Submission #892693

#	Time	Username	Problem	Language	Result	Execution time	Memory
892693		box	Construction of Highway (JOI18_construction)	C++17	7 / 100	18 ms	1568 KiB

construction

#include <bits/stdc++.h>
using namespace std;

#define ar array
#define sz(v) int(std::size(v))
using i64 = long long;
using pii = pair<int, int>;

const int N = 500;

int n, c[N];
vector<int> adj[N];
vector<int> path[N];
vector<pii> con;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cin >> n;
    for (int i = 0; i < n; i++) cin >> c[i];
    for (int h = 0; h < n - 1; h++) {
        int i, j;
        cin >> i >> j, i--, j--;
        adj[i].push_back(j);
        adj[j].push_back(i);
        con.push_back({i, j});
    }
    path[0] = {0};
    for (auto [i, j] : con) {
        path[j] = path[i];
        path[j].push_back(j);
        int cost = 0;
        for (int x = 0; x < sz(path[i]); x++) for (int y = x + 1; y < sz(path[i]); y++)
            cost += c[path[i][x]] > c[path[i][y]];
        for (int v : path[j]) c[v] = c[j];
        cout << cost << '\n';
    }
}

• Subtask 1: 7 / 7
• Subtask 2: 0 / 9
• Subtask 3: 0 / 84