Submission #581395

#	Time	Username	Problem	Language	Result	Execution time	Memory
581395		MohamedFaresNebili	Carnival Tickets (IOI20_tickets)	C++14	11 / 100	1 ms	748 KiB

tickets

#include <bits/stdc++.h>
#include "tickets.h"
#include <ext/pb_ds/assoc_container.hpp>
 
        using namespace std;
        using namespace __gnu_pbds;
 
        using ll = long long;
        using pi = pair<ll, pair<ll, ll>>;
        using ii = pair<int, int>;
 
        #define pb push_back
        #define pp pop_back
        #define ff first
        #define ss second
 
        typedef tree<int, null_type, less<int>, rb_tree_tag,
            tree_order_statistics_node_update> indexed_set;
 
        ll find_maximum(int K, vector<vector<int>> A) {
            int N = A.size(), M = A[0].size(); ll res = 0;
            vector<vector<int>> S(N, vector<int> (M, -1));
 
            vector<pi> curr; vector<ll> arr;
            for(int l = 0; l < N; l++)
                for(int i = 0; i < M; i++)
                    curr.pb({A[l][i], {l, i}});
            sort(curr.begin(), curr.end());
 
            bool vis[N]; memset(vis, 0, sizeof vis);
            ll lo = 0, hi = 0, i = 0, l = (int)curr.size() - 1;
            for(; i < N / 2 && l >= 0; l--) {
                if(vis[curr[l].ss.ff]) continue;
                i++; arr.pb(curr[l].ff); S[curr[l].ss.ff][curr[l].ss.ss] = 0;
                vis[curr[l].ss.ff] = 1;
            }
            for(int l = 0; l < (int)curr.size(); l++) {
                if(vis[curr[l].ss.ff]) continue;
                arr.pb(curr[l].ff); S[curr[l].ss.ff][curr[l].ss.ss] = 0;
                vis[curr[l].ss.ff] = 1;
            }
 
            sort(arr.begin(), arr.end());
            ll md = (arr[N / 2] + arr[N / 2 - 1]) / 2;
            for(auto U : arr)
                res += abs(U - md);
            allocate_tickets(S);
            return res;
        }

Compilation message (stderr)

tickets.cpp: In function 'll find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:31:16: warning: unused variable 'lo' [-Wunused-variable]
   31 |             ll lo = 0, hi = 0, i = 0, l = (int)curr.size() - 1;
      |                ^~
tickets.cpp:31:24: warning: unused variable 'hi' [-Wunused-variable]
   31 |             ll lo = 0, hi = 0, i = 0, l = (int)curr.size() - 1;
      |                        ^~

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