Submission #415003

#	Time	Username	Problem	Language	Result	Execution time	Memory
415003		MKopchev	Carnival Tickets (IOI20_tickets)	C++14	100 / 100	1035 ms	80872 KiB

tickets

#include "tickets.h"
#include<bits/stdc++.h>
using namespace std;

//void allocate_tickets( std::vector<std::vector<int>> _d);

const int nmax=1500+42;

struct info
{
    int i,j;

    int diff;
};
vector<info> help;

bool cmp(info a,info b)
{
    return a.diff<b.diff;
}

int LHS[nmax];

std::vector<std::vector<int>> positions;

struct line
{
    int i,prefix,suffix;
};
vector<line> given;

bool cmp_2(line a,line b)
{
    return a.prefix<b.prefix;
}

int days;

int my_n,my_m;

void my_fill()
{
    sort(given.begin(),given.end(),cmp_2);

    for(int d=0;d<days;d++)
    {
        sort(given.begin(),given.end(),cmp_2);

        for(int j=my_n/2;j<my_n;j++)
        {
            given[j].prefix--;
            positions[given[j].i][given[j].prefix]=d;
        }

        for(int j=0;j<my_n/2;j++)
        {
            positions[given[j].i][my_m-given[j].suffix]=d;
            given[j].suffix--;
        }
    }
}
long long find_maximum(int k, std::vector<std::vector<int>> x) {
    days=k;
	int n = x.size();
	int m = x[0].size();

    my_n=n;
    my_m=m;


	long long outp=0;

	for (int i = 0; i < n; i++) {
		std::vector<int> row(m,-1);

		positions.push_back(row);

		for(int j=m-k;j<m;j++)
        {
            outp+=x[i][j];

            //cout<<i<<" "<<j<<" -> "<<x[i][j]<<" loss: "<<-x[i][j]-x[i][j-(m-k)]<<endl;

            info cur;
            cur.i=i;
            cur.j=j-(m-k);
            cur.diff=x[i][j]+x[i][j-(m-k)];

            help.push_back(cur);
        }
	}

	sort(help.begin(),help.end(),cmp);

	for(int i=0;i<n/2*k;i++)
	{
	    outp-=help[i].diff;

	    LHS[help[i].i]++;
	}

    for(int i=0;i<n;i++)
    {
        line me;

        me.i=i;

        me.prefix=LHS[i];
        me.suffix=days-LHS[i];

        given.push_back(me);
    }

    my_fill();

	allocate_tickets(positions);
	return outp;
}

/*
static int n;
static int m;
static int k;
static std::vector<std::vector<int>> d;
static std::vector<std::vector<int>> x;
static int called = 0;

static void check(bool cond, std::string message) {
    if (!cond) {
        printf("%s\n", message.c_str());
        exit(0);
    }
}


void allocate_tickets( std::vector<std::vector<int>> _d) {
    check(!called, "allocate_tickets called more than once");
    d = _d;
    check((int)d.size() == n, "allocate_tickets called with parameter of wrong size");
    for (int i = 0; i < n; i++) {
        check((int)d[i].size() == m, "allocate_tickets called with parameter of wrong size");
    }
    called = 1;
}

int main() {
    assert(scanf("%d %d %d", &n, &m, &k) == 3);
    x.resize(n);
    for (int i = 0; i < n; i++) {
        x[i].resize(m);
        for (int j=0; j < m; j++) {
            assert(scanf("%d", &x[i][j]) == 1);
        }
    }
    fclose(stdin);

    long long answer = find_maximum(k, x);
    check(called, "failure to call allocate_tickets");
    printf("%lld\n", answer);
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            if (j) printf(" ");
            printf("%d", d[i][j]);
        }
        printf("\n");
    }
    fclose(stdout);
    return 0;
}
*/

• 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