Submission #1124131

#	Time	Username	Problem	Language	Result	Execution time	Memory
1124131		epicci23	Carnival Tickets (IOI20_tickets)	C++17	Compilation error	0 ms	0 KiB

tickets

#include "tickets.h"
#include "bits/stdc++.h"
using namespace std;

long long find_maximum(int k, vector<vector<int>> x) {
	long long n = x.size(),m = x[0].size(),tot = 0;
    vector<vector<int>> ans(n,vector<int>(m,-1));
      
    priority_queue<array<long long,2>> pq;
    vector<long long> p(n,1);
    for(int i=0;i<n;i++) pq.push({x[i][k-p[i]]+x[i][m-p[i]],i});
    for(int i=0;i<k*n/2;i++){
      array<long long,2> u = pq.top();
      pq.pop();
      tot += u[0];
      long long ind = u[1];
      p[ind]++;
      pq.push({x[ind][k-p[ind]]+x[ind][m-p[ind]],ind});
    }
     
    vector<long long> lf(n);
    for(int i=0;i<n;i++) lf[i]=p[i]-1;
    
    array<long long,2> tag[n];
    for(int i=0;i<n;i++) tag[i]={0,0};

    for(int i=0;i<k;i++){
      vector<array<long long,2>> v;
      for(int j=0;j<n;j++) v.push_back({lf[j],j});
      sort(v.begin(),v.end());
      reverse(v.begin(),v.end());
      vector<long long> vals;
      for(int j=0;j<n;j++){
        long long ind = v[j][1];
      	if(j<n/2){
          lf[ind]--;
          tag[ind][1]++;
          ans[ind][m-tag[ind][1]]=i;
          vals.push_back(x[ind][m-tag[ind][1]]);
      	}
      	else{
      	  vals.push_back(x[ind][tag[ind][0]]);	
          ans[ind][tag[ind][0]]=i;
          tag[ind][0]++;
      	}
      }
      sort(all(vals));
      for(int j=0;j<n;j++){
        if(j<n/2) tot -= vals[j];
        else tot += vals[j];
      }
    }

	allocate_tickets(ans);
	return tot;
}

Compilation message (stderr)

tickets.cpp: In function 'long long int find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:47:12: error: 'all' was not declared in this scope; did you mean 'std::filesystem::perms::all'?
   47 |       sort(all(vals));
      |            ^~~
      |            std::filesystem::perms::all
In file included from /usr/include/c++/11/filesystem:44,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:129,
                 from tickets.cpp:2:
/usr/include/c++/11/bits/fs_fwd.h:154:7: note: 'std::filesystem::perms::all' declared here
  154 |       all               =  0777,
      |       ^~~