Submission #404660

#	Time	Username	Problem	Language	Result	Execution time	Memory
404660		sad	Palembang Bridges (APIO15_bridge)	C++14	22 / 100	405 ms	26092 KiB

bridge

#include <bits/stdc++.h>
#define ll long long
#define fi first
#define se second
#define pb push_back
using namespace std;
int k,n;ll re=0;
map<ll,int>st,en;
ll no=0,fin=0;
vector<int>v;
int main()
{
    cin>>k>>n;ll w=0;
    for(int i=0;i<n;i++)
    {
        char a,b;
        int x,y;
        cin>>a>>x>>b>>y;
        re+=abs(x-y);
        if(a==b)continue;
        re++;
        if(x>y)swap(x,y);
        v.pb(x);v.pb(y);
        st[x]++;
        st[y];no++;
        en[y]++;w+=x;
    }
    ll mn=1e17;
    ll last=0;
    sort(v.begin(),v.end());
    ll r=0;
    for(auto it:st)
    {
        w+=fin*(it.fi-last);
        w-=no*(it.fi-last);
        fin+=en[it.fi];
        no-=st[it.fi];
        mn=min(mn,w);last=it.fi;

    }
    if(v.size()==0)mn=0;
    re+=2*mn;
    cout<<re;
}

Compilation message (stderr)

bridge.cpp: In function 'int main()':
bridge.cpp:31:8: warning: unused variable 'r' [-Wunused-variable]
   31 |     ll r=0;
      |        ^

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