oj.uz

Submission #657828

# Submission time Handle Problem Language Result Execution time Memory
657828 2022-11-11T13:47:17 Z Do_you_copy Election Campaign (JOI15_election_campaign) C++17
100 / 100
 472 ms 35248 KB 
/*
    Procrastination is the art of keeping up with yesterday
*/
#include <bits/stdc++.h>
#define pb push_back
#define fi first
#define se second
#define faster ios_base::sync_with_stdio(0); cin.tie(0);
#define int long long
using namespace std;
using ll = long long;
using ld = long double;
using pii = pair <int, int>;
mt19937_64 Rand(chrono::steady_clock::now().time_since_epoch().count());
const int maxN = 1e5 + 1;
//const int Mod = 1e9 + 7;
//const int inf =
int n, q;

struct TST{
    vector <ll> st;
    void resize(int _n){
        st.resize(_n, 0);
    }
    void update(int id, int i, ll val, int l = 1, int r = n){
        if (l == r){
            st[id] = val;
            return;
        }
        int mid = (l + r) >> 1;
        if (i <= mid) update(id << 1, i, val, l, mid);
        else update(id << 1 | 1, i, val, mid + 1, r);
        st[id] = st[id << 1] + st[id << 1 | 1];
    }
    int get(int id, int i, int j, int l = 1, int r = n){
        if (i > r || l > j) return 0;
        if (i <= l && r <= j) return st[id];
        int mid = (l + r) >> 1;
        return get(id << 1, i, j, l, mid) + get(id << 1 | 1, i, j, mid + 1, r);
    }
};
TST tree[2];

struct TLine{
    int u, v, c;
};

TLine e[maxN];
vector <int> adj[maxN];
vector <int> Q[maxN];
int child[maxN];
int id[maxN], num[maxN], timedfs, nodecnt = 1;
int head[maxN], tail[maxN];
int depth[maxN];
int par[maxN];
ll dp[maxN];

inline int lca(int u, int v){
    while (id[u] != id[v]){
        if (depth[head[id[u]]] < depth[head[id[v]]]) swap(u, v);
        u = par[head[id[u]]];
    }
    if (depth[u] < depth[v]) swap(u, v);
    return v;
}

inline ll Query(int u, int v, int t){
    int res = 0;
    while (id[u] != id[v]){
        if (depth[head[id[u]]] < depth[head[id[v]]]) swap(u, v);
        res += tree[t].get(1, num[head[id[u]]], num[u]);
        u = par[head[id[u]]];
    }
    if (depth[u] < depth[v]) swap(u, v);
    res += tree[t].get(1, num[v], num[u]);
    return res;
}

void pre_dfs(int u, int p){
    depth[u] = depth[p] + 1;
    par[u] = p;
    for (int i: adj[u]){
        if (i == p) continue;
        pre_dfs(i, u);
        child[u] += child[i] + 1;
    }
}

void hld(int u){
    if (!head[nodecnt]) head[nodecnt] = u;
    id[u] = nodecnt;
    num[u] = ++timedfs;
    pii maxx = {-1, -1};
    for (int i: adj[u]){
        if (i == par[u]) continue;
        maxx = max(maxx, {child[i], i});
    }
    if (maxx.se != -1){
        hld(maxx.se);
    }
    else tail[nodecnt] = u;
    for (int i: adj[u]){
        if (i == par[u] || i == maxx.se) continue;
        ++nodecnt;
        hld(i);
    }
}


void dfs(int u){
    ll sum = 0;
    for (int i: adj[u]){
        if (i == par[u]) continue;
        dfs(i);
        sum += dp[i];
    }
    dp[u] = sum;
    tree[0].update(1, num[u], dp[u]);
    for (int i: Q[u]){
        dp[u] = max(dp[u], Query(e[i].u, e[i].v, 0) - Query(e[i].u, e[i].v, 1) + e[i].c);
    }
    tree[1].update(1, num[u], dp[u]);
}

void Init(){
    cin >> n;
    for (int i = 1; i < n; ++i){
        int u, v;
        cin >> u >> v;
        adj[u].pb(v);
        adj[v].pb(u);
    }
    pre_dfs(1, 0);
    hld(1);
    tree[0].resize(maxN * 4);
    tree[1].resize(maxN * 4);
    cin >> q;
    for (int i = 1; i <= q; ++i){
        cin >> e[i].u >> e[i].v >> e[i].c;
        Q[lca(e[i].u, e[i].v)].pb(i);
    }
    dfs(1);
    cout << dp[1];
}

