oj.uz

답안 #293529

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
293529 2020-09-08T07:20:26 Z davooddkareshki Election Campaign (JOI15_election_campaign) C++17
100 / 100
 535 ms 41976 KB 
#include<bits/stdc++.h>

using namespace std;

#define int long long
#define F first
#define S second
#define pii pair<int,int>
#define mpr make_pair

typedef long long ll;

const int maxn = 1e5+2;
const int mod = 1e9+7;
const int inf = 1e9+10;

vector<int> g[maxn];
int par[maxn][20], tin[maxn], st[maxn], tim, h[maxn], n, m;
void pfs(int v)
{
    for(int i = 1; (1<<i) <= h[v]; i++)
        par[v][i] = par[par[v][i-1]][i-1];

    tin[v] = ++tim;
    st[v] = 1;
    for(auto u : g[v])
        if(u != par[v][0])
        {
            par[u][0] = v;
            h[u] = h[v] + 1;
            pfs(u);
            st[v] += st[u];
        }
}

int get_par(int v, int he)
{
    int i = 0;
    while(he)
    {
        if(he&1) v = par[v][i];
        he >>= 1; i++;
    }
    return v;
}

int lca(int u, int v)
{
    if(h[u] > h[v]) swap(u,v);
    v = get_par(v,h[v]-h[u]);
    if(u == v) return v;

    for(int i = 19; i >= 0; i--)
        if(par[v][i] != par[u][i])
        {
            v = par[v][i];
            u = par[u][i];
        }
    return par[v][0];
}

struct fenwick
{
    int fen[maxn];

    void _add(int pos, int val)
    {
        for(; pos <= n; pos |= (pos+1))
            fen[pos] += val;
    }

    void add(int v, int val)
    {
        /// be zirderakht v val ta ezafe kon
        int l = tin[v], r = tin[v] + st[v] - 1;
        _add(l,val);
        _add(r+1,-val);
    }

    int qu(int v)
    {
        int pos = tin[v], res = 0;
        for(; pos >= 0; pos = (pos&(pos+1))-1)
            res += fen[pos];
        return res;
    }
} fen;

int dp[maxn];
vector<pair<pii,int>> Q[maxn];
void dfs(int v)
{
    int sum = 0;
    for(auto u : g[v])
        if(u != par[v][0])
        {
            dfs(u);
            sum += dp[u];
        }

    dp[v] = sum;
    for(auto e : Q[v])
    {
        int x = e.F.F, y = e.F.S, c = e.S;
        int ans = fen.qu(x) + fen.qu(y) - 2 * fen.qu(par[v][0]);
        /// (v = Root) ham check kon    x anc y ham chek kon
        ans -= sum;
        dp[v] = max(dp[v],ans+c);
    }
    fen.add(par[v][0],dp[v]);
    fen.add(v,-dp[v]);
}

signed main()
{
	//ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);

    cin>> n;
    for(int i = 1, u, v; i < n; i++)
    {
        cin>> u >> v;
        g[u].push_back(v);
        g[v].push_back(u);
    }
    pfs(1);
    cin>> m;
    for(int i = 1, x, y, c; i <= m; i++)
    {
        cin>> x >> y >> c;
        Q[lca(x,y)].push_back({{x,y},c});
    }
    dfs(1);
    cout<< dp[1];
}
/*
7
3 4
6 5
2 7
1 5
7 5
4 5
5
4 3 10
5 6 5
2 6 9
7 2 2
1 3 8

8
1 2
2 3
3 4
4 5
5 6
6 7
7 8
5
7 5 4
5 8 9
4 3 9
1 3 3
2 8 11

10
10 6
2 7
1 9
9 8
3 8
6 4
7 8
5 4
4 8
7
1 3 1
4 10 1
2 8 1
5 3 1
3 7 1
8 5 1
1 9 1
*/

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 4 ms 4992 KB Output is correct
3 Correct 4 ms 4992 KB Output is correct
4 Correct 5 ms 5248 KB Output is correct
5 Correct 225 ms 29688 KB Output is correct
6 Correct 160 ms 36728 KB Output is correct
7 Correct 235 ms 34424 KB Output is correct
8 Correct 191 ms 30028 KB Output is correct
9 Correct 227 ms 32888 KB Output is correct
10 Correct 185 ms 29816 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 4 ms 4992 KB Output is correct
3 Correct 5 ms 5376 KB Output is correct
4 Correct 396 ms 41464 KB Output is correct
5 Correct 388 ms 41720 KB Output is correct
6 Correct 346 ms 41592 KB Output is correct
7 Correct 384 ms 41464 KB Output is correct
8 Correct 380 ms 41592 KB Output is correct
9 Correct 352 ms 41552 KB Output is correct
10 Correct 402 ms 41676 KB Output is correct

Subtask #3
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 4 ms 4992 KB Output is correct
3 Correct 5 ms 5376 KB Output is correct
4 Correct 396 ms 41464 KB Output is correct
5 Correct 388 ms 41720 KB Output is correct
6 Correct 346 ms 41592 KB Output is correct
7 Correct 384 ms 41464 KB Output is correct
8 Correct 380 ms 41592 KB Output is correct
9 Correct 352 ms 41552 KB Output is correct
10 Correct 402 ms 41676 KB Output is correct
11 Correct 38 ms 6520 KB Output is correct
12 Correct 405 ms 41792 KB Output is correct
13 Correct 409 ms 41932 KB Output is correct
14 Correct 366 ms 41976 KB Output is correct
15 Correct 412 ms 41828 KB Output is correct
16 Correct 371 ms 41848 KB Output is correct
17 Correct 399 ms 41848 KB Output is correct
18 Correct 388 ms 41780 KB Output is correct
19 Correct 370 ms 41976 KB Output is correct
20 Correct 395 ms 41848 KB Output is correct

Subtask #4
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 416 ms 33964 KB Output is correct
2 Correct 344 ms 41592 KB Output is correct
3 Correct 500 ms 38836 KB Output is correct
4 Correct 349 ms 34348 KB Output is correct
5 Correct 452 ms 38440 KB Output is correct
6 Correct 349 ms 34152 KB Output is correct
7 Correct 520 ms 37988 KB Output is correct
8 Correct 418 ms 33912 KB Output is correct
9 Correct 354 ms 41592 KB Output is correct
10 Correct 520 ms 36776 KB Output is correct

Subtask #5
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 4 ms 4992 KB Output is correct
3 Correct 4 ms 4992 KB Output is correct
4 Correct 5 ms 5248 KB Output is correct
5 Correct 225 ms 29688 KB Output is correct
6 Correct 160 ms 36728 KB Output is correct
7 Correct 235 ms 34424 KB Output is correct
8 Correct 191 ms 30028 KB Output is correct
9 Correct 227 ms 32888 KB Output is correct
10 Correct 185 ms 29816 KB Output is correct
11 Correct 6 ms 5376 KB Output is correct
12 Correct 6 ms 5376 KB Output is correct
13 Correct 7 ms 5376 KB Output is correct
14 Correct 7 ms 5504 KB Output is correct
15 Correct 6 ms 5376 KB Output is correct
16 Correct 7 ms 5436 KB Output is correct
17 Correct 6 ms 5376 KB Output is correct
18 Correct 7 ms 5376 KB Output is correct
19 Correct 6 ms 5376 KB Output is correct
20 Correct 7 ms 5376 KB Output is correct

Subtask #6
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 4 ms 4992 KB Output is correct
3 Correct 4 ms 4992 KB Output is correct
4 Correct 5 ms 5248 KB Output is correct
5 Correct 225 ms 29688 KB Output is correct
6 Correct 160 ms 36728 KB Output is correct
7 Correct 235 ms 34424 KB Output is correct
8 Correct 191 ms 30028 KB Output is correct
9 Correct 227 ms 32888 KB Output is correct
10 Correct 185 ms 29816 KB Output is correct
11 Correct 4 ms 4992 KB Output is correct
12 Correct 4 ms 4992 KB Output is correct
13 Correct 5 ms 5376 KB Output is correct
14 Correct 396 ms 41464 KB Output is correct
15 Correct 388 ms 41720 KB Output is correct
16 Correct 346 ms 41592 KB Output is correct
17 Correct 384 ms 41464 KB Output is correct
18 Correct 380 ms 41592 KB Output is correct
19 Correct 352 ms 41552 KB Output is correct
20 Correct 402 ms 41676 KB Output is correct
21 Correct 38 ms 6520 KB Output is correct
22 Correct 405 ms 41792 KB Output is correct
23 Correct 409 ms 41932 KB Output is correct
24 Correct 366 ms 41976 KB Output is correct
25 Correct 412 ms 41828 KB Output is correct
26 Correct 371 ms 41848 KB Output is correct
27 Correct 399 ms 41848 KB Output is correct
28 Correct 388 ms 41780 KB Output is correct
29 Correct 370 ms 41976 KB Output is correct
30 Correct 395 ms 41848 KB Output is correct
31 Correct 416 ms 33964 KB Output is correct
32 Correct 344 ms 41592 KB Output is correct
33 Correct 500 ms 38836 KB Output is correct
34 Correct 349 ms 34348 KB Output is correct
35 Correct 452 ms 38440 KB Output is correct
36 Correct 349 ms 34152 KB Output is correct
37 Correct 520 ms 37988 KB Output is correct
38 Correct 418 ms 33912 KB Output is correct
39 Correct 354 ms 41592 KB Output is correct
40 Correct 520 ms 36776 KB Output is correct
41 Correct 6 ms 5376 KB Output is correct
42 Correct 6 ms 5376 KB Output is correct
43 Correct 7 ms 5376 KB Output is correct
44 Correct 7 ms 5504 KB Output is correct
45 Correct 6 ms 5376 KB Output is correct
46 Correct 7 ms 5436 KB Output is correct
47 Correct 6 ms 5376 KB Output is correct
48 Correct 7 ms 5376 KB Output is correct
49 Correct 6 ms 5376 KB Output is correct
50 Correct 7 ms 5376 KB Output is correct
51 Correct 435 ms 34340 KB Output is correct
52 Correct 433 ms 41848 KB Output is correct
53 Correct 535 ms 37288 KB Output is correct
54 Correct 382 ms 34284 KB Output is correct
55 Correct 431 ms 34348 KB Output is correct
56 Correct 413 ms 41848 KB Output is correct
57 Correct 464 ms 38196 KB Output is correct
58 Correct 384 ms 34348 KB Output is correct
59 Correct 427 ms 34288 KB Output is correct
60 Correct 395 ms 41976 KB Output is correct
61 Correct 466 ms 38196 KB Output is correct
62 Correct 366 ms 34048 KB Output is correct
63 Correct 423 ms 33804 KB Output is correct
64 Correct 388 ms 41844 KB Output is correct
65 Correct 520 ms 38060 KB Output is correct
66 Correct 368 ms 34364 KB Output is correct
67 Correct 456 ms 34160 KB Output is correct
68 Correct 393 ms 41880 KB Output is correct
69 Correct 456 ms 36788 KB Output is correct
70 Correct 376 ms 34348 KB Output is correct