oj.uz

Submission #776422

# Submission time Handle Problem Language Result Execution time Memory
776422 2023-07-07T21:04:06 Z hyakup Election Campaign (JOI15_election_campaign) C++17
100 / 100
 328 ms 71756 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long

const int maxn = 1e5 + 10;
const int inf = 1e9 + 10;
vector<int> adj[maxn], query[maxn];
set< pair< int, int > > s[maxn];
int val[maxn], sub[maxn], lazy[maxn], sum[maxn], resp[maxn];

void dfs( int cur, int pai ){
    sub[cur] = 1;
    int sumfilhos = 0;
    for( int& viz : adj[cur] ){
        if( viz == pai ) continue;
        dfs( viz, cur );
        sub[cur] += sub[viz];
        sumfilhos += resp[viz];
        if( adj[cur][0] == pai || sub[viz] > sub[adj[cur][0]] ) swap( viz, adj[cur][0] );
    }
    
    if( sub[cur] == 1 ){
        for( int x : query[cur] ) s[cur].insert({ x, 0 });
        //cout << cur << " " << resp[cur] << endl;
        return;
    }
    
    int big = adj[cur][0];
    swap( s[cur], s[big] ); swap( lazy[cur], lazy[big] );
    
    //cout << "------- " << cur << endl;
    lazy[cur] += sumfilhos - resp[big];
    resp[cur] = sumfilhos;
    //cout << lazy[cur] << endl;
    
    for( int x : query[cur] ){
        auto it = s[cur].lower_bound({ x, -inf });
        if( it != s[cur].end() && it->first == x ){
            //cout << "- "  << x << endl;
            //cout << it->second << " " << lazy[cur] << " " << endl;
            resp[cur] = max( resp[cur], ( it->second + lazy[cur] ) + val[x] );
            s[cur].erase(it);
        }
        else{
            s[cur].insert({ x, -lazy[cur] + sumfilhos });
        }
    }
    
    for( int viz : adj[cur] ){
        if( viz == pai || viz == big ) continue;
        for( auto [ x, v ] : s[viz] ){
            v += lazy[viz];
            
            auto it = s[cur].lower_bound({ x, -inf });
            if( it != s[cur].end() && it->first == x ){
                //cout << "- " << x << " " << viz << endl;
                //cout << it->second << " " << lazy[cur] << " " << v << endl;
                //cout << ( it->second + lazy[cur] ) + val[x] + v  << endl;
                resp[cur] = max( resp[cur], ( it->second + lazy[cur] ) + val[x] + v - resp[viz] );
                s[cur].erase(it);
            }
            else{
                s[cur].insert({ x, -lazy[cur] + v + sumfilhos - resp[viz] });
            }
        }
    }
    //cout << cur << " " << resp[cur] << endl;
}

main(){
    int n; cin >> n;
    for( int i = 1; i < n; i++ ){
        int a, b; cin >> a >> b;
        adj[a].push_back(b);
        adj[b].push_back(a);
    }
    int q; cin >> q;
    for( int i = 1; i <= q; i++ ){
        int a, b; cin >> a >> b >> val[i];
        query[a].push_back(i);
        query[b].push_back(i);
    }
    
    dfs( 1, 1 );
    cout << resp[1];
}

Compilation message

election_campaign.cpp:70:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   70 | main(){
      | ^~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 9684 KB Output is correct
2 Correct 4 ms 9648 KB Output is correct
3 Correct 4 ms 9684 KB Output is correct
4 Correct 4 ms 9684 KB Output is correct
5 Correct 64 ms 15860 KB Output is correct
6 Correct 59 ms 30796 KB Output is correct
7 Correct 67 ms 25756 KB Output is correct
8 Correct 62 ms 14512 KB Output is correct
9 Correct 67 ms 22620 KB Output is correct
10 Correct 54 ms 14536 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 9684 KB Output is correct
2 Correct 4 ms 9684 KB Output is correct
3 Correct 5 ms 9840 KB Output is correct
4 Correct 197 ms 37496 KB Output is correct
5 Correct 177 ms 37488 KB Output is correct
6 Correct 159 ms 35412 KB Output is correct
7 Correct 207 ms 37460 KB Output is correct
8 Correct 187 ms 37656 KB Output is correct
9 Correct 159 ms 35404 KB Output is correct
10 Correct 176 ms 37492 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 9684 KB Output is correct
2 Correct 4 ms 9684 KB Output is correct
3 Correct 5 ms 9840 KB Output is correct
4 Correct 197 ms 37496 KB Output is correct
5 Correct 177 ms 37488 KB Output is correct
6 Correct 159 ms 35412 KB Output is correct
7 Correct 207 ms 37460 KB Output is correct
8 Correct 187 ms 37656 KB Output is correct
9 Correct 159 ms 35404 KB Output is correct
10 Correct 176 ms 37492 KB Output is correct
11 Correct 25 ms 11348 KB Output is correct
12 Correct 178 ms 37544 KB Output is correct
13 Correct 180 ms 37484 KB Output is correct
14 Correct 164 ms 35372 KB Output is correct
15 Correct 181 ms 37480 KB Output is correct
16 Correct 164 ms 35536 KB Output is correct
17 Correct 177 ms 37492 KB Output is correct
18 Correct 178 ms 37516 KB Output is correct
19 Correct 162 ms 35424 KB Output is correct
20 Correct 189 ms 37536 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 327 ms 71076 KB Output is correct
2 Correct 158 ms 35348 KB Output is correct
3 Correct 199 ms 36440 KB Output is correct
4 Correct 223 ms 37836 KB Output is correct
5 Correct 188 ms 31724 KB Output is correct
6 Correct 223 ms 36064 KB Output is correct
7 Correct 206 ms 36392 KB Output is correct
8 Correct 215 ms 38112 KB Output is correct
9 Correct 159 ms 35408 KB Output is correct
10 Correct 217 ms 35716 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 9684 KB Output is correct
2 Correct 4 ms 9648 KB Output is correct
3 Correct 4 ms 9684 KB Output is correct
4 Correct 4 ms 9684 KB Output is correct
5 Correct 64 ms 15860 KB Output is correct
6 Correct 59 ms 30796 KB Output is correct
7 Correct 67 ms 25756 KB Output is correct
8 Correct 62 ms 14512 KB Output is correct
9 Correct 67 ms 22620 KB Output is correct
10 Correct 54 ms 14536 KB Output is correct
11 Correct 6 ms 10068 KB Output is correct
12 Correct 5 ms 9940 KB Output is correct
13 Correct 6 ms 9940 KB Output is correct
14 Correct 6 ms 9940 KB Output is correct
15 Correct 6 ms 10068 KB Output is correct
16 Correct 5 ms 9812 KB Output is correct
17 Correct 6 ms 9952 KB Output is correct
18 Correct 7 ms 9940 KB Output is correct
19 Correct 5 ms 9940 KB Output is correct
20 Correct 6 ms 9940 KB Output is correct

