oj.uz

Submission #251893

# Submission time Handle Problem Language Result Execution time Memory
251893 2020-07-23T00:38:49 Z LifeHappen__ Election Campaign (JOI15_election_campaign) C++14
100 / 100
 252 ms 33400 KB 
#include <bits/stdc++.h>

using namespace std;

#define forinc(a, b, c) for(int a=b, _c=c; a<=_c; ++a)
#define fordec(a, b, c) for(int a=b, _c=c; a>=_c; --a)
#define forv(a, b) for(auto &a : b)
#define rep(i, n) forinc(i, 1, n)
#define repv(i, n) forinc(i, 0, n - 1)

#define ii pair<int,int>
#define fi first
#define se second
#define all(a) begin(a), end(a)
#define reset(f, x) memset(f, x, sizeof(f))
#define eb emplace_back
#define pb push_back

const int N = 1e5+5;
int n, m;
struct pack {int u, v, c;};
vector<pack> que[N];
vector<int> ad[N];
int st[N], en[N], id, it[4 * N];
int pd[N][26], dep[N], f[N], g[N];

void upd(int i, int val) {
    for(; i <= n; i += i & -i) it[i] += val;
}
int get(int i) {
    int ans = 0;
    for(; i; i -= i & -i) ans += it[i];
    return ans;
}

void dfs(int u, int par) {
    rep(i, 20) pd[u][i] = pd[pd[u][i - 1]][i - 1];
    st[u] = ++id;
    forv(v, ad[u]) if(v != par) {
        dep[v] = dep[u] + 1;
        pd[v][0] = u;
        dfs(v, u);
    }
    en[u] = id;
}
int lca(int u, int v) {
    if(dep[u] < dep[v]) swap(u, v);
    int unx = dep[u] - dep[v];
    fordec(i, 20, 0) if(unx >> i & 1) u = pd[u][i];
    if(u == v) return u;
    fordec(i, 20, 0) if(pd[u][i] != pd[v][i]) u = pd[u][i], v = pd[v][i];
    return pd[u][0];
}
void dfs1(int u, int par) {
    forv(v, ad[u]) if(v != par) {
        dfs1(v, u);
        g[u] += f[v];
    }
    forv(v, ad[u]) if(v != par) {
        upd(st[v], g[u] - f[v]);
        upd(en[v] + 1, f[v] - g[u]);
    }
    f[u] = g[u];
    forv(p, que[u]) {
        int x = p.u, y = p.v, c = p.c;
        f[u] = max(f[u], get(st[x]) + get(st[y]) + g[x] + g[y] - g[u] + c);
    }
}

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
    cin >> n;
    rep(i, n - 1) {
        int u, v;
        cin >> u >> v;
        ad[u].pb(v); ad[v].pb(u);
    }
    dfs(1, 0);
    cin >> m;
    rep(i, m) {
        int u, v, c;
        cin >> u >> v >> c;
        int p = lca(u, v);
        que[p].pb({u, v, c});
    }
    dfs1(1, 0);
    cout << f[1] << '\n';
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5120 KB Output is correct
2 Correct 3 ms 5120 KB Output is correct
3 Correct 3 ms 5120 KB Output is correct
4 Correct 4 ms 5248 KB Output is correct
5 Correct 104 ms 22008 KB Output is correct
6 Correct 66 ms 29688 KB Output is correct
7 Correct 119 ms 27000 KB Output is correct
8 Correct 77 ms 22008 KB Output is correct
9 Correct 158 ms 25464 KB Output is correct
10 Correct 76 ms 22008 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5120 KB Output is correct
2 Correct 3 ms 5120 KB Output is correct
3 Correct 4 ms 5376 KB Output is correct
4 Correct 140 ms 33020 KB Output is correct
5 Correct 136 ms 33016 KB Output is correct
6 Correct 127 ms 33020 KB Output is correct
7 Correct 137 ms 33004 KB Output is correct
8 Correct 137 ms 33016 KB Output is correct
9 Correct 126 ms 33016 KB Output is correct
10 Correct 137 ms 33016 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5120 KB Output is correct
2 Correct 3 ms 5120 KB Output is correct
3 Correct 4 ms 5376 KB Output is correct
4 Correct 140 ms 33020 KB Output is correct
5 Correct 136 ms 33016 KB Output is correct
6 Correct 127 ms 33020 KB Output is correct
7 Correct 137 ms 33004 KB Output is correct
8 Correct 137 ms 33016 KB Output is correct
9 Correct 126 ms 33016 KB Output is correct
10 Correct 137 ms 33016 KB Output is correct
11 Correct 15 ms 6016 KB Output is correct
12 Correct 144 ms 33272 KB Output is correct
13 Correct 140 ms 33272 KB Output is correct
14 Correct 129 ms 33272 KB Output is correct
15 Correct 145 ms 33272 KB Output is correct
16 Correct 132 ms 33272 KB Output is correct
17 Correct 142 ms 33272 KB Output is correct
18 Correct 141 ms 33272 KB Output is correct
19 Correct 135 ms 33272 KB Output is correct
20 Correct 142 ms 33316 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 180 ms 24752 KB Output is correct
2 Correct 145 ms 33112 KB Output is correct
3 Correct 252 ms 29944 KB Output is correct
4 Correct 131 ms 24880 KB Output is correct
5 Correct 206 ms 29476 KB Output is correct
6 Correct 127 ms 24808 KB Output is correct
7 Correct 231 ms 29360 KB Output is correct
8 Correct 245 ms 25176 KB Output is correct
9 Correct 149 ms 32944 KB Output is correct
10 Correct 238 ms 28208 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5120 KB Output is correct
2 Correct 3 ms 5120 KB Output is correct
3 Correct 3 ms 5120 KB Output is correct
4 Correct 4 ms 5248 KB Output is correct
5 Correct 104 ms 22008 KB Output is correct
6 Correct 66 ms 29688 KB Output is correct
7 Correct 119 ms 27000 KB Output is correct
8 Correct 77 ms 22008 KB Output is correct
9 Correct 158 ms 25464 KB Output is correct
10 Correct 76 ms 22008 KB Output is correct
11 Correct 5 ms 5376 KB Output is correct
12 Correct 5 ms 5248 KB Output is correct
13 Correct 4 ms 5248 KB Output is correct
14 Correct 4 ms 5248 KB Output is correct
15 Correct 9 ms 5248 KB Output is correct
16 Correct 4 ms 5248 KB Output is correct
17 Correct 8 ms 5248 KB Output is correct
18 Correct 7 ms 5248 KB Output is correct
19 Correct 4 ms 5248 KB Output is correct
20 Correct 5 ms 5376 KB Output is correct

