Submission #121797

#	Time	Username	Problem	Language	Result	Execution time	Memory
121797		TuGSGeReL	Wiring (IOI17_wiring)	C++14	100 / 100	89 ms	7788 KiB

wiring

#include "wiring.h"
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>

using namespace std;
using namespace __gnu_pbds;

#define ll long long
#define mp make_pair
#define pub push_back
#define pob pop_back()
#define ss second
#define ff first
#define mt make_tuple
#define pof pop_front()
#define fbo find_by_order
#define ook order_of_key
#define lb lower_bound
#define ub upper_bound

typedef tree<int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;
using pll = pair <ll, ll>;
using pii = pair <int, int>;

vector <ll> x, y;
ll dp[200002], z = -1, opt, k = 1, hd, st;

ll cost(vector <ll>& n, ll hed, vector <ll>& m ) {
	ll cst = 0;
	
	for (int i = hed; i < n.size() - 1; i++)
		cst += n.back() - n[i];
		
	for (int i = 1; i < m.size(); i++)
		cst += m[i] - m[0];
	
	cst += max((ll)n.size() - hed, (ll)m.size()) * (m[0] - n.back());
	
	return cst;
}

ll calc(vector <ll>& n, vector <ll>& m) {
	
	if ( dp[opt + hd] == 1e18 )
	{
		opt = 0;
		st = cost(n, 0, m);
	}

	while ( opt > 0 && min(dp[opt + hd], dp[opt + hd + 1]) > min(dp[opt + hd], dp[opt + hd - 1]) + n.back() - n[opt - 1] + (max((ll)n.size() - opt + 1ll, (ll)m.size()) - max((ll)n.size() - opt, (ll)m.size())) * (m[0] - n.back()) )
		st += n.back() - n[opt - 1] + (max((ll)n.size() - opt + 1ll, (ll)m.size()) - max((ll)n.size() - opt, (ll)m.size())) * (m[0] - n.back()), opt--;
	
	return st + min(dp[hd + opt + 1], dp[hd + opt]);
}

long long min_total_length(vector<int> r, vector<int> b) {
	int i = 0, j = 0;
	
	for (int i1 = 1; i1 <= r.size() + b.size(); i1++)
		dp[i1] = 1e18;
	
	while ( i < r.size() || j < b.size() ) {
		
		if ( i != r.size() && (j == b.size() || r[i] < b[j]) ) {

			if ( z == -1 ) {
				y.pub(r[i]);
			} else {
				if ( z == 1 )
				{
					hd += x.size();
					x = y;
					y.clear();
					y.pub(r[i]);
					
					if ( x.size() )
					{
						opt = x.size() - 1;
						st = cost(x, opt, y);
						dp[k] = calc(x, y);
					}
				} else {
					y.pub(r[i]);
	
					if ( x.size() )
					{
						st -= (max((ll)y.size() - 1ll, (ll)x.size() - opt) - max((ll)y.size(), (ll)x.size() - opt)) * (y[0] - x.back()) - y.back() + y[0];
						dp[k] = calc(x, y);
					}
				}
			}
			i++;
			z = 0;
		} else {
			if ( z == -1 ) {
				y.pub(b[j]);
			} else {
				if ( z == 0 ) {
					hd += x.size();
					x = y;
					y.clear();
					y.pub(b[j]);
					
					if ( x.size() )
					{
						opt = x.size() - 1;
						st = cost(x, opt, y);
						dp[k] = calc(x, y);
					}
				} else {
					y.pub(b[j]);
					if ( x.size() )
					{
						st -= (max((ll)y.size() - 1ll, (ll)x.size() - opt) - max((ll)y.size(), (ll)x.size() - opt)) * (y[0] - x.back()) - y.back() + y[0];
						dp[k] = calc(x, y);
					}
				}
			}
			z = 1;
			j++;
		}
		k++;
	}
	
	return dp[r.size() + b.size()];
}

Compilation message (stderr)

wiring.cpp: In function 'long long int cost(std::vector<long long int>&, long long int, std::vector<long long int>&)':
wiring.cpp:31:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = hed; i < n.size() - 1; i++)
                    ~~^~~~~~~~~~~~~~
wiring.cpp:34:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 1; i < m.size(); i++)
                  ~~^~~~~~~~~~
wiring.cpp: In function 'long long int min_total_length(std::vector<int>, std::vector<int>)':
wiring.cpp:59:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i1 = 1; i1 <= r.size() + b.size(); i1++)
                   ~~~^~~~~~~~~~~~~~~~~~~~~~
wiring.cpp:62:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  while ( i < r.size() || j < b.size() ) {
          ~~^~~~~~~~~~
wiring.cpp:62:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  while ( i < r.size() || j < b.size() ) {
                          ~~^~~~~~~~~~
wiring.cpp:64:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if ( i != r.size() && (j == b.size() || r[i] < b[j]) ) {
        ~~^~~~~~~~~~~
wiring.cpp:64:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if ( i != r.size() && (j == b.size() || r[i] < b[j]) ) {
                          ~~^~~~~~~~~~~

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