Submission #869065

#	Time	Username	Problem	Language	Result	Execution time	Memory
869065		12345678	Palembang Bridges (APIO15_bridge)	C++17	22 / 100	30 ms	1544 KiB

bridge

#include <bits/stdc++.h>

using namespace std;

int k, n, b, d;
char a, c;
vector<int> v;
vector<pair<int, int>> p;
long long res, mn=LLONG_MAX;

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>k>>n;
    if (k==1)
    {
        for (int i=0; i<n; i++)
        {
            cin>>a>>b>>c>>d;
            if (a==c) 
            {
                res+=abs(b-d);
                continue;
            }
            v.push_back(b);
            v.push_back(d);
            res++;
        }
        sort(v.begin(), v.end());
        int md=v[v.size()/2];
        for (auto x:v) res+=abs(x-md);
        cout<<res;
    }
    else
    {
        for (int i=0; i<n; i++)
        {
            cin>>a>>b>>c>>d;
            if (a==c) 
            {
                res+=abs(b-d);
                continue;
            }
            p.push_back({min(b, d), max(b, d)});
            res++;
        }
        sort(p.begin(), p.end());
        for (int i=0; i<(int)p.size()-1; i++)
        {
            long long tmp=0;
            int ed=i, st=i+1;
            vector<int> t1, t2;
            for (int j=0; j<=ed; j++) t1.push_back(p[j].first), t1.push_back(p[j].second);
            for (int j=st; j<p.size(); j++) t2.push_back(p[j].first), t2.push_back(p[j].second);
            int md1=t1[(int)t1.size()/2], md2=t2[(int)t2.size()/2];
            for (auto x:t1) tmp+=abs(x-md1);
            for (auto x:t2) tmp+=abs(x-md2);
            mn=min(mn, tmp);
        }
        cout<<res+mn;
    }
}

Compilation message (stderr)

bridge.cpp: In function 'int main()':
bridge.cpp:54:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |             for (int j=st; j<p.size(); j++) t2.push_back(p[j].first), t2.push_back(p[j].second);
      |                            ~^~~~~~~~~

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