Submission #905951

#	Time	Username	Problem	Language	Result	Execution time	Memory
905951		Muhammad_Aneeq	Palembang Bridges (APIO15_bridge)	C++17	31 / 100	2077 ms	5360 KiB

bridge

/*
بسم الله الرحمن الرحيم
Author:
                          (:Muhammad Aneeq:)
*/

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
#define int long long
bool comp(pair<int,int>a,pair<int,int>b)
{
	return (b.second>a.second);
}
void solve()
{
	int k,n;
	cin>>k>>n;
	long long ans=0;
	int z=0;
	vector<int>f;
	vector<pair<int,int>>d;
	for (int i=0;i<n;i++)
	{
		char a,b;
		int x,y;
		cin>>a>>x>>b>>y;
		if (a==b)
			ans+=abs(x-y);
		else
		{
			z+=abs(x-y);
			d.push_back({x,y});
			f.push_back(x);
			f.push_back(y);
		}	
	}
	sort(begin(f),end(f));
	int pre[f.size()+1]={};
	for (int i=0;i<f.size();i++)
		pre[i+1]=pre[i]+f[i];
	if (f.size())
	{
		if (k==1)
		{
			long long r=1e15+10;
			long long t=0;
			int i=f[d.size()];
			int g=lower_bound(begin(f),end(f),i)-begin(f);
			t+=pre[f.size()]-pre[g]-i*(f.size()-g);
			t+=i*(g+1)-pre[g+1];
			r=min(r,t);
			i=f[d.size()-1];
			t=0;
			g=lower_bound(begin(f),end(f),i)-begin(f);
			t+=pre[f.size()]-pre[g]-i*(f.size()-g);
			t+=i*(g+1)-pre[g+1];
			r=min(r,t);
			ans+=r;
		}
		else
		{
			long long r=1e15+10;
			for (int i=0;i<f.size();i++)
			{
				for (int j=i+1;j<f.size();j++)
				{
					long long t=0;
					for (auto k:d)
						t+=min(abs(k.first-f[i])+abs(k.second-f[i]),abs(k.first-f[j])+abs(k.second-f[j]));
					r=min(r,t);
				}
			}
			ans+=r;
		}
	}	
	cout<<ans+f.size()/2<<endl;
}
signed main()
{
  ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
        solve();
}

Compilation message (stderr)

bridge.cpp: In function 'void solve()':
bridge.cpp:41:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |  for (int i=0;i<f.size();i++)
      |               ~^~~~~~~~~
bridge.cpp:65:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |    for (int i=0;i<f.size();i++)
      |                 ~^~~~~~~~~
bridge.cpp:67:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |     for (int j=i+1;j<f.size();j++)
      |                    ~^~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 14 / 14
• Subtask 3: 9 / 9
• Subtask 4: 0 / 32
• Subtask 5: 0 / 37