Submission #753880

#	Time	Username	Problem	Language	Result	Execution time	Memory
753880		valerikk	Wiring (IOI17_wiring)	C++17	0 / 100	1075 ms	6532 KiB

wiring

#include "wiring.h"
#include <bits/stdc++.h>

using namespace std;

const long long INF = 2e18;

long long cost(vector<int> a, vector<int> b) {
	reverse(a.begin(), a.end());
	int n = a.size();
	int m = b.size();
	long long ret = 0;
	if (n < m) {
		for (int i = 0; i < n; ++i) {
			ret -= a[i];
		}
		ret -= (m - n) * 1ll * a[n - 1];
		for (int i = 0; i < m; ++i) {
			ret += b[i];
		}
	} else {
		for (int i = 0; i < n; ++i) {
			ret -= a[i];
		}
		ret += (n - m) * 1ll * b[0];
		for (int i = 0; i < m; ++i) {
			ret += b[i];
		}
	}
	return ret;
}

long long min_total_length(std::vector<int> r, std::vector<int> b) {
	int n = r.size();
	int m = b.size();
	vector<pair<int, int>> kek;
	for (int i = 0; i < n; ++i) {
		kek.push_back({r[i], 0});
	}
	for (int i = 0; i < m; ++i) {
		kek.push_back({b[i], 1});
	}
	sort(kek.begin(), kek.end());
	vector<vector<int>> a;
	for (int i = 0, j = 0; i < n + m; i = j) {
		while (kek[j].second == kek[i].second) {
			++j;
		}
		a.push_back({});
		for (int t = i; t < j; ++t) {
			a.back().push_back(kek[t].first);
		}
	}
	n = a.size();
	vector<int> sz(n);
	for (int i = 0; i < n; ++i) {
		sz[i] = a[i].size();
	}
	vector<long long> dp(sz[0] + 1, INF);
	dp[0] = 0;
	for (int rofl = 1; rofl < n; ++rofl) {
		vector<long long> ndp(sz[rofl] + 1, INF);
		ndp[0] = min(ndp[0], dp[sz[rofl - 1]]);
		vector<int> lol1;
		for (int i = sz[rofl - 1] - 1; i >= 0; --i) {
			lol1.push_back(a[rofl - 1][i]);
			vector<int> lol2;
			for (int j = 1; j <= sz[rofl]; ++j) {
				lol2.push_back(a[rofl][j - 1]);
				ndp[j] = min(ndp[j], dp[i] + cost(lol1, lol2));
			} 
		}
		dp = ndp;
		for (int i = sz[rofl]; i > 0; --i) {
			dp[i - 1] = min(dp[i - 1], dp[i]);
		}
	}
	return dp[sz[n - 1]];
}

• Subtask 1: 0 / 7
• Subtask 2: 0 / 13
• Subtask 3: 0 / 10
• Subtask 4: 0 / 25
• Subtask 5: 0 / 45