oj.uz

답안 #765325

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
765325 2023-06-24T10:48:49 Z vjudge1 Roadside Advertisements (NOI17_roadsideadverts) C++17
100 / 100
 46 ms 15508 KB 
#include <bits/stdc++.h>
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
// #pragma GCC optimize("Ofast,unroll-loops,fast-math,O3")
#define ent '\n'
#define f first
#define s second

using namespace std;
typedef long long ll;
typedef pair < int, int> pii;
typedef pair < ll, ll > pll;

const int maxn = 2e5 + 100;
const int mod = 1e9 + 7;
const int INF = 1e9;
const int LOG = 20;
const int K = 400;
const int P = 31;

int n, m;
vector < pii > g[maxn];
int pref[maxn], p[LOG][maxn], tin[maxn], tout[maxn], timer, depth[maxn], a[6];
ll ans = 0;
void dfs(int v){
    for(int i = 1;i < LOG;i++){
        p[i][v] = p[i - 1][p[i - 1][v]];
    }
    tin[v] = ++timer;
    for(auto to: g[v]){
        if(to.f == p[0][v])continue;
        p[0][to.f] = v;
        depth[to.f] = depth[v] + 1;
        pref[to.f] = pref[v] + to.s;
        dfs(to.f);
    }
    tout[v] = ++timer;
}

bool upper(int a, int b){return tin[a] <= tin[b] && tout[a] >= tout[b];}

int lca(int a, int b){
    if(upper(a, b))return a;
    if(upper(b, a))return b;
    for(int i = LOG - 1;i >= 0;i--){
        if(!upper(p[i][a], b) && p[i][a] != 0)a = p[i][a];
    }
    return p[0][a];
}

void solve(){
    cin >> n;
    for(int i = 1;i < n;i++){
        int u, v, w;
        cin >> u >> v >> w;
        u++, v++;
        g[u].push_back({v, w});
        g[v].push_back({u, w});
    }
    dfs(1);
    cin >> m;
    for(int i = 1;i <= m;i++){
        cin >> a[1];
        int LCA = a[1] + 1, ans = 0;
        for(int j = 2;j <= 5;j++){
            cin >> a[j];
            LCA = lca(LCA, a[j] + 1);
        }
        for(int j = 1;j <= 5;j++){
            int q = LCA;
            for(int k = 1;k < j;k++){
                int w = lca(a[j] + 1, a[k] + 1);
                if(depth[q] < depth[w]){
                    q = w;
                }
            }
            ans += pref[a[j] + 1] - pref[q];
        }
        cout << ans << ent;
    }
}

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int T = 1;
    // cin >> T;
    for(int i = 1;i <= T;i++){
        solve();
    }
}

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5076 KB Output is correct

Subtask #2
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 41 ms 13592 KB Output is correct
2 Correct 46 ms 15404 KB Output is correct
3 Correct 32 ms 15404 KB Output is correct
4 Correct 31 ms 15408 KB Output is correct
5 Correct 30 ms 15436 KB Output is correct
6 Correct 32 ms 15484 KB Output is correct
7 Correct 30 ms 15508 KB Output is correct
8 Correct 31 ms 15476 KB Output is correct
9 Correct 30 ms 15436 KB Output is correct
10 Correct 31 ms 15436 KB Output is correct

Subtask #3
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 24 ms 11680 KB Output is correct
2 Correct 42 ms 14588 KB Output is correct
3 Correct 29 ms 14656 KB Output is correct
4 Correct 26 ms 14740 KB Output is correct
5 Correct 26 ms 14664 KB Output is correct
6 Correct 39 ms 14800 KB Output is correct
7 Correct 33 ms 14788 KB Output is correct
8 Correct 26 ms 14680 KB Output is correct
9 Correct 27 ms 14796 KB Output is correct
10 Correct 27 ms 14756 KB Output is correct

Subtask #4
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5076 KB Output is correct
2 Correct 41 ms 13592 KB Output is correct
3 Correct 46 ms 15404 KB Output is correct
4 Correct 32 ms 15404 KB Output is correct
5 Correct 31 ms 15408 KB Output is correct
6 Correct 30 ms 15436 KB Output is correct
7 Correct 32 ms 15484 KB Output is correct
8 Correct 30 ms 15508 KB Output is correct
9 Correct 31 ms 15476 KB Output is correct
10 Correct 30 ms 15436 KB Output is correct
11 Correct 31 ms 15436 KB Output is correct
12 Correct 24 ms 11680 KB Output is correct
13 Correct 42 ms 14588 KB Output is correct
14 Correct 29 ms 14656 KB Output is correct
15 Correct 26 ms 14740 KB Output is correct
16 Correct 26 ms 14664 KB Output is correct
17 Correct 39 ms 14800 KB Output is correct
18 Correct 33 ms 14788 KB Output is correct
19 Correct 26 ms 14680 KB Output is correct
20 Correct 27 ms 14796 KB Output is correct
21 Correct 27 ms 14756 KB Output is correct
22 Correct 44 ms 13612 KB Output is correct
23 Correct 45 ms 11756 KB Output is correct
24 Correct 40 ms 14804 KB Output is correct
25 Correct 39 ms 14688 KB Output is correct
26 Correct 38 ms 14836 KB Output is correct
27 Correct 42 ms 14884 KB Output is correct
28 Correct 37 ms 14796 KB Output is correct
29 Correct 39 ms 14768 KB Output is correct
30 Correct 37 ms 14856 KB Output is correct
31 Correct 40 ms 14832 KB Output is correct