oj.uz

Submission #370129

# Submission time Handle Problem Language Result Execution time Memory
370129 2021-02-23T10:52:26 Z Vladth11 Election Campaign (JOI15_election_campaign) C++14
100 / 100
 493 ms 42988 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define debug(x) cerr << #x << " " << x << "\n"
#define debug_with_space(x) cerr << #x << " " << x << " "
//#include "shoes.h"

using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
typedef pair <ll, ll> pii;
typedef pair <ll, pii> piii;
typedef tree <pii, null_type, less <pii>, rb_tree_tag, tree_order_statistics_node_update> OST;

const ll NMAX = 100001;
const ll INF = (1LL << 60);
const ll MOD = 1000000007;
const ll BLOCK = 316;
const ll nr_of_bits = 20;
const long double eps = 0.0000000000000001;

vector <ll> v[NMAX];
ll dp[NMAX][nr_of_bits + 1];
ll n;
ll lvl[NMAX];
pii timpi[NMAX];
ll stamp;
ll DP[NMAX];

ll aib[NMAX * 2 + 1];
void update(ll node, ll v) {
    for(ll i = node; i <= 2 * n; i += i&(-i)){
        aib[i] += v;
    }
}

ll query(ll node){
    ll v = 0;
    for(ll i = node; i > 0; i -= i&(-i)){
        v += aib[i];
    }
    return v;
}

struct queries {
    ll a, b, la, lb, val;
};

vector <queries> events[NMAX];

bool isParent(ll a, ll b) {
    return (timpi[a].first <= timpi[b].first && timpi[b].second <= timpi[a].second);
}

void DFS(ll node, ll p) {
    dp[node][0] = p;
    timpi[node].first = ++stamp;
    lvl[node] = lvl[p] + 1;
    for(auto x : v[node]) {
        if(x == p)
            continue;
        DFS(x, node);
    }
    timpi[node].second = ++stamp;
}

ll LCA(ll a, ll b) {
    if(lvl[a] > lvl[b])
        swap(a, b);
    ll r = a, pas = nr_of_bits;
    while(pas >= 0) {
        ll nxt = dp[r][pas];
        if(nxt != 0 && !isParent(nxt, b))
            r = nxt;
        pas--;
    }
    if(!isParent(r, b))
        r = dp[r][0];
    return r;
}
ll sol;

void Compute(ll node, ll p){
    ll sum = 0;
    for(auto x : v[node]){
        if(x == p)
            continue;
        Compute(x, node);
        sum += DP[x];
    }
    ll maxim = sum;
    for(auto x : events[node]){
        ll cost = sum + x.val;
        if(x.la != -1){
            ///poate facem ceva mai clean aici
            cost += query(timpi[x.a].first);
        }
        if(x.lb != -1){
            cost += query(timpi[x.b].first);
        }
        maxim = max(maxim, cost);
    }
    DP[node] = max(DP[node], maxim);
    ll val = sum - DP[node];
    update(timpi[node].first, val);
    update(timpi[node].second, -val);
}

int main() {
    ll i, j;
    cin >> n;
    for(i = 1; i < n; i++) {
        ll x, y;
        cin >> x >> y;
        v[x].push_back(y);
        v[y].push_back(x);
    }
    DFS(1, 0);
    for(j = 1; j <= nr_of_bits; j++) {
        for(i = 1; i <= n; i++) {
            dp[i][j] = dp[dp[i][j - 1]][j - 1];
        }
    }
    ll m;
    cin >> m;
    while(m--) {
        ll a, b, la, lb, val;
        cin >> a >> b >> val;
        ll lca = LCA(a, b);
        if(lvl[a] == lvl[lca]) {
            la = -1;
        } else {
            ll r = a, pas = nr_of_bits;
            while(pas >= 0) {
                ll nxt = dp[r][pas];
                if(nxt != 0 && !isParent(nxt, lca))
                    r = nxt;
                pas--;
            }
            la = r;
        }
        if(lvl[b] == lvl[lca]) {
            lb = -1;
        } else {
            ll r = b, pas = nr_of_bits;
            while(pas >= 0) {
                ll nxt = dp[r][pas];
                if(nxt != 0 && !isParent(nxt, lca))
                    r = nxt;
                pas--;
            }
            lb = r;
        }
        events[lca].push_back({a, b, la, lb, val});
    }
    Compute(1, 0);
    cout << DP[1];
    return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 4 ms 5100 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 4 ms 5356 KB Output is correct
5 Correct 187 ms 30316 KB Output is correct
6 Correct 122 ms 37100 KB Output is correct
7 Correct 156 ms 34796 KB Output is correct
8 Correct 149 ms 30336 KB Output is correct
9 Correct 164 ms 33260 KB Output is correct
10 Correct 139 ms 30188 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 4 ms 5100 KB Output is correct
3 Correct 5 ms 5356 KB Output is correct
4 Correct 340 ms 42780 KB Output is correct
5 Correct 335 ms 42732 KB Output is correct
6 Correct 300 ms 42732 KB Output is correct
7 Correct 343 ms 42732 KB Output is correct
8 Correct 342 ms 42860 KB Output is correct
9 Correct 291 ms 42732 KB Output is correct
10 Correct 325 ms 42732 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 4 ms 5100 KB Output is correct
3 Correct 5 ms 5356 KB Output is correct
4 Correct 340 ms 42780 KB Output is correct
5 Correct 335 ms 42732 KB Output is correct
6 Correct 300 ms 42732 KB Output is correct
7 Correct 343 ms 42732 KB Output is correct
8 Correct 342 ms 42860 KB Output is correct
9 Correct 291 ms 42732 KB Output is correct
10 Correct 325 ms 42732 KB Output is correct
11 Correct 30 ms 6892 KB Output is correct
12 Correct 344 ms 42860 KB Output is correct
13 Correct 346 ms 42672 KB Output is correct
14 Correct 330 ms 42732 KB Output is correct
15 Correct 354 ms 42860 KB Output is correct
16 Correct 315 ms 42732 KB Output is correct
17 Correct 335 ms 42732 KB Output is correct
18 Correct 332 ms 42732 KB Output is correct
19 Correct 308 ms 42732 KB Output is correct
20 Correct 338 ms 42840 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 303 ms 34956 KB Output is correct
2 Correct 301 ms 42860 KB Output is correct
3 Correct 493 ms 39944 KB Output is correct
4 Correct 263 ms 35672 KB Output is correct
5 Correct 399 ms 39300 KB Output is correct
6 Correct 284 ms 35468 KB Output is correct
7 Correct 458 ms 39004 KB Output is correct
8 Correct 328 ms 35072 KB Output is correct
9 Correct 299 ms 42732 KB Output is correct
10 Correct 427 ms 37764 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 4 ms 5100 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 4 ms 5356 KB Output is correct
5 Correct 187 ms 30316 KB Output is correct
6 Correct 122 ms 37100 KB Output is correct
7 Correct 156 ms 34796 KB Output is correct
8 Correct 149 ms 30336 KB Output is correct
9 Correct 164 ms 33260 KB Output is correct
10 Correct 139 ms 30188 KB Output is correct
11 Correct 6 ms 5356 KB Output is correct
12 Correct 7 ms 5376 KB Output is correct
13 Correct 7 ms 5356 KB Output is correct
14 Correct 5 ms 5356 KB Output is correct
15 Correct 6 ms 5356 KB Output is correct
16 Correct 5 ms 5356 KB Output is correct
17 Correct 6 ms 5356 KB Output is correct
18 Correct 6 ms 5356 KB Output is correct
19 Correct 5 ms 5356 KB Output is correct
20 Correct 5 ms 5356 KB Output is correct

