Submission #1051334

#	Time	Username	Problem	Language	Result	Execution time	Memory
1051334		pawned	Wiring (IOI17_wiring)	C++17	0 / 100	154 ms	4160 KiB

wiring

#pragma GCC optimize("O1,O2,O3,Ofast,unroll-loops")

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

#define fi first
#define se second
#define pb push_back
typedef long long ll;
typedef pair<ll, ll> ii;
typedef vector<ll> vi;

#include "wiring.h"

ll min_total_length(vector<int> r_g, vector<int> b_g) {
	vi r, b;
	for (int x : r_g)
		r.pb(x);
	for (int x : b_g)
		b.pb(x);
	int N = r.size();
	int M = b.size();
	map<int, ll> dp;
	// dp[i][j]: min cost to connect first i red (exclusive)
	// with first j blue (exclusive)
	dp[0] = 0;
	for (int i = 1; i <= N; i++) {
//		cout<<"at "<<i<<endl;
		map<int, ll> newdp;
		for (int j = max(i - 10, 1); j <= min(i + 10, M); j++) {
//			cout<<"j: "<<j<<endl;
			newdp[j] = 1e18;
			if (newdp.find(j - 1) != newdp.end())
				newdp[j] = min(newdp[j], newdp[j - 1] + abs(r[i - 1] - b[j - 1]));
			if (dp.find(j) != dp.end())
				newdp[j] = min(newdp[j], dp[j] + abs(r[i - 1] - b[j - 1]));
			if (dp.find(j - 1) != dp.end())
				newdp[j] = min(newdp[j], dp[j - 1] + abs(r[i - 1] - b[j - 1]));
		}
		dp = newdp;
/*		cout<<"dp: "<<endl;
		for (pair<int, ll> p : dp)
			cout<<p.fi<<": "<<p.se<<endl;*/
	}
	return dp[M];
}

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