Subtask #6
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5120 KB Output is correct
2 Correct 3 ms 5120 KB Output is correct
3 Correct 3 ms 5120 KB Output is correct
4 Correct 4 ms 5248 KB Output is correct
5 Correct 104 ms 22008 KB Output is correct
6 Correct 66 ms 29688 KB Output is correct
7 Correct 119 ms 27000 KB Output is correct
8 Correct 77 ms 22008 KB Output is correct
9 Correct 158 ms 25464 KB Output is correct
10 Correct 76 ms 22008 KB Output is correct
11 Correct 3 ms 5120 KB Output is correct
12 Correct 3 ms 5120 KB Output is correct
13 Correct 4 ms 5376 KB Output is correct
14 Correct 140 ms 33020 KB Output is correct
15 Correct 136 ms 33016 KB Output is correct
16 Correct 127 ms 33020 KB Output is correct
17 Correct 137 ms 33004 KB Output is correct
18 Correct 137 ms 33016 KB Output is correct
19 Correct 126 ms 33016 KB Output is correct
20 Correct 137 ms 33016 KB Output is correct
21 Correct 15 ms 6016 KB Output is correct
22 Correct 144 ms 33272 KB Output is correct
23 Correct 140 ms 33272 KB Output is correct
24 Correct 129 ms 33272 KB Output is correct
25 Correct 145 ms 33272 KB Output is correct
26 Correct 132 ms 33272 KB Output is correct
27 Correct 142 ms 33272 KB Output is correct
28 Correct 141 ms 33272 KB Output is correct
29 Correct 135 ms 33272 KB Output is correct
30 Correct 142 ms 33316 KB Output is correct
31 Correct 180 ms 24752 KB Output is correct
32 Correct 145 ms 33112 KB Output is correct
33 Correct 252 ms 29944 KB Output is correct
34 Correct 131 ms 24880 KB Output is correct
35 Correct 206 ms 29476 KB Output is correct
36 Correct 127 ms 24808 KB Output is correct
37 Correct 231 ms 29360 KB Output is correct
38 Correct 245 ms 25176 KB Output is correct
39 Correct 149 ms 32944 KB Output is correct
40 Correct 238 ms 28208 KB Output is correct
41 Correct 5 ms 5376 KB Output is correct
42 Correct 5 ms 5248 KB Output is correct
43 Correct 4 ms 5248 KB Output is correct
44 Correct 4 ms 5248 KB Output is correct
45 Correct 9 ms 5248 KB Output is correct
46 Correct 4 ms 5248 KB Output is correct
47 Correct 8 ms 5248 KB Output is correct
48 Correct 7 ms 5248 KB Output is correct
49 Correct 4 ms 5248 KB Output is correct
50 Correct 5 ms 5376 KB Output is correct
51 Correct 201 ms 25460 KB Output is correct
52 Correct 203 ms 33272 KB Output is correct
53 Correct 246 ms 28588 KB Output is correct
54 Correct 126 ms 25140 KB Output is correct
55 Correct 209 ms 25264 KB Output is correct
56 Correct 141 ms 33272 KB Output is correct
57 Correct 208 ms 29180 KB Output is correct
58 Correct 127 ms 25060 KB Output is correct
59 Correct 178 ms 25340 KB Output is correct
60 Correct 175 ms 33400 KB Output is correct
61 Correct 209 ms 29344 KB Output is correct
62 Correct 125 ms 24908 KB Output is correct
63 Correct 167 ms 24924 KB Output is correct
64 Correct 145 ms 33276 KB Output is correct
65 Correct 230 ms 29104 KB Output is correct
66 Correct 126 ms 25288 KB Output is correct
67 Correct 182 ms 25064 KB Output is correct
68 Correct 138 ms 33400 KB Output is correct
69 Correct 207 ms 28024 KB Output is correct
70 Correct 122 ms 25308 KB Output is correct