#define debug
#define taskname "test"
signed main(){
    faster
    if (fopen(taskname".inp", "r")){
        freopen(taskname".inp", "r", stdin);
        freopen(taskname".out", "w", stdout);
    }
    int tt = 1;
    //cin >> tt;
    while (tt--){
        Init();
    }
    if (fopen("timeout.txt", "r")){
        ofstream timeout("timeout.txt");
        timeout << signed(double(clock()) / CLOCKS_PER_SEC * 1000);
        timeout.close();
        #ifndef debug
        cerr << "Time elapsed: " << signed(double(clock()) / CLOCKS_PER_SEC * 1000) << "ms\n";
        #endif // debug
    }
}

Compilation message

election_campaign.cpp: In function 'int main()':
election_campaign.cpp:151:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  151 |         freopen(taskname".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
election_campaign.cpp:152:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  152 |         freopen(taskname".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11348 KB Output is correct
2 Correct 6 ms 11316 KB Output is correct
3 Correct 5 ms 11312 KB Output is correct
4 Correct 7 ms 11352 KB Output is correct
5 Correct 104 ms 21824 KB Output is correct
6 Correct 56 ms 29588 KB Output is correct
7 Correct 84 ms 27212 KB Output is correct
8 Correct 78 ms 21948 KB Output is correct
9 Correct 97 ms 25340 KB Output is correct
10 Correct 75 ms 21964 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11348 KB Output is correct
2 Correct 7 ms 11348 KB Output is correct
3 Correct 6 ms 11476 KB Output is correct
4 Correct 142 ms 34848 KB Output is correct
5 Correct 134 ms 34928 KB Output is correct
6 Correct 130 ms 34848 KB Output is correct
7 Correct 131 ms 34864 KB Output is correct
8 Correct 150 ms 35072 KB Output is correct
9 Correct 131 ms 34912 KB Output is correct
10 Correct 129 ms 34776 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11348 KB Output is correct
2 Correct 7 ms 11348 KB Output is correct
3 Correct 6 ms 11476 KB Output is correct
4 Correct 142 ms 34848 KB Output is correct
5 Correct 134 ms 34928 KB Output is correct
6 Correct 130 ms 34848 KB Output is correct
7 Correct 131 ms 34864 KB Output is correct
8 Correct 150 ms 35072 KB Output is correct
9 Correct 131 ms 34912 KB Output is correct
10 Correct 129 ms 34776 KB Output is correct
11 Correct 17 ms 12620 KB Output is correct
12 Correct 143 ms 35164 KB Output is correct
13 Correct 149 ms 35148 KB Output is correct
14 Correct 117 ms 35124 KB Output is correct
15 Correct 135 ms 35248 KB Output is correct
16 Correct 155 ms 35224 KB Output is correct
17 Correct 133 ms 35120 KB Output is correct
18 Correct 135 ms 35124 KB Output is correct
19 Correct 116 ms 35124 KB Output is correct
20 Correct 151 ms 35088 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 429 ms 26504 KB Output is correct
2 Correct 149 ms 34892 KB Output is correct
3 Correct 218 ms 32020 KB Output is correct
4 Correct 225 ms 26764 KB Output is correct
5 Correct 194 ms 31436 KB Output is correct
6 Correct 217 ms 26720 KB Output is correct
7 Correct 224 ms 31212 KB Output is correct
8 Correct 270 ms 26760 KB Output is correct
9 Correct 130 ms 34892 KB Output is correct
10 Correct 214 ms 30012 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11348 KB Output is correct
2 Correct 6 ms 11316 KB Output is correct
3 Correct 5 ms 11312 KB Output is correct
4 Correct 7 ms 11352 KB Output is correct
5 Correct 104 ms 21824 KB Output is correct
6 Correct 56 ms 29588 KB Output is correct
7 Correct 84 ms 27212 KB Output is correct
8 Correct 78 ms 21948 KB Output is correct
9 Correct 97 ms 25340 KB Output is correct
10 Correct 75 ms 21964 KB Output is correct
11 Correct 8 ms 11452 KB Output is correct
12 Correct 7 ms 11580 KB Output is correct
13 Correct 6 ms 11476 KB Output is correct
14 Correct 7 ms 11476 KB Output is correct
15 Correct 10 ms 11476 KB Output is correct
16 Correct 9 ms 11476 KB Output is correct
17 Correct 7 ms 11448 KB Output is correct
18 Correct 7 ms 11448 KB Output is correct
19 Correct 7 ms 11476 KB Output is correct
20 Correct 7 ms 11604 KB Output is correct

