ms 5032 KB Output is correct
25 Correct 4 ms 5028 KB Output is correct
26 Correct 4 ms 5076 KB Output is correct
27 Correct 4 ms 5036 KB Output is correct
28 Correct 4 ms 5088 KB Output is correct
29 Correct 4 ms 5156 KB Output is correct
30 Correct 4 ms 5076 KB Output is correct
31 Correct 4 ms 5028 KB Output is correct
32 Correct 5 ms 5024 KB Output is correct
33 Correct 4 ms 5032 KB Output is correct
34 Correct 4 ms 5076 KB Output is correct
35 Correct 4 ms 5076 KB Output is correct
36 Correct 4 ms 5076 KB Output is correct
37 Correct 4 ms 5076 KB Output is correct
38 Correct 4 ms 5076 KB Output is correct
39 Correct 4 ms 5156 KB Output is correct
40 Correct 4 ms 5076 KB Output is correct
41 Correct 4 ms 5076 KB Output is correct
42 Correct 4 ms 5076 KB Output is correct
43 Correct 4 ms 5076 KB Output is correct
44 Correct 4 ms 5076 KB Output is correct
45 Correct 4 ms 5076 KB Output is correct
46 Correct 4 ms 5032 KB Output is correct
47 Correct 5 ms 5076 KB Output is correct
48 Correct 6 ms 5076 KB Output is correct
49 Correct 5 ms 5088 KB Output is correct
50 Correct 5 ms 5076 KB Output is correct
51 Correct 4 ms 5084 KB Output is correct
52 Correct 4 ms 5028 KB Output is correct
53 Correct 4 ms 5076 KB Output is correct
54 Correct 4 ms 5024 KB Output is correct
55 Correct 4 ms 5076 KB Output is correct
56 Correct 4 ms 5028 KB Output is correct
57 Correct 4 ms 5204 KB Output is correct
58 Correct 6 ms 5076 KB Output is correct
59 Correct 4 ms 5076 KB Output is correct
60 Correct 5 ms 5160 KB Output is correct
61 Correct 4 ms 5076 KB Output is correct
62 Correct 5 ms 5276 KB Output is correct
63 Correct 4 ms 5028 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4956 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 4 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 4 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 5012 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 4 ms 5016 KB Output is correct
16 Correct 3 ms 5016 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 5012 KB Output is correct
19 Correct 3 ms 5012 KB Output is correct
20 Correct 3 ms 5016 KB Output is correct
21 Correct 3 ms 4948 KB Output is correct
22 Correct 4 ms 5084 KB Output is correct
23 Correct 4 ms 5076 KB Output is correct
24 Correct 4 ms 5032 KB Output is correct
25 Correct 4 ms 5028 KB Output is correct
26 Correct 4 ms 5076 KB Output is correct
27 Correct 4 ms 5036 KB Output is correct
28 Correct 4 ms 5088 KB Output is correct
29 Correct 4 ms 5156 KB Output is correct
30 Correct 4 ms 5076 KB Output is correct
31 Correct 4 ms 5028 KB Output is correct
32 Correct 5 ms 5024 KB Output is correct
33 Correct 4 ms 5032 KB Output is correct
34 Correct 4 ms 5076 KB Output is correct
35 Correct 4 ms 5076 KB Output is correct
36 Correct 4 ms 5076 KB Output is correct
37 Correct 4 ms 5076 KB Output is correct
38 Correct 4 ms 5076 KB Output is correct
39 Correct 4 ms 5156 KB Output is correct
40 Correct 4 ms 5076 KB Output is correct
41 Correct 4 ms 5076 KB Output is correct
42 Correct 4 ms 5076 KB Output is correct
43 Correct 4 ms 5076 KB Output is correct
44 Correct 4 ms 5076 KB Output is correct
45 Correct 4 ms 5076 KB Output is correct
46 Correct 4 ms 5032 KB Output is correct
47 Correct 5 ms 5076 KB Output is correct
48 Correct 6 ms 5076 KB Output is correct
49 Correct 5 ms 5088 KB Output is correct
50 Correct 5 ms 5076 KB Output is correct
51 Correct 4 ms 5084 KB Output is correct
52 Correct 4 ms 5028 KB Output is correct
53 Correct 4 ms 5076 KB Output is correct
54 Correct 4 ms 5024 KB Output is correct
55 Correct 4 ms 5076 KB Output is correct
56 Correct 4 ms 5028 KB Output is correct
57 Correct 4 ms 5204 KB Output is correct
58 Correct 6 ms 5076 KB Output is correct
59 Correct 4 ms 5076 KB Output is correct
60 Correct 5 ms 5160 KB Output is correct
61 Correct 4 ms 5076 KB Output is correct
62 Correct 5 ms 5276 KB Output is correct
63 Correct 4 ms 5028 KB Output is correct
64 Correct 246 ms 16532 KB Output is correct
65 Correct 226 ms 16628 KB Output is correct
66 Correct 220 ms 16732 KB Output is correct
67 Correct 220 ms 16676 KB Output is correct
68 Correct 214 ms 16624 KB Output is correct
69 Correct 209 ms 16556 KB Output is correct
70 Correct 217 ms 16692 KB Output is correct
71 Correct 215 ms 16556 KB Output is correct
72 Correct 218 ms 16592 KB Output is correct
73 Correct 238 ms 26676 KB Output is correct
74 Correct 237 ms 26532 KB Output is correct
75 Correct 202 ms 16396 KB Output is correct
76 Correct 210 ms 16676 KB Output is correct
77 Correct 209 ms 16644 KB Output is correct
78 Correct 270 ms 16528 KB Output is correct
79 Correct 219 ms 16428 KB Output is correct
80 Correct 200 ms 16472 KB Output is correct
81 Correct 188 ms 16896 KB Output is correct
82 Correct 193 ms 16844 KB Output is correct
83 Correct 262 ms 20580 KB Output is correct
84 Correct 227 ms 22356 KB Output is correct
85 Correct 229 ms 22096 KB Output is correct
86 Correct 214 ms 17684 KB Output is correct
87 Correct 227 ms 17228 KB Output is correct
88 Correct 232 ms 17816 KB Output is correct
89 Correct 201 ms 17692 KB Output is correct
90 Correct 200 ms 17480 KB Output is correct
91 Correct 201 ms 17688 KB Output is correct
92 Correct 196 ms 18008 KB Output is correct
93 Correct 234 ms 19744 KB Output is correct
94 Correct 189 ms 21036 KB Output is correct
95 Correct 203 ms 20176 KB Output is correct
96 Correct 246 ms 18676 KB Output is correct
97 Correct 190 ms 17492 KB Output is correct
98 Correct 221 ms 17164 KB Output is correct
99 Correct 215 ms 16964 KB Output is correct
100 Correct 203 ms 19468 KB Output is correct
101 Correct 249 ms 17952 KB Output is correct
102 Correct 210 ms 17516 KB Output is correct
103 Correct 226 ms 17188 KB Output is correct
104 Correct 185 ms 17320 KB Output is correct
105 Correct 224 ms 24140 KB Output is correct
106 Correct 166 ms 17140 KB Output is correct
107 Correct 210 ms 17168 KB Output is correct
108 Correct 228 ms 27256 KB Output is correct
109 Correct 162 ms 17380 KB Output is correct
110 Correct 237 ms 27564 KB Output is correct
111 Correct 200 ms 16516 KB Output is correct