Submission #98885

#	Time	Username	Problem	Language	Result	Execution time	Memory
98885		square1001	Wiring (IOI17_wiring)	C++14	20 / 100	1051 ms	10088 KiB

wiring

#include "wiring.h"
#include <cmath>
#include <vector>
#include <algorithm>
using namespace std;
const long long inf = 1LL << 61;
long long min_total_length(std::vector<int> r, std::vector<int> b) {
	if(r.back() < b.front()) {
		int rn = r.size(), bn = b.size();
		long long ans = 0;
		for(int i : r) ans -= i;
		for(int i : b) ans += i;
		if(rn > bn) ans += (long long)b.front() * (rn - bn);
		if(rn < bn) ans -= (long long)r.back() * (bn - rn);
		return ans;
	}
	int n = r.size() + b.size();
	vector<pair<int, int> > v;
	for(int i : r) v.push_back(make_pair(i, 0));
	for(int i : b) v.push_back(make_pair(i, 1));
	sort(v.begin(), v.end());
	vector<long long> dp(2 * n + 1, inf);
	dp[n] = 0;
	for(pair<int, int> i : v) {
		vector<long long> ndp(2 * n + 1, inf);
		if(i.second == 1) {
			long long opt = inf;
			for(int j = 0; j <= 2 * n; ++j) {
				ndp[j] = min(ndp[j], opt - (long long)(abs(j - n)) * i.first);
				opt = min(opt, dp[j] + (long long)(abs(j - n)) * i.first);
			}
		}
		else {
			long long opt = inf;
			for(int j = 2 * n; j >= 0; --j) {
				ndp[j] = min(ndp[j], opt - (long long)(abs(j - n)) * i.first);
				opt = min(opt, dp[j] + (long long)(abs(j - n)) * i.first);
			}
		}
		dp = ndp;
	}
	return dp[n];
}

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