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Submission #915695

# Submission time Handle Problem Language Result Execution time Memory
915695 2024-01-24T14:49:03 Z tvladm2009 Palembang Bridges (APIO15_bridge) C++17
22 / 100
 33 ms 3772 KB 
#include <iostream>
#include <complex>
#include <vector>
#include <string>
#include <algorithm>
#include <cstdio>
#include <numeric>
#include <cstring>
#include <ctime>
#include <cstdlib>
#include <set>
#include <map>
#include <unordered_map>
#include <unordered_set>
#include <list>
#include <cmath>
#include <bitset>
#include <cassert>
#include <queue>
#include <stack>
#include <deque>
#include <random>
 
using namespace std;
template<typename T1, typename T2> inline void chkmin(T1 &a, T2 b) {if (a > b) a = b;}
template<typename T1, typename T2> inline void chkmax(T1 &a, T2 b) {if (a < b) a = b;}
#define files(FILENAME) read(FILENAME); write(FILENAME)
#define read(FILENAME) freopen((FILENAME + ".in").c_str(), "r", stdin)
#define write(FILENAME) freopen((FILENAME + ".out").c_str(), "w", stdout)
#define all(c) (c).begin(), (c).end()
#define sz(c) (int)(c).size()
#define left left228
#define right right228
#define y1 y1228
#define mp make_pair
#define pb push_back
#define y2 y2228
#define rank rank228
using ll = long long;
using ld = long double; 
const string FILENAME = "input";
 
int k, n;
map<int, vector<int>> ind;
 
struct three {
	ll first;
	ll second;
	ll third;
	
	bool operator < (three oth) const {
		return first > oth.first;
	}
};
 
int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	//read(FILENAME);
	cin >> k >> n;
	ll add = 0;
	vector<pair<int, int>> v;
	vector<int> points;
	int cnt = 0;
	for (int i = 1; i <= n; i++) {
		char p, q;
		int s, t;
		cin >> p >> s >> q >> t;
		if (p == q) {
			add += abs(s - t);
		} else {
			points.pb(s);
			points.pb(t);
			if (p == '1') {
				swap(s, t);
			}
			v.pb(mp(s, t));
			cnt++;
		}
	}
	sort(all(points));		
	if (k == 1) {
		auto f = [&](int bridge) {
			ll res = 0;
			for (auto i: points) {
				res += abs(i - bridge);
			}
			res += cnt;
			return res;
		};
		
		int med = (sz(points) + 1) / 2;
		cout << f(points[med - 1]) + add << '\n';
	} else {
		auto f = [&](int i, int j) {
			ll res = 0;
			for (auto x: v) {
				res += min(abs(x.first - i) + abs(x.second - i), abs(x.first - j) + abs(x.second - j));
			}
			res += cnt;
			return res;
		};
		vector<int> bridges = points;
		for (int i = 0; i < sz(points); i++) {
			for (int j = 0; j < sz(points); j++) {
				bridges.pb((points[i] + points[j]) / 2);
			}
		}
		ll ans = 1e18;
		for (auto i: bridges) {
			for (auto j: bridges) {
				chkmin(ans, f(i, j));
			}
		}
		cout << ans + add << '\n';
		return 0;
		sort(all(v));
		ll sum = 0;
		for (auto i: v) {
			sum += abs(i.second - i.first);
		}
		for (auto i: v) {
			ind[max(i.first, i.second)].pb(min(i.first, i.second));
		}
		points.resize(unique(all(points)) - points.begin());
		//ll ans = 1e18;
		for (int i = 0; i + 1 < sz(points); i++) {
			ll cost = sum;
			priority_queue<three> pq;
			int offset = 0;
			ll inpq = 2 * (points[i + 1] - points[i]); 
			for (int j = i + 1; j < sz(points); j++) {
				while (!pq.empty() && -pq.top().first <= offset) {
					cost += pq.top().second;
					inpq -= pq.top().third;
					pq.pop();
				}
				for (auto kek: ind[points[j]]) {
					if (kek >= points[i]) {
						cost -= points[j] - kek;
						pq.push({-(points[j] - points[i] + kek - points[i] - points[j] + kek + offset), points[j] - points[i] + kek - points[i], points[j] - kek});
						inpq += points[j] - kek;
					}
				}
				chkmin(ans, cost + inpq);
				if (j == sz(points)) {
					break;
				}
				offset += 2 * (points[j + 1] - points[j]);
			}
		}
		cout << ans + cnt + add << '\n';
	}
	return 0;
}
/*
2 5
B 0 A 4
B 1 B 3
A 5 B 7
B 2 A 6
B 1 A 7
 
5
2
5
5
7
*/

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 472 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 460 KB Output is correct
11 Correct 1 ms 348 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 504 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 600 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 17 ms 3192 KB Output is correct
13 Correct 33 ms 3652 KB Output is correct
14 Correct 26 ms 2776 KB Output is correct
15 Correct 20 ms 2636 KB Output is correct
16 Correct 19 ms 3008 KB Output is correct
17 Correct 22 ms 3772 KB Output is correct
18 Correct 28 ms 3324 KB Output is correct
19 Correct 31 ms 3516 KB Output is correct
20 Correct 22 ms 3328 KB Output is correct
21 Correct 28 ms 3520 KB Output is correct

Subtask #3
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 32.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 37.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -