Submission #300165

#	Time	Username	Problem	Language	Result	Execution time	Memory
300165		model_code	Carnival Tickets (IOI20_tickets)	C++17	27 / 100	1354 ms	192376 KiB

tickets

// huajun-scam
#include "tickets.h"
#include<bits/stdc++.h>
using namespace std;
typedef long long int ll;
vector<set<pair<ll,ll> > > se;
int cur[1505];
long long find_maximum(int k, vector<vector<int>> d) {
    ll c = d.size();
    ll s = d[0].size();
    ll sum =0 ,a,b,x,maxn,minx,y,z;
    vector<vector<int>> answer;
    for (int i = 0; i < c; i++) {
        vector<int> row;
        for(int j=0;j<s;j++)row.push_back(-1);
        answer.push_back(row);
    }
    ll i,j;
    for(i=0;i<c;i++){
        set<pair<ll,ll> > temp;
        for(j=0;j<s;j++){
            temp.insert(make_pair(d[i][j],j));
        }
        se.push_back(temp);
    }
    for(i=0;i<k;i++){
        vector<tuple<ll,int,int> > v;
        y = se[0].size();
        for(j=0;j<c;j++){
            auto it = *se[j].begin();
            auto it2 = *(--se[j].end());
            cur[j] = it2.second;
            sum+=it2.first;
            v.push_back(make_tuple(it.first+it2.first,j,it.second));
        }
        sort(v.begin(),v.end());
        for(j=0;j<c/2;j++){
            tie(a,b,x) = v[j];
            sum-=a;
            se[b].erase(se[b].begin());
            cur[b] = x;
        }
        for(j=0;j<c;j++)answer[j][cur[j]] = i;
        for(j=0;j<c;j++){
            if(se[j].size()==y){
                se[j].erase(--se[j].end());
            }
        }
    }

    allocate_tickets(answer);
    return sum;
}

Compilation message (stderr)

tickets.cpp: In function 'long long int find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:45:28: warning: comparison of integer expressions of different signedness: 'std::set<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   45 |             if(se[j].size()==y){
      |                ~~~~~~~~~~~~^~~
tickets.cpp:11:22: warning: unused variable 'maxn' [-Wunused-variable]
   11 |     ll sum =0 ,a,b,x,maxn,minx,y,z;
      |                      ^~~~
tickets.cpp:11:27: warning: unused variable 'minx' [-Wunused-variable]
   11 |     ll sum =0 ,a,b,x,maxn,minx,y,z;
      |                           ^~~~
tickets.cpp:11:34: warning: unused variable 'z' [-Wunused-variable]
   11 |     ll sum =0 ,a,b,x,maxn,minx,y,z;
      |                                  ^

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