Submission #914953

#	Time	Username	Problem	Language	Result	Execution time	Memory
914953		12345678	Palembang Bridges (APIO15_bridge)	C++17	22 / 100	33 ms	5592 KiB

bridge

#include <bits/stdc++.h>
 
using namespace std;
 
const int nx=1e5+5;

#define ll long long

ll k, n, b, d, cnt;
char a, c;
vector<ll> v, l;
vector<pair<ll, ll>> p(nx);
ll res, ans=LLONG_MAX;
 
ll cal(int b1, int b2)
{
    ll tmp=0;
    for (int i=0; i<cnt; i++) tmp+=min(abs(p[i].first-b1)+abs(p[i].second-b1), abs(p[i].first-b2)+abs(p[i].second-b2))+1; //cout<<"here "<<p[i].first<<' '<<p[i].second<<' '<<tmp<<'\n';
    return tmp;
}

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);
            else p[cnt++]={b, d}, l.push_back(b), l.push_back(d);
        }
        for (int i=0; i<l.size(); i++) for (int j=i+1; j<l.size(); j++) ans=min(ans, res+cal(l[i], l[j])); //cout<<res<<' '<<l[i]<<' '<<l[j]<<' '<<cal(l[i], l[j])<<'\n';
        cout<<ans;
    }
}

/*
2 5
B 0 A 4
B 1 B 3
A 5 B 7
B 2 A 6
B 1 A 7
*/

Compilation message (stderr)

bridge.cpp: In function 'int main()':
bridge.cpp:53:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |         for (int i=0; i<l.size(); i++) for (int j=i+1; j<l.size(); j++) ans=min(ans, res+cal(l[i], l[j])); //cout<<res<<' '<<l[i]<<' '<<l[j]<<' '<<cal(l[i], l[j])<<'\n';
      |                       ~^~~~~~~~~
bridge.cpp:53:57: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |         for (int i=0; i<l.size(); i++) for (int j=i+1; j<l.size(); j++) ans=min(ans, res+cal(l[i], l[j])); //cout<<res<<' '<<l[i]<<' '<<l[j]<<' '<<cal(l[i], l[j])<<'\n';
      |                                                        ~^~~~~~~~~

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