Submission #640676

#	Time	Username	Problem	Language	Result	Execution time	Memory
640676		christinelynn	Palembang Bridges (APIO15_bridge)	C++17	0 / 100	0 ms	296 KiB

bridge

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define db double
#define pairll pair<ll,ll>
#define lpairll pair<ll,pairll>

#define repp(i,a,b) for (ll i = a; i <= b; i++)
#define repz(i,a,b) for (ll i = a; i < b; i++)
#define repm(i,a,b) for (ll i = a; i >= b; i--)
#define fr first
#define sc second
#define mp make_pair
#define pb push_back

const ll N = 3e5+5, MOD = 1e9+7, M = 1e5+5;
ll tc = 1, n, m, lr[N], rr[N];
ll x, y, k, otsum, dg;
string s, s1, s2, ye = "YES", no = "NO";
vector<pairll> v;
ll kir[N], kan[N], val[N], pr[N];

void input(){
  cin >> k >> n;
  v.pb(mp(0,2));
  repp(i,1,n){
    char A, B;
    ll L, R;
    cin >> A >> L >> B >> R;
    if (L > R) swap(L,R);
    if (A == B){
      otsum += abs(L-R);
    }
    else{ 
      otsum++;
      v.pb(mp(L,0));
      v.pb(mp(R,1));
    }
  }
}

void solve(){
  if (k == 1){
    sort(v.begin(),v.end());
    // ll cur = -1, num = 0;
    // for (auto i : v){
    //   if (i.fr > cur){
    //     cur = i.fr;
    //     num++;
    //     val[num] = cur;
    //   }
    //   if (i.sc == 0) lr[num]++;
    //   if (i.sc == 1) rr[num]++;
    // }
    // ll ans = LLONG_MAX;
    // ll nyal = 0;
    // // repp(i,1,num){
    // //   cout << i << " " << val[i] << " " << lr[i] << " " << rr[i] << endl;
    // // }
    // val[0] = val[1];
    // repp(i,1,num){
    //   kir[i] = kir[i-1]+nyal*2*(val[i]-val[i-1]);
    //   nyal += rr[i];
    // }
    // nyal = 0;
    // val[num+1] = val[num];
    // repm(i,num,1){
    //   kan[i] = kan[i+1]+nyal*2*(val[i+1]-val[i]);
    //   nyal += lr[i];
    // }
    // repp(i,1,num){
    //   ans = min(ans,kir[i]+kan[i]);
    //   //cout << i << " " << val[i] << " " << kir[i] << " " << kan[i] << endl;
    // }
    ll ans = 1e18;
    ll sz = v.size()-1;
    repp(i,1,sz){
      pr[i] = pr[i-1]+v[i].fr;
      //cout << i << " " << pr[i] << endl;
    }
    repp(i,1,sz){
      ll lefsum = pr[i], rigsum = pr[sz]-pr[i];
      ll cur = v[i].fr*i-lefsum;
      cur += rigsum-(sz-i)*v[i].fr;
      ans = min(ans,cur); 
    }
    cout << ans+otsum << endl;
  }
}

int main(){
  ios_base::sync_with_stdio(0);
  cin.tie(NULL);
  cout.tie(NULL);
  //cin >> tc;
  while(tc--){
    input();
    solve();
  }
}

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