oj.uz

답안 #424526

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
424526 2021-06-12T04:27:26 Z milleniumEeee Designated Cities (JOI19_designated_cities) C++17
6 / 100
 212 ms 24504 KB 
#include <bits/stdc++.h>
#define fr first
#define sc second
#define pii pair<int, int>
#define pb push_back
#define szof(s) (int)s.size()
#define all(s) s.begin(), s.end()
#define fastInp ios_base::sync_with_stdio(0); cin.tie(0);
//#define ll long long

template<class T>void chmax(T &a, T b){if (a < b)a = b;}
template<class T>void chmin(T &a, T b){if (b < a)a = b;}

#define int long long

using namespace std;

const int MAXN  = (int)2e5 + 5;
const int INF = 1e18;

int A[MAXN], B[MAXN], C[MAXN], D[MAXN];
vector <pii> g[MAXN];
int n;
int q;

int tin[MAXN], tout[MAXN];
int tiktak = 0;

void dfs(int v, int par) {
	tin[v] = ++tiktak;
	for (auto [to, cost] : g[v]) {
		if (to != par) {
			dfs(to, v);
		}
	}
	tout[v] = tiktak;
}

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

int used[MAXN][2], used_id = 0;

void add(int x) {
	for (int i = 1; i < n; i++) {
		int a = A[i];
		int b = B[i];
		if (father(a, b)) {
			if (father(b, x)) {
				used[i][0] = used_id;
			} else {
				used[i][1] = used_id;
			}
		}
		else {
			if (father(a, x)) {
				used[i][1] = used_id;
			}
			else {
				used[i][0] = used_id;
			}
		}
	}
}

int calc_ans() {
	int sum = 0;
	for (int i = 1; i < n; i++) {
		if (used[i][0] != used_id) {
			sum += C[i];
		}
		if (used[i][1] != used_id) {
			sum += D[i];
		}
	}
	return sum;
}

int ans[20];

void precalc() {
	fill(ans, ans + 20, INF);
	for (int mask = 1; mask < (1 << 16); mask++) {
		used_id++;
		for (int i = 0; i < 16; i++) {
			if (mask & (1 << i)) {
				add(i + 1);
			}
		}
		int bits = __builtin_popcount(mask);
		chmin(ans[bits], calc_ans());
	}
}

int e[MAXN];

void brute_force() {
	precalc();
	for (int i = 1; i <= q; i++) {
		cout << ans[e[i]] << endl;
	}
	exit(0);
}

signed main() {
	fastInp;
	cin >> n;
	for (int i = 1; i < n; i++) {
		cin >> A[i] >> B[i] >> C[i] >> D[i];
		g[A[i]].pb({B[i], C[i]});
		g[B[i]].pb({A[i], D[i]});
	}
	dfs(1, -1);
	
	cin >> q;
	for (int i = 1; i <= q; i++) {
		cin >> e[i];
	}
	if (n <= 16) {
		brute_force();
	}
	else {
		cout << "kek" << endl;
	}
}

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 4940 KB Output is correct
2 Correct 29 ms 5004 KB Output is correct
3 Correct 35 ms 4940 KB Output is correct
4 Correct 28 ms 5060 KB Output is correct
5 Correct 29 ms 4940 KB Output is correct
6 Correct 29 ms 4940 KB Output is correct
7 Correct 29 ms 4940 KB Output is correct
8 Correct 29 ms 4940 KB Output is correct
9 Correct 31 ms 4940 KB Output is correct
10 Correct 26 ms 4940 KB Output is correct
11 Correct 31 ms 5044 KB Output is correct

Subtask #2
0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 4940 KB Output is correct
2 Incorrect 212 ms 24504 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 4940 KB Output is correct
2 Incorrect 212 ms 24496 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 4940 KB Output is correct
2 Correct 29 ms 5004 KB Output is correct
3 Correct 35 ms 4940 KB Output is correct
4 Correct 28 ms 5060 KB Output is correct
5 Correct 29 ms 4940 KB Output is correct
6 Correct 29 ms 4940 KB Output is correct
7 Correct 29 ms 4940 KB Output is correct
8 Correct 29 ms 4940 KB Output is correct
9 Correct 31 ms 4940 KB Output is correct
10 Correct 26 ms 4940 KB Output is correct
11 Correct 31 ms 5044 KB Output is correct
12 Correct 10 ms 5064 KB Output is correct
13 Incorrect 4 ms 5196 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #5
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 4940 KB Output is correct
2 Incorrect 212 ms 24504 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6
0 / 44.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 4940 KB Output is correct
2 Correct 29 ms 5004 KB Output is correct
3 Correct 35 ms 4940 KB Output is correct
4 Correct 28 ms 5060 KB Output is correct
5 Correct 29 ms 4940 KB Output is correct
6 Correct 29 ms 4940 KB Output is correct
7 Correct 29 ms 4940 KB Output is correct
8 Correct 29 ms 4940 KB Output is correct
9 Correct 31 ms 4940 KB Output is correct
10 Correct 26 ms 4940 KB Output is correct
11 Correct 31 ms 5044 KB Output is correct
12 Correct 10 ms 4940 KB Output is correct
13 Incorrect 212 ms 24504 KB Output isn't correct
14 Halted 0 ms 0 KB -