Submission #1147534

#	Time	Username	Problem	Language	Result	Execution time	Memory
1147534		Theo830	Palembang Bridges (APIO15_bridge)	C++20	22 / 100	238 ms	24108 KiB

bridge

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll INF = 1e9+7;
const ll MOD = 998244353;
typedef pair<ll,ll> ii;
#define iii pair<ii,ll>
#define f(i,a,b) for(ll i = a;i < b;i++)
#define pb push_back
#define vll vector<ll>
#define F first
#define S second
#define all(x) (x).begin(), (x).end()
///I hope I will get uprating and don't make mistakes
///I will never stop programming
///sqrt(-1) Love C++
///Please don't hack me
///@TheofanisOrfanou Theo830
///Think different approaches (bs,dp,greedy,graphs,shortest paths,mst)
///Stay Calm
///Look for special cases
///Beware of overflow and array bounds
///Think the problem backwards
///Training
int main(void){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    ll szpos = 0,szneg = 0;
    map<ll,ll>mp;
    ll sumpos = 0,sumneg = 0;
    ll k,n;
    cin>>k>>n;
    assert(k == 1);
    char p[n],q[n];
    ll s[n],t[n];
    set<ll>ex;
    ll res = 0;
    f(i,0,n){
        cin>>p[i]>>s[i]>>q[i]>>t[i];
        ex.insert(s[i]);
        ex.insert(t[i]);
        if(p[i] != q[i]){
            mp[s[i]]++;
            mp[t[i]]++;
            sumpos += s[i];
            sumpos += t[i];
            szpos += 2;
            res++;
        }
        else{
            res += abs(s[i] - t[i]);
        }
    }
    ll ans = 1e18;
    for(auto x:ex){
        sumpos -= mp[x] * x;
        sumneg += mp[x] * x;
        szpos -= mp[x];
        szneg += mp[x];
        ans = min(ans,sumpos - x * szpos + x * szneg - sumneg);
    }
    cout<<ans + res<<"\n";
}

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