Submission #518770

#	Time	Username	Problem	Language	Result	Execution time	Memory
518770		DanerZein	Carnival Tickets (IOI20_tickets)	C++14	14 / 100	707 ms	75680 KiB

tickets

#include "tickets.h"
#include <vector>
#include <bits/stdc++.h>
// existen dos escenarios en el que la media sea maxima o en que sea minima

using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef pair<int,int> ii;
const int MAX_N=1510;
bool vis[MAX_N];
vector<vi> ti;
vector<vi> p1,p0;
int c0,c1;
void cero(int i,int ro){
  int t=p0[i].size()-1;
  ti[i][p0[i][t]]=ro;
  p0[i].pop_back();
  c0++;
}
void uno(int i,int ro){
  int t=p1[i].size()-1;
  ti[i][p1[i][t]]=ro;
  p1[i].pop_back();
  c1++;
}
long long find_maximum(int k, std::vector<std::vector<int>> x) {
  int n,m;
  n=x.size(); m=x[0].size();
  ti.resize(n);
  for(int i=0;i<n;i++){
    for(int j=0;j<m;j++) ti[i].push_back(-1);
  }
  p1.resize(n+1); p0.resize(n+1);
  for(int i=0;i<n;i++){
    for(int j=0;j<m;j++){
      if(x[i][j]) p1[i].push_back(j);
      else p0[i].push_back(j);
    }
  }
  ll ans=0;
  for(int ro=0;ro<k;ro++){
    c0=c1=0;
    memset(vis,0,sizeof vis);
    vector<ii> v0,v1;
    for(int i=0;i<n;i++){
      if(!p0[i].empty())
	v0.push_back(ii(p0[i].size(),i));
      if(!p1[i].empty())
	v1.push_back(ii(p1[i].size(),i));
    }
    sort(v0.begin(),v0.end());
    sort(v1.begin(),v1.end());
    int c=0;
    for(int i=v0.size()-1;i>=0;i--){
      cero(v0[i].second,ro);
      vis[v0[i].second]=1;
      v0.pop_back();
      c++;
      if(c==n/2) break;
    }
    c=0;
    for(int i=v1.size()-1;i>=0;i--){
      if(vis[v1[i].second]) continue;
      uno(v1[i].second,ro);
      vis[v1[i].second]=1;
      v1.pop_back();
      c++;
      if(c==n/2) break;
    }
    while(c0+c1<n){
      int t=v0.size()-1;
      if(!v0.empty() && !vis[v0[t].second]){
	cero(v0[t].second,ro);
	vis[v0[t].second]=1;
	v0.pop_back();
      }
      t=v1.size()-1;
      if(!v1.empty() && !vis[v1[t].second]) {
	uno(v1[t].second,ro);
	vis[v1[t].second]=1;
	v1.pop_back();
      }
    }
    ans+=min(c0,c1);
  }
  allocate_tickets(ti);
  return ans;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 16
• Subtask 3: 14 / 14
• Subtask 4: 0 / 14
• Subtask 5: 0 / 12
• Subtask 6: 0 / 23
• Subtask 7: 0 / 10