Submission #710004

#	Time	Username	Problem	Language	Result	Execution time	Memory
710004		Foxyy	Designated Cities (JOI19_designated_cities)	C++17	7 / 100	310 ms	41504 KiB

designated_cities

/*****************/
/* [ ] Subtask 1 */
/* [o] Subtask 2 */
/* [ ] Subtask 3 */
/* [ ] Subtask 4 */
/* [ ] Subtask 5 */
/* [ ] Subtask 6 */
/*****************/

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

#define Foxyy cin.tie(0); cout.sync_with_stdio(0);
#define ll long long

const ll LINF = 1e18;

struct Solver {
	int n;
	vector<map<int, int>>& adj;
	int q;
	
	ll getAns0(int u, int p) {
		ll ret = 0;
		for (auto [v, w] : adj[u]) if (v != p) {
			ret = ret + w + getAns0(v, u);
		}
		return ret;
	}
	
	void getAns(ll& ans, ll cur, int u, int p) {
		ans = min(ans, cur);
		for (auto [v, w] : adj[u]) if (v != p) {
			getAns(ans, cur - w + adj[v][u], v, u);
		}
	}
	
	void solve() {
		ll ans0 = getAns0(0, -1);
		ll ans = LINF;
		getAns(ans, ans0, 0, -1);
		cout << ans << '\n';
	}
};

signed main() {
	Foxyy
	
	int T = 1;
//	cin >> T;
	while (T--) {
		int n;
		cin >> n;
		vector<map<int, int>> adj(n);
		for (int i = 0; i < n-1; i++) {
			int a, b, c, d;
			cin >> a >> b >> c >> d;
			a--, b--;
			adj[a][b] = c;
			adj[b][a] = d;
		}
		int q;
		cin >> q;
		
		Solver solver{n, adj, q};
		solver.solve();
	}
}

• Subtask 1: 0 / 6
• Subtask 2: 7 / 7
• Subtask 3: 0 / 9
• Subtask 4: 0 / 17
• Subtask 5: 0 / 17
• Subtask 6: 0 / 44