Submission #1043843

#	Time	Username	Problem	Language	Result	Execution time	Memory
1043843		aaaaaarroz	Carnival Tickets (IOI20_tickets)	C++17	100 / 100	508 ms	104704 KiB

tickets

    #include "tickets.h"
    #include <bits/stdc++.h>
    using namespace std;
    #define V vector
    #define VI V<int>
    V<VI> genalloc(V<VI>ones,V<VI>negs,int n,int m,int k){
        V<VI>ans(n,VI(m,-1));
        for(int i=0;i<k;i++){
            int cnto=0,cntn=0;
            vector<int>netrl;
            for(int j=0;j<n;j++){
                if(negs[j].empty())
                    ans[j][ones[j].back()]=i,
                    ones[j].pop_back(),cnto++;
                else if(ones[j].empty()) 
                    ans[j][negs[j].back()]=i,
                    negs[j].pop_back(),cntn++;
                else netrl.push_back(j);
            }
            for(auto j:netrl)if(cnto<n/2)
                ans[j][ones[j].back()]=i,
                ones[j].pop_back(),cnto++;
            else ans[j][negs[j].back()]=i,
                negs[j].pop_back(),cntn++;
        }
        return ans;
    }
    long long find_maximum(int k, V<VI> x) {
    	int n = x.size();
    	int m = x[0].size();
        priority_queue<pair<int,int>>pq;
        long long ans=0;
        V<VI> ones(n),negs(n);
        for(int i=0;i<n;i++)for(int j=0;j<k;j++) 
            negs[i].push_back(j),ans-=x[i][j],
            pq.push({x[i][j]+x[i][m-k+j],i});
        for(int q=0;q<n*k/2;q++){
            auto[x,y]=pq.top();
            ones[y].push_back(m-k+negs[y].back());
            negs[y].pop_back();pq.pop();ans+=x;
        }
    	allocate_tickets(genalloc(ones,negs,n,m,k));
    	return ans;
    }

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