Submission #303675

#	Time	Username	Problem	Language	Result	Execution time	Memory
303675		medmdg	Carnival Tickets (IOI20_tickets)	C++14	Compilation error	0 ms	0 KiB

tickets

#include <bits/stdc++.h>
#include "tickets.h"
using namespace std;
long long int fin(vector<vector<int> > a,int n,int m,int k){
    for(int i=0;i<n;i++){
        sort(a[i].begin(),a[i].end());
    }
     long long int ans=0;
    for(int i=0;i<n;i++){
        long long int ff=a[i][(m)/2];
        for(int j=0;j<m;j++){
            ans+=(long long int)(abs(ff-a[i][j]));
        }
    }
    return ans;
}
long long int find_maximum(int k, vector<vector<int> > x){
    int n=x.size();
    int m=x[0].size();
    if(m==1){
        vector<vector<int> > ans(n);
        vector<vector<int> > answ(k);
        for(int i=0;i<n;i++){
            ans[i].push_back(0);
            answ[0].push_back(x[i][0]);
        }
            allocate_tickets(ans);
            return fin(answ,k,n,k);
    }
    if(k==1){
        vector<vector<int> > a(k);
        vector<vector<int> > b(n);
        for(int i=0;i<n;i++)
            for(int j=0;j<m;j++)
                b[i][j]=-1;
        int mi[n];
        int ma[n];
        for(int i=0;i<n;i++){
            mi[i]=0;
            ma[i]=m-1;
        }
        vector<pair<int,int> > mini;
        vector<pair<int,int> > maxi;
        for(int i=0;i<n;i++){
            pair<int,int > v;
            v.first=a[i][mi[i]];
            v.second=i;
            mini.push_back(v);
            v.first=a[i][ma[i]];
            v.second=i;
            maxi.push_back(v);
        }
        sort(mini.begin(),mini.end());
        sort(maxi.begin(),maxi.end());
        for(int i=0;i<n/2;i++){
            a[0].push_back(mini[i].first);
            a[0].push_back(maxi[n-i-1].first);
            b[mini[i].second]++;
            b[maxi[i].second]++;
        }
        allocate_tickets(b);
        return fin(a,k,n,k);
    }
}

Compilation message (stderr)

tickets.cpp: In function 'long long int find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:58:30: error: no 'operator++(int)' declared for postfix '++' [-fpermissive]
   58 |             b[mini[i].second]++;
tickets.cpp:59:30: error: no 'operator++(int)' declared for postfix '++' [-fpermissive]
   59 |             b[maxi[i].second]++;
tickets.cpp:64:1: warning: control reaches end of non-void function [-Wreturn-type]
   64 | }
      | ^