Submission #549789

#	Time	Username	Problem	Language	Result	Execution time	Memory
549789		ala2	Palembang Bridges (APIO15_bridge)	C++14	22 / 100	207 ms	2500 KiB

bridge

#include <bits/stdc++.h>
#define int long long
#define pb push_back
#define F first
#define S second
#define B begin()
#define E end()
using namespace std;
vector<pair<int,int>>v;
int f(int x)
{
    int g=0;
    for(int i=0;i<v.size();i++)
    {
        g+=abs(v[i].F-x )+abs(v[i].S-x);
    }
    return g;
}
signed main()
{
    int n,k;
    cin>>k>>n;
    int ans=0;

    for(int i=0;i<n;i++)
    {
        char x,y;
        int a,b;
        cin>>x>>a>>y>>b;
        if(x==y)
        {
            ans+=abs(a-b);
        }
        else v.pb({a,b}),ans++;
    }
    sort(v.B,v.E);
    int x=v.size()/2;
    int l=-3,r=1000000005;
    int y=200;
    int mn=1e18;
    while(y--)
    {
        int mid1=l+(r-l)/3;
        int mid2=l+((r-l)/3)*2;
        mn=min(mn,f(mid1));
        mn=min(mn,f(mid2));
        if(f(mid2)<=f(mid1))
        {
            l=mid1;
        }
        else
            r=mid2;


    }
    mn=min(mn,f(l));
    cout<<min(mn,f(r))+ans<<endl;


}

Compilation message (stderr)

bridge.cpp: In function 'long long int f(long long int)':
bridge.cpp:13:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |     for(int i=0;i<v.size();i++)
      |                 ~^~~~~~~~~
bridge.cpp: In function 'int main()':
bridge.cpp:37:9: warning: unused variable 'x' [-Wunused-variable]
   37 |     int x=v.size()/2;
      |         ^

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