Submission #781738

#	Time	Username	Problem	Language	Result	Execution time	Memory
781738		Khizri	Carnival Tickets (IOI20_tickets)	C++17	0 / 100	1 ms	212 KiB

tickets

#include "tickets.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define F first
#define S second
#define INF 1e18
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define pii pair<int,int>
#define pll pair<ll,ll>
#define OK cout<<"Ok"<<endl;
#define MOD (ll)(1e9+7)
int n,m;
long long find_maximum(int k, std::vector<std::vector<int>> x) {
    n = x.size();
	m = x[0].size();
	vector<std::vector<int>> ans(n,vector<int>(m,-1));
	ll sum=0;
	for(int id=1;id<=k;id++){
        vector<pair<int,pair<int,pii>>>vt;
        for(int i=0;i<n;i++){
            int mn=1e9+7,mx=-1,l=0,r=0;
            for(int j=0;j<x[i].size();j++){
                if(ans[i][j]!=-1) continue;
                if(x[i][j]<mn){
                    mn=x[i][j];
                    l=j;
                }
                if(x[i][j]>mx){
                    mx=x[i][j];
                    r=j;
                }
            }
            vt.pb({mn-mx,{i,{l,r}}});
        }
        sort(all(vt));
        vector<int>v;
        for(int i=0;i<n/2;i++){
            int a=vt[i].S.F,l=vt[i].S.S.F,r=vt[i].S.S.S;
            ans[a][r]=id;
            v.pb(x[a][r]);
        }
        for(int i=n/2;i<n;i++){
            int a=vt[i].S.F,l=vt[i].S.S.F,r=vt[i].S.S.S;
            ans[a][l]=id;
            v.pb(x[a][l]);
        }
        sort(all(v));
        ll b=v[n/2-1];
        for(int i=0;i<n;i++){
            sum+=abs(b-v[i]);
        }
	}
	allocate_tickets(ans);
	return sum;
}

Compilation message (stderr)

tickets.cpp: In function 'long long int find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:25:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |             for(int j=0;j<x[i].size();j++){
      |                         ~^~~~~~~~~~~~
tickets.cpp:41:29: warning: unused variable 'l' [-Wunused-variable]
   41 |             int a=vt[i].S.F,l=vt[i].S.S.F,r=vt[i].S.S.S;
      |                             ^
tickets.cpp:46:43: warning: unused variable 'r' [-Wunused-variable]
   46 |             int a=vt[i].S.F,l=vt[i].S.S.F,r=vt[i].S.S.S;
      |                                           ^

• Subtask 1: 0 / 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