Subtask #6
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11348 KB Output is correct
2 Correct 6 ms 11316 KB Output is correct
3 Correct 5 ms 11312 KB Output is correct
4 Correct 7 ms 11352 KB Output is correct
5 Correct 104 ms 21824 KB Output is correct
6 Correct 56 ms 29588 KB Output is correct
7 Correct 84 ms 27212 KB Output is correct
8 Correct 78 ms 21948 KB Output is correct
9 Correct 97 ms 25340 KB Output is correct
10 Correct 75 ms 21964 KB Output is correct
11 Correct 6 ms 11348 KB Output is correct
12 Correct 7 ms 11348 KB Output is correct
13 Correct 6 ms 11476 KB Output is correct
14 Correct 142 ms 34848 KB Output is correct
15 Correct 134 ms 34928 KB Output is correct
16 Correct 130 ms 34848 KB Output is correct
17 Correct 131 ms 34864 KB Output is correct
18 Correct 150 ms 35072 KB Output is correct
19 Correct 131 ms 34912 KB Output is correct
20 Correct 129 ms 34776 KB Output is correct
21 Correct 17 ms 12620 KB Output is correct
22 Correct 143 ms 35164 KB Output is correct
23 Correct 149 ms 35148 KB Output is correct
24 Correct 117 ms 35124 KB Output is correct
25 Correct 135 ms 35248 KB Output is correct
26 Correct 155 ms 35224 KB Output is correct
27 Correct 133 ms 35120 KB Output is correct
28 Correct 135 ms 35124 KB Output is correct
29 Correct 116 ms 35124 KB Output is correct
30 Correct 151 ms 35088 KB Output is correct
31 Correct 429 ms 26504 KB Output is correct
32 Correct 149 ms 34892 KB Output is correct
33 Correct 218 ms 32020 KB Output is correct
34 Correct 225 ms 26764 KB Output is correct
35 Correct 194 ms 31436 KB Output is correct
36 Correct 217 ms 26720 KB Output is correct
37 Correct 224 ms 31212 KB Output is correct
38 Correct 270 ms 26760 KB Output is correct
39 Correct 130 ms 34892 KB Output is correct
40 Correct 214 ms 30012 KB Output is correct
41 Correct 8 ms 11452 KB Output is correct
42 Correct 7 ms 11580 KB Output is correct
43 Correct 6 ms 11476 KB Output is correct
44 Correct 7 ms 11476 KB Output is correct
45 Correct 10 ms 11476 KB Output is correct
46 Correct 9 ms 11476 KB Output is correct
47 Correct 7 ms 11448 KB Output is correct
48 Correct 7 ms 11448 KB Output is correct
49 Correct 7 ms 11476 KB Output is correct
50 Correct 7 ms 11604 KB Output is correct
51 Correct 315 ms 27064 KB Output is correct
52 Correct 135 ms 35148 KB Output is correct
53 Correct 249 ms 30404 KB Output is correct
54 Correct 178 ms 26924 KB Output is correct
55 Correct 472 ms 26808 KB Output is correct
56 Correct 135 ms 35248 KB Output is correct
57 Correct 180 ms 31100 KB Output is correct
58 Correct 271 ms 27000 KB Output is correct
59 Correct 264 ms 27044 KB Output is correct
60 Correct 148 ms 35172 KB Output is correct
61 Correct 207 ms 31352 KB Output is correct
62 Correct 215 ms 26832 KB Output is correct
63 Correct 430 ms 26728 KB Output is correct
64 Correct 135 ms 35148 KB Output is correct
65 Correct 226 ms 31152 KB Output is correct
66 Correct 208 ms 27072 KB Output is correct
67 Correct 465 ms 26712 KB Output is correct
68 Correct 144 ms 35120 KB Output is correct
69 Correct 185 ms 29808 KB Output is correct
70 Correct 226 ms 27172 KB Output is correct