Subtask #6
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 4 ms 5100 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 4 ms 5356 KB Output is correct
5 Correct 187 ms 30316 KB Output is correct
6 Correct 122 ms 37100 KB Output is correct
7 Correct 156 ms 34796 KB Output is correct
8 Correct 149 ms 30336 KB Output is correct
9 Correct 164 ms 33260 KB Output is correct
10 Correct 139 ms 30188 KB Output is correct
11 Correct 4 ms 5100 KB Output is correct
12 Correct 4 ms 5100 KB Output is correct
13 Correct 5 ms 5356 KB Output is correct
14 Correct 340 ms 42780 KB Output is correct
15 Correct 335 ms 42732 KB Output is correct
16 Correct 300 ms 42732 KB Output is correct
17 Correct 343 ms 42732 KB Output is correct
18 Correct 342 ms 42860 KB Output is correct
19 Correct 291 ms 42732 KB Output is correct
20 Correct 325 ms 42732 KB Output is correct
21 Correct 30 ms 6892 KB Output is correct
22 Correct 344 ms 42860 KB Output is correct
23 Correct 346 ms 42672 KB Output is correct
24 Correct 330 ms 42732 KB Output is correct
25 Correct 354 ms 42860 KB Output is correct
26 Correct 315 ms 42732 KB Output is correct
27 Correct 335 ms 42732 KB Output is correct
28 Correct 332 ms 42732 KB Output is correct
29 Correct 308 ms 42732 KB Output is correct
30 Correct 338 ms 42840 KB Output is correct
31 Correct 303 ms 34956 KB Output is correct
32 Correct 301 ms 42860 KB Output is correct
33 Correct 493 ms 39944 KB Output is correct
34 Correct 263 ms 35672 KB Output is correct
35 Correct 399 ms 39300 KB Output is correct
36 Correct 284 ms 35468 KB Output is correct
37 Correct 458 ms 39004 KB Output is correct
38 Correct 328 ms 35072 KB Output is correct
39 Correct 299 ms 42732 KB Output is correct
40 Correct 427 ms 37764 KB Output is correct
41 Correct 6 ms 5356 KB Output is correct
42 Correct 7 ms 5376 KB Output is correct
43 Correct 7 ms 5356 KB Output is correct
44 Correct 5 ms 5356 KB Output is correct
45 Correct 6 ms 5356 KB Output is correct
46 Correct 5 ms 5356 KB Output is correct
47 Correct 6 ms 5356 KB Output is correct
48 Correct 6 ms 5356 KB Output is correct
49 Correct 5 ms 5356 KB Output is correct
50 Correct 5 ms 5356 KB Output is correct
51 Correct 372 ms 35076 KB Output is correct
52 Correct 352 ms 42732 KB Output is correct
53 Correct 466 ms 37884 KB Output is correct
54 Correct 269 ms 35096 KB Output is correct
55 Correct 305 ms 35196 KB Output is correct
56 Correct 338 ms 42988 KB Output is correct
57 Correct 434 ms 38660 KB Output is correct
58 Correct 274 ms 35448 KB Output is correct
59 Correct 340 ms 34972 KB Output is correct
60 Correct 339 ms 42860 KB Output is correct
61 Correct 460 ms 38788 KB Output is correct
62 Correct 267 ms 34476 KB Output is correct
63 Correct 312 ms 34356 KB Output is correct
64 Correct 331 ms 42732 KB Output is correct
65 Correct 475 ms 38524 KB Output is correct
66 Correct 264 ms 35144 KB Output is correct
67 Correct 325 ms 34952 KB Output is correct
68 Correct 342 ms 42696 KB Output is correct
69 Correct 447 ms 37644 KB Output is correct
70 Correct 287 ms 34400 KB Output is correct