Submission #1239238

#	Time	Username	Problem	Language	Result	Execution time	Memory
1239238		mychecksedad	Wiring (IOI17_wiring)	C++20	0 / 100	0 ms	328 KiB

wiring

#include "wiring.h"
#include<bits/stdc++.h>
using namespace std;
#define pii pair<int,int>
#define pb push_back
#define ff first
#define ss second
#define vi vector<int>
#define ll long long int
#define all(x) x.begin(),x.end()
const int N = 250;

ll dp[N][N];
long long min_total_length(std::vector<int> R, std::vector<int> B) {
	vector<ll> r(all(R));
	vector<ll> b(all(B));
	int n = r.size();
	int m = b.size();
	vector<ll> C(n);
	vector<ll> D(m);
	for(int i = 0; i < n; ++i){
		int pos = lower_bound(all(b), r[i]) - b.begin();
		if(pos == m) --pos;
		ll mn = abs(b[pos] - r[i]);
		if(pos>0) mn = min(mn, abs(b[pos-1] - r[i]));
		C[i] = mn;
	}
	swap(n, m);
	swap(C, D);
	swap(r, b);
	for(int i = 0; i < n; ++i){
		int pos = lower_bound(all(b), r[i]) - b.begin();
		if(pos == m) --pos;
		ll mn = abs(b[pos] - r[i]);
		if(pos>0) mn = min(mn, abs(b[pos-1] - r[i]));
		C[i] = mn;
	}
	swap(n, m);
	swap(C, D);
	swap(r, b);

	ll ans = 0;
	for(ll x: C) ans += x;
	for(ll x: D) ans += x;

	if(n < m) swap(n, m), swap(r, b);

	vector<pair<ll, int>> dp(n);
	// for(ll x: r) pt.pb({x, 0});
	// for(ll x: b) pt.pb({x, 1});

	dp[0] = {abs(r[0] - b[0]), 0};
	for(int i = 1; i < n; ++i){
		dp[i] = {dp[i - 1].ff + abs(r[i] - b[dp[i - 1].ss]), dp[i - 1].ss};
		if(dp[i - 1].ss + 1 < m){
			ll nxt = dp[i - 1].ff + abs(r[i] - b[dp[i - 1].ss + 1]);
			if(dp[i].ff >= nxt || n - i == m - dp[i - 1].ss){
				dp[i] = {nxt, dp[i - 1].ss + 1};
			}
		}
	}


	return dp[n-1].ff;
}

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