Subtask #6
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 9684 KB Output is correct
2 Correct 4 ms 9648 KB Output is correct
3 Correct 4 ms 9684 KB Output is correct
4 Correct 4 ms 9684 KB Output is correct
5 Correct 64 ms 15860 KB Output is correct
6 Correct 59 ms 30796 KB Output is correct
7 Correct 67 ms 25756 KB Output is correct
8 Correct 62 ms 14512 KB Output is correct
9 Correct 67 ms 22620 KB Output is correct
10 Correct 54 ms 14536 KB Output is correct
11 Correct 4 ms 9684 KB Output is correct
12 Correct 4 ms 9684 KB Output is correct
13 Correct 5 ms 9840 KB Output is correct
14 Correct 197 ms 37496 KB Output is correct
15 Correct 177 ms 37488 KB Output is correct
16 Correct 159 ms 35412 KB Output is correct
17 Correct 207 ms 37460 KB Output is correct
18 Correct 187 ms 37656 KB Output is correct
19 Correct 159 ms 35404 KB Output is correct
20 Correct 176 ms 37492 KB Output is correct
21 Correct 25 ms 11348 KB Output is correct
22 Correct 178 ms 37544 KB Output is correct
23 Correct 180 ms 37484 KB Output is correct
24 Correct 164 ms 35372 KB Output is correct
25 Correct 181 ms 37480 KB Output is correct
26 Correct 164 ms 35536 KB Output is correct
27 Correct 177 ms 37492 KB Output is correct
28 Correct 178 ms 37516 KB Output is correct
29 Correct 162 ms 35424 KB Output is correct
30 Correct 189 ms 37536 KB Output is correct
31 Correct 327 ms 71076 KB Output is correct
32 Correct 158 ms 35348 KB Output is correct
33 Correct 199 ms 36440 KB Output is correct
34 Correct 223 ms 37836 KB Output is correct
35 Correct 188 ms 31724 KB Output is correct
36 Correct 223 ms 36064 KB Output is correct
37 Correct 206 ms 36392 KB Output is correct
38 Correct 215 ms 38112 KB Output is correct
39 Correct 159 ms 35408 KB Output is correct
40 Correct 217 ms 35716 KB Output is correct
41 Correct 6 ms 10068 KB Output is correct
42 Correct 5 ms 9940 KB Output is correct
43 Correct 6 ms 9940 KB Output is correct
44 Correct 6 ms 9940 KB Output is correct
45 Correct 6 ms 10068 KB Output is correct
46 Correct 5 ms 9812 KB Output is correct
47 Correct 6 ms 9952 KB Output is correct
48 Correct 7 ms 9940 KB Output is correct
49 Correct 5 ms 9940 KB Output is correct
50 Correct 6 ms 9940 KB Output is correct
51 Correct 247 ms 37804 KB Output is correct
52 Correct 179 ms 37444 KB Output is correct
53 Correct 221 ms 36044 KB Output is correct
54 Correct 185 ms 30156 KB Output is correct
55 Correct 307 ms 69920 KB Output is correct
56 Correct 182 ms 37556 KB Output is correct
57 Correct 185 ms 31084 KB Output is correct
58 Correct 221 ms 37960 KB Output is correct
59 Correct 216 ms 37956 KB Output is correct
60 Correct 181 ms 37468 KB Output is correct
61 Correct 190 ms 31180 KB Output is correct
62 Correct 232 ms 39172 KB Output is correct
63 Correct 328 ms 70352 KB Output is correct
64 Correct 181 ms 37512 KB Output is correct
65 Correct 226 ms 35864 KB Output is correct
66 Correct 189 ms 28832 KB Output is correct
67 Correct 310 ms 71756 KB Output is correct
68 Correct 187 ms 37684 KB Output is correct
69 Correct 189 ms 29260 KB Output is correct
70 Correct 220 ms 33956 KB Output is correct