Submission #462515

#	Time	Username	Problem	Language	Result	Execution time	Memory
462515		Mounir	Snowball (JOI21_ho_t2)	C++14	33 / 100	2566 ms	6640 KiB

Main

#include <bits/stdc++.h>
#define sz(x) (int)x.size()
#define chmin(x, v) x = min(x, v)
#define chmax(x, v) x = max(x, v)
#define all(x) x.begin(), x.end()
#define pb push_back
#define pii pair<int, int>
#define deb first
#define fin second
#define int long long
using namespace std;
 
const int N = 5e5, OO = 1e18;
pii inters[N];
int nBoules, nJours;
 
int getInstant(int posInter, int posBoule){
      int delta = -(posBoule - posInter);
      int gauche = 0, droite = nJours + 1;
      while (droite > gauche){
            int mid = (gauche + droite)/2;
            if ((delta < 0 && inters[mid].deb <= delta) || (delta >= 0 && inters[mid].fin > delta))
                  droite = mid;
            else
                  gauche = mid + 1;
      }
      return gauche;
}
 
 
signed main(){ 
      ios::sync_with_stdio(false);
      cin.tie(nullptr);
      cout.tie(nullptr);
 
      cin >> nBoules >> nJours;
      vector<int> boules(nBoules);
      for (int& boule : boules)
            cin >> boule;
 
      int posCur = 0;
      inters[0] = {0, -1};
      for (int iJour = 1; iJour <= nJours; ++iJour){
            int delta; cin >> delta;
            posCur += delta;
            inters[iJour] = {min(inters[iJour - 1].deb, posCur), max(max(inters[iJour - 1].fin, posCur), 0ll)};
           // cout << "inter " << inters[iJour].deb << " " << inters[iJour].fin << endl;
      }

    //  int debut[nBoules];
 
      for (int iBoule = 0; iBoule < nBoules; ++iBoule){
            int gauche = boules[iBoule] + inters[nJours].deb, droite = boules[iBoule]; //Gauche
 
            while (droite > gauche){
                  int mid = floor((gauche + droite)/double(2));
                  int moment = getInstant(mid, boules[iBoule]);
 
                  if (moment <= nJours && (iBoule == 0 || moment < getInstant(mid, boules[iBoule - 1])))
                        droite = mid;
                  else
                        gauche = mid + 1;
            }

           // debut[iBoule] = ga
 
            int deb = gauche;
            gauche = boules[iBoule] - 1, droite = boules[iBoule] + inters[nJours].fin;
            while (droite > gauche){
                  int mid =  floor((gauche + droite)/double(2)) + 1;
                //  cout << "dicho " << gauche << " " << droite << " " << mid << endl;
                  //cout << getInstant(mid, boules[iBoule]) << endl << endl;
                  int moment = getInstant(mid, boules[iBoule]);
 
                  if (moment <= nJours && (iBoule == nBoules - 1 || moment < getInstant(mid, boules[iBoule + 1])))
                        gauche = mid;
                  else
                        droite = mid - 1;
            }
            
            cout << gauche - deb + 1 << endl;
        //    cout << couverts[iBoule].deb << " " << couverts[iBoule].fin << endl;
      }
      return 0;
 
}

• Subtask 1: 33 / 33
• Subtask 2: 0 / 67